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REMOTE CONTROL AND PROGRAMMING REFERENCE
for the FLUKE 190 family
of ScopeMeter test tools
=============================================================
This file contains remote control and programming information
for the above-mentioned models with use of the PM9080
Optically Isolated RS232 Adapter/Cable.
It consists of the following chapters:
1. INSTALLING THE PM9080
2. INTRODUCTION TO PROGRAMMING
3. COMMAND REFERENCE
APPENDIXES
APPENDIX A ACKNOWLEDGE DATA
APPENDIX B STATUS DATA
APPENDIX C WAVEFORM DATA
APPENDIX D ASCII CODES
Page 1.1
=============================================================
1. INSTALLING THE PM9080
- Connect the PM9080 to the RS232 port of the computer.
If necessary, use a 9-pin to 25-pin adapter and
25-pin gender changer.
- Hook the PM9080 cable to the ScopeMeter.
- Turn on the computer and the ScopeMeter.
- Make sure that the communication settings match for the
RS232 port of the computer and the ScopeMeter.
After power-on, the default settings of the ScopeMeter
are as follows:
1200 baud, No parity, 8 data bits, 1 stop bit
You can modify the baud rate with the PC (Program
Communication) command. See chapter 3 COMMAND REFERENCE.
Other settings are fixed.
You can modify the computer RS232 port settings to match
the above ScopeMeter settings with the following
DOS command:
MODE COM1:1200,N,8,1
This command assumes that COM1 is the RS232 port used on
the computer. Replace COM1 in the above command with COM2,
COM3, or COM4 if one of these ports is used. You can place
this command in the computer startup file AUTOEXEC.BAT so
that the default settings for the computer are the same as
for the ScopeMeter. If you want to use a higher
data transfer speed (baud rate), let your QBASIC program
change the settings for both the computer and the
ScopeMeter. See the example under the PC (Program
Communication) command in chapter 3 COMMAND REFERENCE.
Page 2.1
=============================================================
2. INTRODUCTION TO PROGRAMMING
** Basic Programming Information **
When you have installed the PM9080 as described in the
previous chapter, you can control the ScopeMeter
from the computer with simple communication facilities, such
as GWBASIC, QuickBASIC and QBASIC (programming languages from
Microsoft Corporation).
All examples given in this manual are in the QBASIC language
but will also run in QuickBASIC. QuickBASIC allows you to
make executable files from programs so you can start such
programs directly from DOS.
It is assumed that you have knowledge of these programming
languages. QBASIC is supplied with Microsoft MS-DOS 5.0 and
higher and Windows 95, 98, and NT, including 'on-line' Help.
Features of the syntax and protocol for the ScopeMeter
are as follows:
- Easy input format with a 'forgiving' syntax:
All commands consist of two characters that can be
UPPER or lower case.
Parameters that sometimes follow the command may be
separated from it by one or more separation characters.
- Strict and consistent output format:
Alpha character responses are always in UPPERCASE.
Parameters are always separated by a comma
("," = ASCII 44, see Appendix D).
Responses always end with the carriage return code
(ASCII 13). Because the carriage return code is a
non-visible character (not visible on the screen or on
paper), this character is represented as in the
command syntax.
- Synchronization between input and output:
After receipt of every command, the ScopeMeter
returns an acknowledge character (digit) followed by the
carriage return code (ASCII 13). This indicates that the
command has been successfully received and executed.
The computer program must always read this acknowledge
response before sending the next command to the
ScopeMeter.
Page 2.2
** Commands sent to the ScopeMeter **
All commands for the ScopeMeter consist of a header
made up of two alpha characters sometimes followed by
parameters. Example:
RI This is the Reset Instrument command. It
resets the ScopeMeter.
Some of the commands are followed by one or more parameters
to give the ScopeMeter more information.
Example:
SS 8 This is the Save Setup command. It saves the
present acquisition settings in memory. The SS
header is followed by a separator (space),
then followed by the parameter "8" to
indicate where to store the settings. The
meaning of this parameter is described in
Chapter 3 COMMAND REFERENCE.
Some commands require several parameters.
Example:
WT 9,50,30 This is the Write Time command.
This command requires three parameters. The
parameters are separated by a comma, which is
called the Program Data Separator. You may
use only one comma between the parameters.
Also refer to the section 'Data Separators'.
A code at the end of each command tells the ScopeMeter
that the command is ended. This is the carriage return
code (ASCII 13) and is called the Program Message Terminator.
This code is needed to indicate to the ScopeMeter
that the command is completed so it can start executing the
command. Also refer to the section 'Command and Response
Terminators'.
Page 2.3
** Responses received from the ScopeMeter **
After each command sent to the ScopeMeter there
is an automatic response from it, indicated as
(which you MUST input), to let the computer know whether or
not the received command has been successfully executed.
Refer to the 'Acknowledge' section below.
There are several commands that ask the ScopeMeter
for response data. Such commands are called Queries.
Example:
ID This is the IDentification query, which asks for
the model number and the software version of the
ScopeMeter.
When the ScopeMeter has received a query, it sends
the reply as it does after any command, but
now it is followed by the queried response data.
The format of the response data depends upon which query is
sent. When a response consists of different response data
portions, these are separated with commas (ASCII code 44).
Also refer to the section 'Data Separators'.
All response data, as well as following
(queried) response data are terminated with the carriage
return code ( = ASCII 13). Also refer to the section
'Command and Response Terminators'.
Page 2.4
** Acknowledge **
After receiving of a command, the ScopeMeter
automatically returns the response to let the
computer know whether or not the received command has been
successfully executed.
This response is a one-digit number followed by as
response terminator. If is 0, it indicates
that the ScopeMeter has successfully executed the
command. If the command was a query, the
response is immediately followed by the queried response data
terminated with .
If is 1 or higher, it indicates that the
ScopeMeter has not executed the command
successfully. In that case, if the command was a query, the
response is NOT followed by any further
response data.
There can be several reasons for a non-zero
response. For more information see Appendix A.
In case of an error you can obtain more detailed status
information by using the ST (STATUS) query.
Note: YOU MUST ALWAYS INPUT , EVEN WHEN
THE COMMAND WAS NOT A QUERY.
Page 2.5
** Data Separators **
Data Separators are used between parameters sent to the
ScopeMeter and between values and strings received
from the ScopeMeter. Comma (",") is used as program
data separator as well as response data separator:
- Program Data Separator
Name Character ASCII Value Comments
Decimal
----------------------------------------------------------
comma , 44 Single comma allowed
- Response Data Separator
Name Character ASCII Value Comments
Decimal
----------------------------------------------------------
comma , 44
Page 2.6
** Command and Response Terminators **
(Message Terminators)
- Command (Program Message) Terminators
A code is needed at the end of each command to tell the
ScopeMeter that the command is ended, and that it
can start executing the command. This code is called the
Program Message Terminator. The code needed for the
ScopeMeter is carriage return (ASCII code 13 decimal).
Notes:
1. The carriage return code is a non-visible ASCII
character. Therefore this code is represented as
in the Command Syntax and Response Syntax lines given
for each command.
2. The QBASIC programming language, which is used for
all program examples, automatically adds a carriage
return to the end of the command output. (In the QBASIC
language, this is the PRINT #.... statement.)
After is recognized by the ScopeMeter, the
entered command is executed. After EACH command the
ScopeMeter returns to the
computer to signal the end of the command processing (also
see the section 'Acknowledge'.)
- Response (Message) Terminators
The response from the ScopeMeter ends with a
carriage return (ASCII 13). This is indicated as in
the Response Syntax for each command.
Page 2.7
** Typical program sequence **
An example
A typical program sequence consists of the following user
actions:
1. Set the communication parameters for the RS232 port of
the computer to match the ScopeMeter settings.
2. Output a command or query to the ScopeMeter.
3. Input the acknowledge response from the ScopeMeter.
If the response value is zero, go to step 4.
If the response value is non-zero, the ScopeMeter did not
execute the previous command. Read the error message from
the following acknowledge subroutine, recover the error,
and repeat the command or query. (This is not shown in the
following program example.)
4. If a query was output to the ScopeMeter, input its
response.
5. The sequence of points 2, 3, and 4 may be repeated for
different commands or queries.
6. Close the communication channel.
Refer to the program example on the next page.
Page 2.8
'Example of a typical program sequence:
'***************** Begin example program ****************
OPEN "COM1:1200,N,8,1,CS,DS,RB2048" FOR RANDOM AS #1
'This QBASIC program line sets the parameters for the
'RS232 port (COM1 on the Computer) to match the
'ScopeMeter power-on default settings. It also opens a
'communication channel (assigned #1) for input or output
'through the COM1 port. Your ScopeMeter must be connected
'to this port. "RB2048" sets the size of the computer
'receive buffer to 2048 bytes to prevent buffer overflow
'during communication with the ScopeMeter.
PRINT #1, "ID"
'Outputs the IDENTITY command (query) to the ScopeMeter.
GOSUB Acknowledge
'This subroutine inputs the acknowledge response from
'the ScopeMeter and displays an error message if the
'acknowledge value is non-zero.
INPUT #1, Response$
'This inputs the response data from the IDENTITY query.
PRINT Response$
'Displays the queried data.
CLOSE #1
'This closes the communication channel.
END
'This ends the program.
' Page 2.9
'**************** Acknowledge subroutine ******************
'Use this subroutine after each command or query sent to the
'ScopeMeter. This routine inputs the acknowledge
'response from the ScopeMeter. If the response is non-zero,
'the previous command was not correct or was not correctly
'received by the ScopeMeter. Then an error message is
'displayed and the program is aborted.
Acknowledge:
INPUT #1, ACK 'Reads acknowledge from ScopeMeter.
IF ACK <> 0 THEN
PRINT "Error "; ACK; ": ";
SELECT CASE ACK
CASE 1
PRINT "Syntax Error"
CASE 2
PRINT "Execution Error"
CASE 3
PRINT "Synchronization Error"
CASE 4
PRINT "Communication Error"
CASE IS < 1
PRINT "Unknown Acknowledge"
CASE IS > 4
PRINT "Unknown Acknowledge"
END SELECT
PRINT "Program aborted."
END
END IF
RETURN
'****************** End example program *****************
Page 3.1
=============================================================
3. COMMAND REFERENCE
CONVENTIONS
** Page layout used for each command **
- Header
Each command description starts on a new page with a header
for quickly finding the command. This header indicates the
command name and the two-character header used for the
command syntax. Example:
===========================================================
AUTO SETUP AS
-----------------------------------------------------------
Where AUTO SETUP is a descriptive name for the command
(this is no syntax!),
and AS are the first two characters used for
the command syntax (not the complete
syntax).
- Purpose:
Explains what the command does or what it is used for.
- Command Syntax:
Shows the syntax for the command. Parameters are separated
by commas. Commands are terminated by (carriage
return).
- Response Syntax:
Shows the format of the response from the ScopeMeter.
Responses are terminated by (carriage return).
Each Response Syntax starts with the
response, followed by the query response if the syntax
relates to a query.
- Example:
This is an example QBASIC program which shows how you can
use the command. The example may also include some other
commands to show the relation with these commands.
The following two comment lines (start with ') successively
indicate the beginning and the end of an example program.
'***************** Begin example program ****************
'****************** End example program *****************
Page 3.2
Use an MS-DOS Editor and copy the complete program between
these two lines to a file name with the .BAS extension.
Start QBASIC and open this file from the FILE menu.
Long programs (longer than 55 lines) include page breaks.
Such page breaks are preceded by the ' (remark) character
to prevent the QBASIC interpreter from interpreting them as
an incorrect statement.
When you have connected the ScopeMeter, you can start
the program from the RUN menu.
Page 3.3
** Syntax conventions **
The Command Syntax and the Response Syntax may contain the
following meta symbols and data elements:
UPPERCASE These characters are part of the syntax.
For commands, lower case is also allowed.
<...> An expression between these brackets is a
code, such as (carriage return) that can
not be expressed in a printable character, or
it is a parameter that is further specified.
Do not insert the brackets in the command!
[...] The item between these brackets is optional.
This means that you may omit it for the
command, or for a response it may not appear.
Do not insert the brackets in the command!
| This is a separator between selectable items.
This means that you must choose only one of
the items (exclusive or).
{...} Specifies an element that may be repeated 0 or
more instances.
(...) Grouping of multiple elements.
= 0 to 255
= 0 to 9
= + | -
= {}
= = = =
Two bytes representing a signed
integer value. The first byte is the
most significant and contains the
sign bit (bit 7).
= four 's
=
Two bytes representing an unsigned
integer value. The first byte is the
most significant.
= four 's
Page 3.4
=============================================================
** Overview of commands for the ScopeMeter **
COMMAND PAGE
COMMAND NAME HEADER NUMBER
-------------------------------------------------------
AUTO SETUP AS 3.5
ARM TRIGGER AT 3.7
CLEAR MEMORY CM 3.9
CPL VERSION QUERY CV 3.11
DEFAULT SETUP DS 3.13
GET DOWN GD 3.15
GO TO LOCAL GL 3.17
GO TO REMOTE GR 3.20
HOLD HO 3.21
IDENTIFICATION ID 3.23
INSTRUMENT STATUS IS 3.25
PROGRAM COMMUNICATION PC 3.28
PROGRAM SETUP PS 3.30
QUERY MEASUREMENT QM 3.34
QUERY PRINT QP 3.38
QUERY SETUP QS 3.42
QUERY WAVEFORM QW 3.43
READ DATE RD 3.59
RESET INSTRUMENT RI 3.61
REPLAY RP 3.63
RECALL SETUP RS 3.65
READ TIME RT 3.68
SWITCH ON SO 3.70
SAVE SETUP SS 3.71
STATUS QUERY ST 3.72
TRIGGER ACQUISITION TA 3.75
WRITE DATE WD 3.77
WRITE TIME WT 3.79
Page 3.5
=============================================================
AUTO SETUP AS
-------------------------------------------------------------
Purpose:
Invokes an automatic setup for the active mode. The result
of this command is the same as pressing the AUTO key
on the ScopeMeter.
Note: You can select the items that are affected by the
AUTO SET procedure via the USER OPTIONS key on
the ScopeMeter.
Command Syntax:
AS
Response Syntax:
Example:
The following example program sends an AUTO SETUP command to
the ScopeMeter. Connect a repetitive signal on
INPUT A to see the effect of AUTO SETUP.
' Page 3.6
'***************** Begin example program *****************
CLS 'Clears the PC screen.
OPEN "COM1:1200,N,8,1,CS,DS,RB2048" FOR RANDOM AS #1
PRINT #1, "AS" 'Sends AUTO SETUP command.
GOSUB Acknowledge 'Input acknowledge from ScopeMeter.
CLOSE #1
END
'**************** Acknowledge subroutine ******************
'Use this subroutine after each command or query sent to the
'ScopeMeter. This routine inputs the acknowledge
'response from the ScopeMeter. If the response is non-zero,
'the previous command was not correct or was not correctly
'received by the ScopeMeter. Then an error message is
'displayed and the program is aborted.
Acknowledge:
INPUT #1, ACK 'Reads acknowledge from ScopeMeter.
IF ACK <> 0 THEN
PRINT "Error "; ACK; ": ";
SELECT CASE ACK
CASE 1
PRINT "Syntax Error"
CASE 2
PRINT "Execution Error"
CASE 3
PRINT "Synchronization Error"
CASE 4
PRINT "Communication Error"
CASE IS < 1
PRINT "Unknown Acknowledge"
CASE IS > 4
PRINT "Unknown Acknowledge"
END SELECT
PRINT "Program aborted."
END
END IF
RETURN
'****************** End example program ******************
Page 3.7
=============================================================
ARM TRIGGER AT
-------------------------------------------------------------
Purpose:
Resets and arms the trigger system for a new acquisition.
This command is used for single shot measurements.
When the AT command is given while an acquisition is in
progress, this acquisition is aborted and the trigger
system is rearmed.
Command Syntax:
AT
Response Syntax:
Example:
The following example program arms the trigger system of
the ScopeMeter with the AT command.
This means that after this command the ScopeMeter starts an
acquisition when a trigger occurs from the signal (when
exceeding the trigger level) or from a TA (Trigger
Acquisition) command.
After the AT command it is assumed that the signal amplitude
is sufficient to trigger the acquisition. If it is not, you
can use the TA (TRIGGER ACQUISITION) command to force the
acquisition to be triggered. But this is not useful if you
want the acquisition to be started on a signal edge for
synchronization purposes.
Also see the example program for the IS command, which also
uses the AT command for a single shot application.
'***************** Begin example program *****************
OPEN "COM1:1200,N,8,1,CS,DS,RB2048" FOR RANDOM AS #1
PRINT #1, "AT" 'Sends the ARM TRIGGER command.
GOSUB Acknowledge 'Input acknowledge from ScopeMeter.
CLOSE #1
END
'
' Page 3.8
'**************** Acknowledge subroutine ******************
'Use this subroutine after each command or query sent to the
'ScopeMeter. This routine inputs the acknowledge
'response from the ScopeMeter. If the response is non-zero,
'the previous command was not correct or was not correctly
'received by the ScopeMeter. Then an error message is
'displayed and the program is aborted.
Acknowledge:
INPUT #1, ACK 'Reads acknowledge from ScopeMeter.
IF ACK <> 0 THEN
PRINT "Error "; ACK; ": ";
SELECT CASE ACK
CASE 1
PRINT "Syntax Error"
CASE 2
PRINT "Execution Error"
CASE 3
PRINT "Synchronization Error"
CASE 4
PRINT "Communication Error"
CASE IS < 1
PRINT "Unknown Acknowledge"
CASE IS > 4
PRINT "Unknown Acknowledge"
END SELECT
PRINT "Program aborted."
END
END IF
RETURN
'****************** End example program ******************
Page 3.9
=============================================================
CLEAR MEMORY CM
-------------------------------------------------------------
Purpose:
Clears all saved setups, waveforms, and screens from
memory.
Command Syntax:
CM
Response Syntax:
Example:
' Page 3.10
'***************** Begin example program *****************
OPEN "COM1:1200,N,8,1,CS,DS,RB2048" FOR RANDOM AS #1
PRINT #1,"CM" 'Sends the Clear Memory command.
GOSUB Acknowledge 'Input acknowledge from ScopeMeter.
CLOSE #1
END
'**************** Acknowledge subroutine ******************
'Use this subroutine after each command or query sent to the
'ScopeMeter. This routine inputs the acknowledge
'response from the ScopeMeter. If the response is non-zero,
'the previous command was not correct or was not correctly
'received by the ScopeMeter. Then an error message is
'displayed and the program is aborted.
Acknowledge:
INPUT #1, ACK 'Reads acknowledge from ScopeMeter.
IF ACK <> 0 THEN
PRINT "Error "; ACK; ": ";
SELECT CASE ACK
CASE 1
PRINT "Syntax Error"
CASE 2
PRINT "Execution Error"
CASE 3
PRINT "Synchronization Error"
CASE 4
PRINT "Communication Error"
CASE IS < 1
PRINT "Unknown Acknowledge"
CASE IS > 4
PRINT "Unknown Acknowledge"
END SELECT
PRINT "Program aborted."
END
END IF
RETURN
'****************** End example program ******************
Page 3.11
=============================================================
CPL VERSION QUERY CV
-------------------------------------------------------------
Purpose:
Queries the CPL interface version.
Command Syntax:
CV
Response Syntax:
[]
where,
is an ASCII string representing the year this
version has been created.
Example:
' Page 3.12
'***************** Begin example program *****************
OPEN "COM1:1200,N,8,1,CS,DS,RB2048" FOR RANDOM AS #1
PRINT #1,"CV" 'Sends CPL VERSION query.
GOSUB Acknowledge 'Input acknowledge from ScopeMeter.
INPUT #1,VERSION$ 'Inputs queried data.
PRINT "CPL Version "; VERSION$ 'Displays version data.
END
'**************** Acknowledge subroutine ******************
'Use this subroutine after each command or query sent to the
'ScopeMeter. This routine inputs the acknowledge
'response from the ScopeMeter. If the response is non-zero,
'the previous command was not correct or was not correctly
'received by the ScopeMeter. Then an error message is
'displayed and the program is aborted.
Acknowledge:
INPUT #1, ACK 'Reads acknowledge from ScopeMeter.
IF ACK <> 0 THEN
PRINT "Error "; ACK; ": ";
SELECT CASE ACK
CASE 1
PRINT "Syntax Error"
CASE 2
PRINT "Execution Error"
CASE 3
PRINT "Synchronization Error"
CASE 4
PRINT "Communication Error"
CASE IS < 1
PRINT "Unknown Acknowledge"
CASE IS > 4
PRINT "Unknown Acknowledge"
END SELECT
PRINT "Program aborted."
END
END IF
RETURN
'****************** End example program ******************
Page 3.13
=============================================================
DEFAULT SETUP DS
-------------------------------------------------------------
Purpose:
Resets the ScopeMeter to the factory settings at
delivery, except for the RS232 communication settings such
as baud rate, to keep the communication alive.
A Master Reset (refer to the Users Manual) performs the
same, but also resets the RS232 communication settings to
the default values.
Command Syntax:
DS
Response Syntax:
Note: Wait for at least 2 seconds after the
reply has been received, to let
the ScopeMeter settle itself before you send the
next command.
Example:
' Page 3.14
'***************** Begin example program *****************
OPEN "COM1:1200,N,8,1,CS,DS,RB2048" FOR RANDOM AS #1
CLS
PRINT #1, "DS" 'Sends DEFAULT SETUP command.
GOSUB Acknowledge 'Input acknowledge from ScopeMeter.
SLEEP 2 'Delay (2 s) necessary after "DS".
PRINT #1, "ID" 'Sends the IDENTIFICATION query.
GOSUB Acknowledge 'Input acknowledge from ScopeMeter.
INPUT #1, ID$ 'Inputs identity data from ScopeMeter.
PRINT ID$ 'Displays identity data.
CLOSE #1
END
'**************** Acknowledge subroutine ******************
'Use this subroutine after each command or query sent to the
'ScopeMeter. This routine inputs the acknowledge
'response from the ScopeMeter. If the response is non-zero,
'the previous command was not correct or was not correctly
'received by the ScopeMeter. Then an error message is
'displayed and the program is aborted.
Acknowledge:
INPUT #1, ACK 'Reads acknowledge from ScopeMeter.
IF ACK <> 0 THEN
PRINT "Error "; ACK; ": ";
SELECT CASE ACK
CASE 1
PRINT "Syntax Error"
CASE 2
PRINT "Execution Error"
CASE 3
PRINT "Synchronization Error"
CASE 4
PRINT "Communication Error"
CASE IS < 1
PRINT "Unknown Acknowledge"
CASE IS > 4
PRINT "Unknown Acknowledge"
END SELECT
PRINT "Program aborted."
END
END IF
RETURN
'****************** End example program ******************
Page 3.15
=============================================================
GET DOWN GD
-------------------------------------------------------------
Purpose:
Switches the instrument's power off. If a power adapter
is connected, you can use the SO command to switch power
on again. If there is no power adapter connected, the
instrument can only be switched on manually by pressing
the Power ON/OFF key.
Command Syntax:
GD
Response Syntax:
Example:
' Page 3.16
'***************** Begin example program *****************
OPEN "COM1:1200,N,8,1,CS,DS,RB2048" FOR RANDOM AS #1
CLS
PRINT #1, "GD" 'Sends the GET DOWN command.
GOSUB Acknowledge 'Input acknowledge from ScopeMeter.
PRINT "The GET DOWN command switched the ScopeMeter off."
PRINT "Press any key on the PC keyboard to switch "
PRINT "the ScopeMeter on again."
SLEEP
PRINT #1, "SO" 'Sends the SWITCH ON command.
GOSUB Acknowledge 'Input acknowledge from ScopeMeter.
CLOSE #1
END
'**************** Acknowledge subroutine ******************
'Use this subroutine after each command or query sent to the
'ScopeMeter. This routine inputs the acknowledge
'response from the ScopeMeter. If the response is non-zero,
'the previous command was not correct or was not correctly
'received by the ScopeMeter. Then an error message is
'displayed and the program is aborted.
Acknowledge:
INPUT #1, ACK 'Reads acknowledge from ScopeMeter.
IF ACK <> 0 THEN
PRINT "Error "; ACK; ": ";
SELECT CASE ACK
CASE 1
PRINT "Syntax Error"
CASE 2
PRINT "Execution Error"
CASE 3
PRINT "Synchronization Error"
CASE 4
PRINT "Communication Error"
CASE IS < 1
PRINT "Unknown Acknowledge"
CASE IS > 4
PRINT "Unknown Acknowledge"
END SELECT
PRINT "Program aborted."
END
END IF
RETURN
'****************** End example program ******************
Page 3.17
=============================================================
GO TO LOCAL GL
-------------------------------------------------------------
Purpose:
Sets the ScopeMeter in the local operation mode
so the keypad is enabled.
Also refer to the GR (Go to Remote) command.
Command Syntax:
GL
Response Syntax:
Example:
The following example uses the GR (GO TO REMOTE) command
(refer to the description for this command) to set the
ScopeMeter in the REMOTE state so that the keypad
is disabled. After that, the GL (GO TO LOCAL) command
is sent so that the keypad is enabled again.
' Page 3.18
'***************** Begin example program *****************
CLS 'Clears the PC screen.
OPEN "COM1:1200,N,8,1,CS,DS,RB2048" FOR RANDOM AS #1
PRINT #1, "GR" 'Sends GO TO REMOTE command.
GOSUB Acknowledge 'Input acknowledge from ScopeMeter.
PRINT "All ScopeMeter keys (except the Power ON/OFF key)
PRINT "are now disabled by the GR (GO TO REMOTE) command."
PRINT "Check this."
PRINT
PRINT "Press any key on the PC keyboard to continue."
SLEEP
PRINT
PRINT #1, "GL" 'Sends GO TO LOCAL command.
GOSUB Acknowledge 'Input acknowledge from ScopeMeter.
PRINT "The ScopeMeter keys are now enabled again by the "
PRINT "GL (GO TO LOCAL) command."
PRINT "Check this."
CLOSE #1
END
'
' Page 3.19
'**************** Acknowledge subroutine ******************
'Use this subroutine after each command or query sent to the
'ScopeMeter. This routine inputs the acknowledge
'response from the ScopeMeter. If the response is non-zero,
'the previous command was not correct or was not correctly
'received by the ScopeMeter. Then an error message is
'displayed and the program is aborted.
Acknowledge:
INPUT #1, ACK 'Reads acknowledge from ScopeMeter.
IF ACK <> 0 THEN
PRINT "Error "; ACK; ": ";
SELECT CASE ACK
CASE 1
PRINT "Syntax Error"
CASE 2
PRINT "Execution Error"
CASE 3
PRINT "Synchronization Error"
CASE 4
PRINT "Communication Error"
CASE IS < 1
PRINT "Unknown Acknowledge"
CASE IS > 4
PRINT "Unknown Acknowledge"
END SELECT
PRINT "Program aborted."
END
END IF
RETURN
'****************** End example program ******************
Page 3.20
=============================================================
GO TO REMOTE GR
-------------------------------------------------------------
Purpose:
Sets the ScopeMeter in the remote operation mode
so that the keypad is disabled.
You can use the following methods to return to the
local operation mode so that the keypad is enabled:
1. Sending the GL (Go to Local) command.
Command Syntax:
GR
Response Syntax:
See an example for this command under GO TO LOCAL (GL).
Page 3.21
=============================================================
HOLD HO
-------------------------------------------------------------
Purpose:
Sets the ScopeMeter in the Hold mode. In other words, the
ScopeMeter stops sampling the input channels and
calculating measurement results.
Command Syntax:
HO
Response Syntax:
Example:
' Page 3.22
'***************** Begin example program *****************
OPEN "COM1:1200,N,8,1,CS,DS,RB2048" FOR RANDOM AS #1
CLS
PRINT #1, "HO" 'Sends the HOLD command.
GOSUB Acknowledge 'Input acknowledge from ScopeMeter.
PRINT "The HOLD command has put the ScopeMeter in HOLD."
PRINT "Check on the ScopeMeter screen."
PRINT "Press any key on the PC keyboard to continue and"
PRINT "enable acquisition again."
SLEEP
PRINT #1, "AT" 'Sends the ARM TRIGGER command to
'enable acquisition again.
GOSUB Acknowledge 'Input acknowledge from ScopeMeter.
CLOSE #1
END
'**************** Acknowledge subroutine ******************
'Use this subroutine after each command or query sent to the
'ScopeMeter. This routine inputs the acknowledge
'response from the ScopeMeter. If the response is non-zero,
'the previous command was not correct or was not correctly
'received by the ScopeMeter. Then an error message is
'displayed and the program is aborted.
Acknowledge:
INPUT #1, ACK 'Reads acknowledge from ScopeMeter.
IF ACK <> 0 THEN
PRINT "Error "; ACK; ": ";
SELECT CASE ACK
CASE 1
PRINT "Syntax Error"
CASE 2
PRINT "Execution Error"
CASE 3
PRINT "Synchronization Error"
CASE 4
PRINT "Communication Error"
CASE IS < 1
PRINT "Unknown Acknowledge"
CASE IS > 4
PRINT "Unknown Acknowledge"
END SELECT
PRINT "Program aborted."
END
END IF
RETURN
'****************** End example program ******************
Page 3.23
=============================================================
IDENTIFICATION ID
-------------------------------------------------------------
Purpose:
Returns the ScopeMeter model identification information.
Command Syntax:
ID
Response Syntax:
[]
where,
is an ASCII string containing the following
data elements:
;;
;
Example:
The following example program queries the identity data of
the ScopeMeter and displays this data on the PC
screen.
' Page 3.24
'***************** Begin example program *****************
CLS 'Clears the PC screen.
OPEN "COM1:1200,N,8,1,CS,DS,RB2048" FOR RANDOM AS #1
PRINT #1, "ID" 'Sends IDENTIFICATION query.
GOSUB Acknowledge 'Input acknowledge from ScopeMeter.
INPUT #1, IDENT$ 'Inputs the queried data.
PRINT IDENT$ 'Displays queried data.
CLOSE #1
END
'**************** Acknowledge subroutine ******************
'Use this subroutine after each command or query sent to the
'ScopeMeter. This routine inputs the acknowledge
'response from the ScopeMeter. If the response is non-zero,
'the previous command was not correct or was not correctly
'received by the ScopeMeter. Then an error message is
'displayed and the program is aborted.
Acknowledge:
INPUT #1, ACK 'Reads acknowledge from ScopeMeter.
IF ACK <> 0 THEN
PRINT "Error "; ACK; ": ";
SELECT CASE ACK
CASE 1
PRINT "Syntax Error"
CASE 2
PRINT "Execution Error"
CASE 3
PRINT "Synchronization Error"
CASE 4
PRINT "Communication Error"
CASE IS < 1
PRINT "Unknown Acknowledge"
CASE IS > 4
PRINT "Unknown Acknowledge"
END SELECT
PRINT "Program aborted."
END
END IF
RETURN
'****************** End example program ******************
Page 3.25
=============================================================
INSTRUMENT STATUS IS
-------------------------------------------------------------
Purpose:
Queries the contents of the ScopeMeter's status register.
The returned value reflects the present operational status
of the ScopeMeter. This is a 16-bit word, presented as an
integer value, where each bit represents the Boolean value
of a related event.
Command Syntax:
IS
Response Syntax:
[]
where,
= integer value 0 to 65535
Bit Value Status Description
----------------------------------------------------------
0 1 Maintenance mode
1 2 Charging
2 4 Recording
3 8 AutoRanging
4 16 Remote
5 32 Battery Connected
6 64 Power (Net) Adapter connected
7 128 Calibration necessary
8 256 Instrument Held (HOLD status)
9 512 Pre Calibration busy
10 1024 Pre Calibration valid
11 2048 Replay buffer full
12 4096 Triggered
13 8192 Instrument On
14 16384 Instrument Reset occurred
15 32768 Next value available
Example:
Page 3.26
'***************** Begin example program *****************
CLS 'Clears the PC screen
OPEN "COM1:1200,N,8,1,CS,DS,RB2048" FOR RANDOM AS #1
PRINT #1, "IS" 'Sends the INSTRUMENT STATUS query
GOSUB Acknowledge 'Input acknowledge from ScopeMeter
INPUT #1, Status$ 'Input Instrument Status
StV = VAL(Status$) 'Decimal value of Instrument Status
PRINT "Instrument Status : "; StV
IF (StV AND 1) = 1 THEN PRINT " ScopeMeter in Maintenance mode."
IF (StV AND 2) = 2 THEN PRINT " ScopeMeter charging."
IF (StV AND 4) = 4 THEN PRINT " ScopeMeter recording."
IF (StV AND 8) = 8 THEN PRINT " AutoRanging active"
IF (StV AND 16) = 16 THEN PRINT " ScopeMeter remote."
IF (StV AND 32) = 32 THEN PRINT " Battery connected."
IF (StV AND 64) = 64 THEN PRINT " Power Adapter connected."
IF (StV AND 128) = 128 THEN PRINT " Calibration necessary."
IF (StV AND 256) = 256 THEN PRINT " ScopeMeter in HOLD."
IF (StV AND 512) = 512 THEN PRINT " Pre-calibration busy."
IF (StV AND 1024) = 1024 THEN PRINT " Pre-calibration valid."
IF (StV AND 2048) = 2048 THEN PRINT " Replay-buffer full."
IF (StV AND 4096) = 4096 THEN PRINT " ScopeMeter triggered."
IF (StV AND 8192) = 8192 THEN
PRINT " ScopeMeter On."
ELSE
PRINT " ScopeMeter Off."
END IF
IF (StV AND 16384) = 16384 THEN PRINT " Reset Instrument occurred."
END
'
' Page 3.27
'**************** Acknowledge subroutine ******************
'Use this subroutine after each command or query sent to the
'ScopeMeter. This routine inputs the acknowledge
'response from the ScopeMeter. If the response is non-zero,
'the previous command was not correct or was not correctly
'received by the ScopeMeter. Then an error message is
'displayed and the program is aborted.
Acknowledge:
INPUT #1, ACK 'Reads acknowledge from ScopeMeter.
IF ACK <> 0 THEN
PRINT "Error "; ACK; ": ";
SELECT CASE ACK
CASE 1
PRINT "Syntax Error"
CASE 2
PRINT "Execution Error"
CASE 3
PRINT "Synchronization Error"
CASE 4
PRINT "Communication Error"
CASE IS < 1
PRINT "Unknown Acknowledge"
CASE IS > 4
PRINT "Unknown Acknowledge"
END SELECT
PRINT "Program aborted."
END
END IF
RETURN
'****************** End example program ******************
Page 3.28
=============================================================
PROGRAM COMMUNICATION PC
-------------------------------------------------------------
Purpose:
Programs the baud rate for RS232 communication:
Command Syntax:
PC
where,
= 1200|2400|4800|9600|19200
38400 (Fluke 19xC)
57600 (Fluke 19xC, PM9080/101 required)
The default baudrate is 1200. This is set at power-on or
after a Reset Instrument command (command "RI")
Notes:
The Fluke 19x/19xC instruments support 1 stopbit,
8 databits and software handshake (X-on X-off
protocol).
Hardware handshaking is not supported.
Page 3.29
Response Syntax:
See an example for this command under QUERY PRINT (QP).
Page 3.30
=============================================================
PROGRAM SETUP PS
-------------------------------------------------------------
Purpose:
Restores a complete setup, previously saved with the SS
(Save Setup) command and queried with the QS (Query Setup)
command and saved in a string variable or to a file.
-> -> ->
Command Syntax 1:
PS []
where,
= 0 : Actual setup
Response Syntax 1:
Command Syntax 2:
= The data returned with the QS command.
(omit the response).
Response Syntax 2:
Note: Wait for at least two seconds after the
reply has been received, to let
the ScopeMeter settle itself before you send the
next command.
Remarks:
The ScopeMeter sends the reply
after it has executed the setup from the PS command.
You must send the string as a whole, exactly as
returned from the QS (Query Setup) command.
If you do not follow this rule, the ScopeMeter
may crash. A Reset may then be necessary to recover
the ScopeMeter. (Refer to the ScopeMeter Users Manual.)
Example:
The following example program demonstrates the use of the
QS (QUERY SETUP) and the PS (PROGRAM SETUP) commands.
The present setup is queried from ScopeMeter and saved to
file. The program asks you to change the ScopeMeter settings.
Then the original setup is read from file and sent back
to the ScopeMeter.
' Page 3.31
'***************** Begin example program *****************
OPEN "COM1:1200,N,8,1,CS,DS,RB2048" FOR RANDOM AS #1
CLS
GOSUB ClearPort 'Clears pending data from port.
PRINT #1, "QS" 'Queries the actual setup data.
GOSUB Acknowledge 'Input acknowledge from ScopeMeter.
GOSUB Response 'Writes the setup data to file.
PRINT "Present setup data are stored in the file SETUP0"
PRINT "This setup will now be retrieved from the file and"
PRINT "sent back to the ScopeMeter."
PRINT "To see if this works, change the present settings and"
PRINT "verify if the ScopeMeter returns to the previous"
PRINT "settings."
PRINT
PRINT "Press any key on the PC keyboard to continue."
SLEEP
CLS
PRINT #1, "PS" 'Program header for programming
'the setup data to the ScopeMeter.
GOSUB Acknowledge 'Input acknowledge from ScopeMeter.
OPEN "SETUP0" FOR INPUT AS #2
'Opens file SETUP0 for data retrieval.
DO WHILE NOT EOF(2)
SUCHR$ = INPUT$(1, #2) 'Reads setup data from file
PRINT #1, SUCHR$; 'Programs ScopeMeter with the"
'setup data stored in SETUP0$.
LOOP
PRINT #1, CHR$(13); 'Program message terminator
CLOSE #2 'Close file SETUP0.
GOSUB Acknowledge 'Input acknowledge from ScopeMeter.
END
'
' Page 3.32
'**************** Acknowledge subroutine ******************
'Use this subroutine after each command or query sent to the
'ScopeMeter. This routine inputs the acknowledge
'response from the ScopeMeter. If the response is non-zero,
'the previous command was not correct or was not correctly
'received by the ScopeMeter. Then an error message is
'displayed and the program is aborted.
Acknowledge:
INPUT #1, ACK 'Reads acknowledge from ScopeMeter.
IF ACK <> 0 THEN
PRINT "Error "; ACK; ": ";
SELECT CASE ACK
CASE 1
PRINT "Syntax Error"
CASE 2
PRINT "Execution Error"
CASE 3
PRINT "Synchronization Error"
CASE 4
PRINT "Communication Error"
CASE IS < 1
PRINT "Unknown Acknowledge"
CASE IS > 4
PRINT "Unknown Acknowledge"
END SELECT
PRINT "Program aborted."
END
END IF
RETURN
'******* Clears pending data from the RS232 port *********
ClearPort:
WHILE LOC(1) > 0
Dummy$ = INPUT$(1, #1)
WEND
RETURN
'
' Page 3.33
'****************** Response subroutine *********************
'This subroutine reads bytes from the RS232 buffer as long
'as they enter. When no bytes enter for 1 second, the program
'assumes that the ScopeMeter has terminated its response.
'All bytes that enter the buffer are appended to the string
'Resp$.
Response:
start! = TIMER
'Wait for bytes (maximum 1 s) to enter RS232 buffer
WHILE ((TIMER < (start! + 1)) AND (LOC(1) = 0))
WEND
IF LOC(1) > 0 THEN 'If RS232 buffer contains bytes
OPEN "Setup0" FOR OUTPUT AS #2 'File for setup data
DO
' LOC(1) gives the number of bytes waiting:
ScopeInput$ = INPUT$(LOC(1), #1) 'Input bytes
PRINT #2, ScopeInput$;
start! = TIMER
WHILE ((TIMER < (start! + 1)) AND (LOC(1) = 0))
WEND
LOOP WHILE LOC(1) > 0 'Repeat as long as bytes enter
CLOSE #2
END IF
RETURN
'****************** End example program ******************
Page 3.34
=============================================================
QUERY MEASUREMENT QM
-------------------------------------------------------------
Purpose:
Queries for active readings (see Syntax 1) or measurement
results from the ScopeMeter (see Syntax 2).
Command Syntax 1:
QM
Command Syntax 2:
QM {,}
where in TrendPlot mode, **************************
= 11 | 21 *
*
where in Meter mode, **************************** *
= 11 | 19 * *
* *
where in Scope mode, ************************** * *
= 11 | 21 | 31 | 41 | * * *
53 | 54 | 55 | 61 | 71 * * *
* * *
MEASUREMENT TYPE / DESCRIPTION * * *
* * *
11 Measurement reading 1 |*| |*|
Meter absolute reading | |*| |
19 Meter relative reading (relative to | |*| |
instrument setup reference value) | | | |
21 Measurement reading 2 |*| |*|
31 Cursor 1 absolute amplitude value |*| | |
41 Cursor 2 absolute amplitude value |*| | |
53 Cursor absolute amplitude value (Maximum) |*| | |
54 Cursor absolute amplitude value (Average) |*| | |
55 Cursor absolute amplitude value (Minimum) |*| | |
61 Cursor relative amplitude value (Delta) |*| | |
71 Cursor relative time value (delta T) |*| | |
Notes: - Maximum 10 readings per command.
- If one of the readings is non-valid, no readings
will be returned.
- Only active (valid) readings will be returned.
Page 3.35
Response Syntax 1:
[{,}]
where,
= ,,,,,, see Command Syntax 2
validity of the reading:
1 reading valid
0 reading non-valid
source of the reading:
1 Voltage channel: Input A (Scope mode)
2 Ampere channel: Input B (Scope mode)
3 Input external: COM & V/Ohm/Diode (Meter mode)
12 Input_AB (Phase A over B): A>B (Scope mode),
or M (Mathematics A+B, A-B or AxB)
21 Input_BA (Phase B over A): B>A (Scope mode)
unit of the reading:
0 None (off)
1 Volt
2 Ampere
3 Ohm
4 Watt
5 Farad
6 Kelvin
7 seconds
8 hours
9 days
10 Hertz
11 Degrees
12 Celsius
13 Fahrenheit
14 percentage (%)
15 dBm 50 Ohm
16 dBm 600 Ohm
17 dBVolt
18 dBAmpere
19 dBWatt
20 Volt * Ampere Reactive (VAR)
21 Volt * Ampere (VA)
reading characteristic of the measurement:
0 None
1 Mean
2 Rms
3 True rms
4 Peak peak
5 Peak maximum
6 Peak minimum
7 Crest factor
8 Period
9 Duty cycle negative
10 Duty cycle positive
11 Frequency
12 Pulse width negative
13 Pulse width positive
14 Phase
15 Diode
16 Continuity
18 Reactive Power
19 Apparent Power
20 Real Power
21 Harmonic Reactive Power
22 Harmonic Apparent Power
23 Harmonic Real Power
24 Harmonic rms
25 Displacement Power Factor
26 Total Power Factor
27 Total Harmonic Distortion
28 Total Harmonic Distortion with respect
to Fundamental
29 K Factor (European definition)
30 K Factor (US definition)
31 Line Frequency
32 Vac PWM or Vac+dc PWM
33 Rise time
34 Fall time
presentation value of the reading:
0 Absolute value
1 Relative value
2 Logarithmic value
3 Linear value
4 Fahrenheit
5 Celsius
resolution of the reading as to
determine the least significant digit
Response Syntax 2:
[{,}]
where,
= []E
Notes: Only displayed results are available for output.
Not all readings are available in all Fluke 19x/19xC
models/versions.
Page 3.36
Example:
'***************** Begin example program *****************
CLS 'Clears the PC screen.
OPEN "COM1:1200,N,8,1,CS,DS,RB2048" FOR RANDOM AS #1
PRINT #1, "QM" 'Queries for active readings
GOSUB Acknowledge 'Input acknowledge from ScopeMeter.
'*** Examines only the 7 inputs of the first reading 11.
INPUT #1, reading.no '1st
IF reading.no = 11 THEN
PRINT "Measurement reading 1";
ELSEIF reading.no = 21 THEN
PRINT "Measurement reading 2";
ELSE
PRINT "Unknown measurement reading";
END IF
INPUT #1, validity '2nd
IF validity = 1 THEN
PRINT " is valid"
ELSE
PRINT " is 'not' valid"
END IF
INPUT #1, source '3rd
PRINT "Source of reading = ";
IF source = 1 THEN
PRINT "Voltage channel Input A"
ELSEIF source = 2 THEN
PRINT "Ampere channel Input B"
ELSEIF source = 3 THEN
PRINT "Input External"
ELSE
PRINT "Unknown source?"
END IF
INPUT #1, unit '4th
PRINT "Unit of reading = ";
IF unit = 1 THEN
PRINT "Volt"
ELSEIF unit = 2 THEN
PRINT "Ampere"
ELSEIF unit = 3 THEN
PRINT "Ohm"
ELSE
PRINT "Unexpected unit?"
END IF
INPUT #1, types '5th
PRINT "Type of reading = ";
IF types = 1 THEN
PRINT "Mean value"
ELSEIF types = 2 THEN
PRINT "Rms value"
ELSEIF types = 3 THEN
PRINT "True rms value"
ELSE
PRINT "Unexpected characteristic?"
END IF
INPUT #1, presentation '6th
PRINT "Presentation of reading= ";
IF presentation = 0 THEN
PRINT "Absolute value"
ELSEIF presentation = 1 THEN
PRINT "Relative value"
ELSEIF presentation = 2 THEN
PRINT "Logarithmic value"
ELSE
PRINT "Unexpected value?"
END IF
INPUT #1, resolution '7th
PRINT "Resolution of reading ="; resolution
GOSUB ClearReadings 'Clears rest of readings data from port
'
PRINT #1, "QM 11" 'Queries Measurement reading 1 or
'Meter absolute reading (Meter mode).
GOSUB Acknowledge 'Input acknowledge from ScopeMeter.
INPUT #1, result
PRINT "Measurement value ="; result; "V"
CLOSE #1
END
'
' Page 3.37
'**************** Acknowledge subroutine ******************
'Use this subroutine after each command or query sent to the
'ScopeMeter. This routine inputs the acknowledge
'response from the ScopeMeter. If the response is non-zero,
'the previous command was not correct or was not correctly
'received by the ScopeMeter. Then an error message is
'displayed and the program is aborted.
Acknowledge:
INPUT #1, ACK 'Reads acknowledge from ScopeMeter.
IF ACK <> 0 THEN
PRINT "Error "; ACK; ": ";
SELECT CASE ACK
CASE 1
PRINT "Syntax Error"
CASE 2
PRINT "Execution Error"
CASE 3
PRINT "Synchronization Error"
CASE 4
PRINT "Communication Error"
CASE IS < 1
PRINT "Unknown Acknowledge"
CASE IS > 4
PRINT "Unknown Acknowledge"
END SELECT
PRINT "Program aborted."
END
END IF
RETURN
'******* Clears pending data from the RS232 port *********
ClearReadings:
WHILE LOC(1) > 0
LINE INPUT #1, dummy$
WEND
RETURN
'****************** End example program ******************
Page 3.38
=============================================================
QUERY PRINT QP
-------------------------------------------------------------
Purpose:
Queries a screen dump of the ScopeMeter in different
printer formats. This allows you to make a copy of the
ScopeMeter screen on paper. Format ratios:
1 : 1 = width x height = 240 x 240
4 : 3 = width x height = 320 x 240
Command Syntax:
QP[ ,[,]]
where,
= 0 Always zero
= 0 Epson FX, LQ compatible
Returns screen image 1:1 (Fluke 19x)
Returns screen image 4:3 (Fluke 19xC)
1 Laser Jet
Returns screen image 4:3 (Fluke 19x)
2 Desk Jet
Returns screen image 4:3 (Fluke 19x)
3 PostScript
Returns screen image 4:3 (Fluke 19x)
11 PNG format ( mandatory)
Returns screen image 4:3 (Fluke 19xC)
= b binary format
B Binary format
Note: Sending QP without arguments returns the screen image
in Epson format (i.e., this command is equivalent to
QP 0,0).
Response Syntax for QP or QP 0,0 or QP 0,1 or QP 0,2 or QP 0,3:
[]
This data can be sent directly to the printer
to get a hard copy of the screen on paper.
Page 3.39
Example for QP 0,0 (or QP or QP 0,1 or QP 0,2 or QP 0,3):
The following program reads the ScopeMeter screen (print)
data and copies this data to the file Qpfile. This file can be
copied to the printer port LPT1, for example.
The Read Buffer length for the PC is set to 7500 bytes to
prevent buffer overflow during input from the ScopeMeter.
The communication speed (baud rate) is set to 19200 and after
the data transfer it is reset to 1200 (default baud rate).
'***************** Begin example program *****************
CLS
OPEN "COM1:1200,N,8,1,CS,DS,RB7500" FOR RANDOM AS #1
'Programs COM1 port parameters to
'match with the ScopeMeter power-on
'defaults.
PRINT #1, "PC 19200" 'Programs ScopeMeter to the maximum
'baud rate.
GOSUB Acknowledge 'Input acknowledge from ScopeMeter.
CLOSE #1
OPEN "COM1:19200,N,8,1,CS,DS,RB7500" FOR RANDOM AS #1
'Programs COM1 port parameters to
'match with the new ScopeMeter
'settings.
PRINT #1, "QP 0,0" 'Sends QUERY PRINT data command.
'(actual screen for EPSON print)
GOSUB Acknowledge 'Input acknowledge from ScopeMeter.
PRINT
PRINT "Busy reading print data !"
PRINT
GOSUB Response
PRINT #1, "PC 1200" 'Programs ScopeMeter back to the
'default baud rate.
GOSUB Acknowledge 'Input acknowledge from ScopeMeter.
PRINT "Print data copied to file 'QPFILE'."
PRINT "You can copy the file contents to the EPSON Printer."
PRINT "DOS-example: COPY Qpfile LPT1"
CLOSE 'Close all files.
END
'**************** Acknowledge subroutine ******************
'Use this subroutine after each command or query sent to the
'ScopeMeter. This routine inputs the acknowledge
'response from the ScopeMeter. If the response is non-zero,
'the previous command was not correct or was not correctly
'received by the ScopeMeter. Then an error message is
'displayed and the program is aborted.
Acknowledge:
INPUT #1, ACK 'Reads acknowledge from ScopeMeter.
IF ACK <> 0 THEN
PRINT "Error "; ACK; ": ";
SELECT CASE ACK
CASE 1
PRINT "Syntax Error"
CASE 2
PRINT "Execution Error"
CASE 3
PRINT "Synchronization Error"
CASE 4
PRINT "Communication Error"
CASE IS < 1
PRINT "Unknown Acknowledge"
CASE IS > 4
PRINT "Unknown Acknowledge"
END SELECT
CLOSE 'Close all files.
PRINT "Program aborted."
END
END IF
RETURN
'****************** Response subroutine *********************
'This subroutine reads bytes from the RS232 buffer as long
'as they enter. When no bytes enter for 1 second, the program
'assumes that the ScopeMeter has terminated its response.
'All bytes that enter the buffer are appended to the string
'Resp$.
Response:
start! = TIMER
'Wait for bytes (maximum 2 s) to enter RS232 buffer
WHILE ((TIMER < (start! + 2)) AND (LOC(1) = 0))
WEND
IF LOC(1) > 0 THEN 'If RS232 buffer contains bytes
Resp$ = ""
OPEN "Qpfile" FOR OUTPUT AS #2 'File for print data
DO
' LOC(1) gives the number of bytes waiting:
ScopeInput$ = INPUT$(LOC(1), #1) 'Input bytes
PRINT #2, ScopeInput$;
start! = TIMER
WHILE ((TIMER < (start! + 2)) AND (LOC(1) = 0))
WEND
LOOP WHILE LOC(1) > 0 'Repeat as long as bytes enter
CLOSE #2
END IF
RETURN
'****************** End example program ******************
Page 3.40
Response Syntax for QP 0,11,b or QP 0,11,B:
,
where,
= {}
This field indicates the total number of
bytes in the .
= {}
= #0 =
When the most significant bit (bit 7) is set,
this block (segment) is the last one in the
sequence.
=
Specifies the number of 's
that follow in the field.
= {}
Part of the graphics (PNG) data.
=
One binary character which represents the sum
of all the 's sent after
the and before the .
The is sent in blocks (segments). When the
parts of all 's are concatenated, they form a PNG-format
graphics file of length bytes.
The instrument has to be prompted for every block (segment):
Command syntax for block transfer:
where,
= 0 Continue: Request the next segment.
1 Retransmit: Request retransmission
of the just transferred segment.
2 Terminate: Abort block transfer for
this QP command.
The PNG format is specified in: "PNG (Portable Network Graphic
