RS-232 Messages
Chapter Six: RS-232 Communications Option
90
Global Messages
The Global messages, listed in Table 21, do not use the <id> entry, however you must enter a ‘0’
in the <id> entry field to complete the message string. The table lists the <data> entry for a
command and a request.
@parameter 0 data
ENTER
Global Messages
Parameter Entry
Action
Data for a Command
Data for a Request
00
Active Channel
0 = Channel 1
1 = Channel 2
2 = Channel 3
‘?’
01
Mode
0 = Pressure
1 = Zero
2 = Null
3 = Full Scale
4 = System Check
‘?’
02
Report Reading
Request Only
‘?’
03
Calibrate Mode
None
Command Only
04
Enable RS-232
Averaging
0 = No
1 = Yes
‘?’
Table 21: RS-232 Global Messages
Example 1: How To Set the Active Channel
1. To set the active channel to Channel 2 (with a 274 multiplexer connected), send the
command:
@0001
ENTER
The 670 instrument will return the same command to indicate that the command was
accepted and implemented. In addition, it will illuminate the light in the [Ch 2] key.
Example 2: How To Request the Pressure Reading
1. Issue the following command to set the 670 instrument in the pressure reading mode:
@0100
ENTER
2. To request the pressure reading issue the following query:
@020?
ENTER
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