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Page 27
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Appendix C
D395-90-880 Issue E
Appendix C
RS232 Queries
In the lists that follow:
x
refers to gauge channel and is in the range 1..2
pressure
is in exponential format m.mmEsee where m is the mantissa,
s the sign (+ or -) and e is the exponent (2 digits).
?CH x
Returns the set point high threshold for relay x as a pressure in the currently selected units.
Example:
?CH1
Reply:
5.50E-03
?CL x
Returns low set point the threshold for relay x as a pressure in the currently selected units.
Example: ?CL2
Reply:
1.00E+02
?GA x
Returns the current pressure reading for gauge channel x. If the current units are volts then the voltage will be
returned. If the gauge is switched off or has an error then an error number will be returned. Refer to
for
a description of error numbers.
Example:
?GA1
Reply:
3.20E-05
?GV x
Returns the gauge version for channel x, as a number. The number is the same as the ID number indicated on the
display when a gauge is first connected.
Example:
?GV1
Reply:
00 = No gauge
04 = APG-M
05 = APG-L
06 = APGX-H
11 = AIM-S
15 = ASG
19 = AIM-X
20 = WRG
21 = APGX-M / APGX-L
?RCx
Returns the gauge number currently assigned to relay x. Only relay 2 can be configured, any other value will produce
an error message.
Example:
?RC2
Reply:
1
?TH
Returns the link high threshold as a pressure in the currently seleted units.
Example:
?TH
Reply:
1.3E-03
?TL
Returns the link low threshold as a pressure in the currently seleted units.
Example:
?TL
Reply:
1.0E-03
