Colby Instruments PDL-100A - Rel? Relay Query

Chapter 6 System Commands
© 2010 Colby Instruments. PDL-100A Operating and Programming Manual Page 56
REL? RELAY QUERY
The REL? query asks for the status of all relays, 16 (far left)
through 1 (far right).
Command
Syntax
REL?
Example
REL?
Returns
<ASCII text><NL>
0001000000101011, X.YYYY ns
0 = Relay OFF
1 = Relay ON
X.YYYY ns = total delay
Programming
Example
HP : OUTPUT 705;"REL?"<NL>
ENTER 705;REL$
PRINT (REL$)
NI: DIM QUERY_RESPONSE As Variant
CWGPIB.Write “REL?”
QUERY_RESPONSE = CWGPIB.Read(250)
MsgBox (“Relay status is:” & QUERY_RESPONSE)
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