TDI-Dynaload Division
WCL488 Series Water Cooled Electronic Loads
Operation & Programming Manual
402828, Rev. B1
Page 79
SRQ Service Request Register
This command provides access to the Service Request register. In
IEEE-488 equipped units the bits in this register define which bits of
the Status Register (STA) will generate a service request. A query
form is provided so the setting can be read back.
The value in this register is a number between 0 and 255 and is the
sum of the individual bit weights as defined below.
Bit
Weight
Description
Text On
Response Message
7
128
Reserved
RESERVED
6
64
Change In Status
STA CHANGE
5
32
Single Shot Complete SINGLE SHOT
COMPLETE
4
16
Command Error
COMMAND ERROR
3
8
Minor Fault
MINOR FAULT
2
4
Major Fault
MAJOR FAULT
1
2
System Minor Fault
SYSTEM MINOR
0
1
System Major Fault
SYSTEM MAJOR
Description
The query form of this command will either return a numeric or a
text response depending on the TEXT ON/OFF setting. The text
response will return a string containing the Text On Response
Message as listed above for each bit that is set. These will be
separated by commas. If no bits are set “ CLEAR” will be returned.
Command Syntax
SRQ <NR1>
Example
SRQ 12
This will write the value of 12 into the SRQ register. This enables
bit 2 (Major Fault) and bit 3 (Minor Fault) in the STA register so
that if either is set a service request will be generated.
Query Syntax
SRQ?
Returned Parameters TEXT ON: <text response string>
TEXT OFF: <NR1>
