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Operation
GPIB Operation
Service
Service request is a uniline message asserted by the power supply at power on and
Request
for fault conditions. Ten (10) power supply conditions are defined as faults: CV, CC,
OV, OTP, SD, FOLD, ERR, ACF, OPF, and SNSP. See "Accumulated Status, Status,
and Fault Registers" on page 46 for more information. Power ON (PON) can also be
flagged in the fault register if the supply's rear panel power on service request
(PON SRQ) switch is set to ON. See "Power On Service Request (PON SRQ)" on
page 21.
Enabling or disabling a condition from asserting service request does not affect the
condition within the power supply, nor the external status indicators.
Serial Poll In a serial poll, the controller polls each device.
Example:
ibrsp
The power supply responds with a 8-bit status byte defined as follows:
Table 3.2 Serial Poll Status Register
Bit
Position
0 (LSB)
1
2
3
4
5
6
7 (MSB)
32
Return serial poll byte.
Decimal
Description
Weight
1
Fault - Set when any bit in the fault
register is set by a fault condition in the
supply. See also
Status, Status, and Fault Registers"
on page 46
.
2
Not used
4
Not used
8
Not used
16
Ready - Set when power supply is
ready to accept commands.
32
Error (ERR) - Set when ERR bit
asserted in status register. See also
"Accumulated Status, Status, and
Fault Registers" on page 46
64
Request Service (SRQ) - Set when
power supply requests service.
128
Power On (PON) - Set when unit
initializes at power on.
Operating Manual for GPIB for XHR/XFR Series Power Supply
"Accumulated
.
Reset By
FAULT? query to reset
Power supply, during
command processing
period
ERR? query
Serial Poll
CLR or Device Clear
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