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Operation
GPIB Operation
32
Operating Manual for GPIB for XPD Series Power Supply
Serial Poll
In a serial poll, the controller polls each device.
Example:
The power supply responds with a 8-bit status byte defined as follows:
Table 3.2
Serial Poll Status Register
ibrsp
Return serial poll byte.
Bit
Position
Decimal
Weight
Description
Reset By
0 (LSB)
1
Fault
- Set when any bit in the fault
register is set by a fault condition in the
supply. See also
“Accumulated
Status, Status, and Fault Registers”
on page 46
.
FAULT? query to reset
1
2
Not used
2
4
Not used
3
8
Not used
4
16
Ready
- Set when power supply is
ready to accept commands.
Power supply, during
command processing
period
5
32
Error (ERR)
- Set when ERR bit
asserted in status register. See also
“Accumulated Status, Status, and
Fault Registers” on page 46
.
ERR? query
6
64
Request Service (SRQ)
- Set when
power supply requests service.
Serial Poll
7 (MSB)
128
Power On (PON)
- Set when unit
initializes at power on.
CLR or Device Clear