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Operating Instructions
53
Table 3-7 GP-IB Commands (continued)
Command
*Range or **Response
To Query Description
Page
UNMASK? **UNMASK xxx
Used to read which bits in the status register have
been enabled to set bits in the fault register
(i.e.,which power supply conditions are defined as
faults). xxx is decoded using bit weights in Table
3-9.
62
FAULT? **FAULT xxx Used to read which bits have been set in the fault
register. A bit is set in the fault register when the
corresponding bit in the status register changes
from inactive to active AND the corresponding
bit in the mask register is set. Bits in the fault
register are reset only after the fault register is
read. xxx is decoded using bit weights in Table 3-
9.
62
SRQ OFF
SRQ 0
SRQ ON
SRQ 1
Enable or disable power supply’s ability to request
service from the controller for fault conditions.
UNMASK command defines which power supply
conditions are defined as faults. Initial Condition:
SRQ OFF
62
SRQ? **SRQ 0 or
**SRQ 1
Used to read SRQ setting. 63
CLR Used to initialize power supply to power-on state;
also resets the PON bit in the serial poll register.
The device clear interface message performs the
same function.
63
ERR? **ERR xx Used to determine type of programming error
detected by power supply. A remote programming
error will set the ERR bit in the status register,
which can be enabled by UNMASK to request
service. See Table 3-10 for descriptions of error
codes.
63