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Standard Commands for Programmable Instruments (SCPI)
105
Table C-5. Bit Configuration of Status Reister Groups
Bit Signal Meaning
Operation Status Group
5 WTG The interface is waiting for a trigger
8 CV The power supply is in the positive constant-voltage mode
10 CC The power supply is sourcing current in the constant-current mode
Questionable Status Group
0 OV The power supply overvoltage protection circuit has tripped
1 OC The power supply overcurrent protection circuit has tripped
4 OT The power supply has an overtemperature condition
9 RI The power supply remote inhibit status is active
10 UNR The power supply output is unregulated
Standard Event Status Group
0 OPC Operation complete
2 QYE Query error
3 DDE Device-dependent error
4 EXE Execution error
5 CME Command error
7PON Power on
Status Byte and Service Request Enable Registers
3 QUES Questionable status byte summary
4 MAV Message available
5 ESB Event status byte summary
6 MSS Master status summary
RQS Request for service
7 OPER Operation status byte summary
Status Programming Examples. Table C-3 shows four examples that set the Questionable Status register group bits to
enable specific conditions. Refer also to Figure C-4.
NOTE PTR and NTR Filter programming is shown for consistency. In many cases, the default filter values make
programming them unnecessary.
Operation Status Group
Register Functions.
The Operation Status registers record signals that are part of the power supply’s normal operation. As
shown in Figure C-4, the group consists of a set of registers similar to the Questionable Status group. The output of the
Operation Status group is logically-ORed into the OPER(ation) summary bit (7) of the Status Byte register.
Register Programming. Programming for this group is derived from the STAT:OPER commands (Table C-4).