Language Dictionary - 4
Command Syntax | *SRE <NRf> |
Parameters | 0 to 255 |
see *PSC | |
Example | *SRE 20 |
Query Syntax | *SRE? |
Returned Parameters | <NR1> (register binary value) |
Related Commands | *ESE *ESR *PSC |
CAUTION: If *PSC is programmed to 0, the *SRE command causes a write cycle to nonvolatile memory. Nonvolatile memory has a finite maximum number of write cycles. Programs that repeatedly cause write cycles to nonvolatile memory can eventually exceed the maximum number of write cycles and cause the memory to fail.
*STB?
This query reads the Status Byte register, which contains the status summary bits and the Output Queue MAV bit. Reading the Status Byte register does not clear it. The input summary bits are cleared when the appropriate event registers are read. The MAV bit is cleared at
A serial poll also returns the value of the Status Byte register, except that bit 6 returns Request for Service (RQS) instead of Master Status Summary (MSS). A serial poll clears RQS, but not MSS. When MSS is set, it indicates that the has one or more reasons for requesting service.
Table
Bit Position | 7 | 6 |
Bit Name | OPER | MSS |
|
| (RQS) |
Bit Weight | 128 | 64 |
ESB = Event status byte summary MAV = Message available
MSS = Master status summary
5
ESB
32
4 | 3 | 2 | 1 |
MAV | QUES | 0 | 0 |
|
|
|
|
16 | 8 | 4 | 2 |
OPER = Operation status summary QUES = Questionable status summary RQS = Request for service
0
0
1
Query Syntax *STB?
Returned Parameters <NR1>(Register binary value)
*WAI
This command instructs the dc source not to process any further commands until all pending operations are completed. "Pending operations" are as defined under the *OPC command. *WAI can be aborted only by sending the dc source an GPIB DCL (Device Clear) command.
Command Syntax WAI?
Parameters None
Related Commands *OPC*OPC?
67
