9
When the controller conducts a serial poll in response to SRQ, the RQS bit is cleared, but the MSS bit is not. When
*SRE is cleared (by programming it with 0), the electronic load cannot generate an SRQ to the controller. The query
returns the current state of *SRE.
Command Syntax
*SRE <NRf>
Parameters
0 to 255
Default Value
see *PSC
Example
*SRE 128
Query Syntax
*SRE?
Query Response
<NR1> (register binary value) 0-255
Related Commands
*ESE *ESR *PSC
1.11 *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 (see chapter “Programming the Status Registers” for more information). 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 electronic load has one or more
reasons for requesting service.
Query Syntax
*STB?
Parameters
None
Query Response
<NR1> (register value)
Related Commands
*SRE *ESR *ESE
1.12 *TST?
This command causes the electronic load to do a self-test and report any error.
Command Syntax
TST?
Parameters
None
Query Response
<NR1> 0 indicates the electronic load has passed selftest. Non-zero indicates an error code(see
appendix C)
