EXFO PM-1100 Optical Power Meter - Manual (Page 54)

Controlling Your Optical Power Meter Remotely
44 PM-1100
Standard Status Data Structure
Standard Status Data Structure
The figure shown hereafter illustrates the four common status and enable
registers as defined by IEEE 488.2. This diagram is a useful aid in
understanding the general commands and how a service request (SRQ) is
generated. The four registers are
³
Standard Event Status Register (ESR)
³
Standard Event Status Enable Register (ESE)
³
Status Byte Register (STB)
³
Service Request Enable Register (SRE)
Bit ESR ESE STB SRE
0 Operation
Complete
Operation
Complete
N/A N/A
1 Request Control Request Control N/A N/A
2 Query Error Query Error Error Bit Error Summary Bit
3 Device Dependent
Error
Device Dependent
Error
Questionable
Status
Questionable
Status
4 Execution Error Execution Error Message Available Event Status
Summary Bit
5 Command Error Command Error Event Status
Summary Bit
Message Available
6 User Request User Request Master Summary
Status
Request Service /
Master Summary
Status
7 Power On Power On Operation Status Operation Status