Standard status data structure – EXFO PM-1600 High-Speed Power Meter User Manual
Page 80
Controlling the PM-1600 Automatically or Remotely
70
PM-1600
Standard Status Data Structure
Standard Status Data Structure
The figures below illustrate the four common Status and Enable registers
as defined by IEEE 488.2. These diagrams are a useful aid in understanding
the general commands and how a service request (SRQ) is generated. The
four registers are
➤
Standard Event Status Register (ESR)
➤
Standard Event Status Enable Register (ESE)
➤
Status Byte Register (STB)
➤
Service Request Enable Register (SRE)
Bit
ESR
ESE
STB
SRE
0
Operation
Complete
Operation
Complete
Source Status
Source Status
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
Controlling the PM-1600 Automatically or Remotely
70
PM-1600
Standard Status Data Structure
Standard Status Data Structure
The figures below illustrate the four common Status and Enable registers
as defined by IEEE 488.2. These diagrams are a useful aid in understanding
the general commands and how a service request (SRQ) is generated. The
four registers are
➤
Standard Event Status Register (ESR)
➤
Standard Event Status Enable Register (ESE)
➤
Status Byte Register (STB)
➤
Service Request Enable Register (SRE)
Bit
ESR
ESE
STB
SRE
0
Operation
Complete
Operation
Complete
Source Status
Source Status
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