Vitrek V4 - Status and Error Reporting

Vitrek V4 – Electrical Safety Tester USER MANUAL
53
7-7. Status and Error Reporting
A set of status registers allows the user to quickly determine the EST’s internal processing status. The
status register, as well as the status and event reporting system, adhere to SCPI recommendations.
The sketch of the status and event reporting system is showed in figure 7. Each component of the sketch
represents a set of registers and queues that can read, report, or enable the occurrence of certain events
within the system. If a specific event in the EST sets a bit in a status register, reading which can tell you
what types of events have occurred. Each bit in the status register corresponds to a bit in an enable
register; the enable bit must be high for the event to be reported to the Status Byte Register. A Service
Request (SRQ) is the last event to occur. The SRQ requests an interrupt on the GPIB to report events to
the system controller.
Status Registers.
There are two kinds of status registers are included to the programmable power supplies.
1. OPERation Status Registers ( CONDition, EVENt, and ENABle)
2. QUEStionable Status Registers (CONDition, EVENt, and ENABle)
The lower level nodes: QUEStionable and OPERation each have three 16 bits registers: CONDition,
EVENt, and ENABle. Figure 8 shows the sequential relationship between these three types of registers
and the commands that relate to each register.
Figure 7: a graphic representation of the status register and its connections.
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QUEStionable Status
0
1
2
3
9
15
14
13
12
11
10
8
7
6
5
4
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OPERation Status
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2
3
0
1
14
13
12
11
10
9
8
7
6
5
4
15
Command Error
Power On
User
Request
Execution Error
Device Dependent
Error
Query Error
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Standard Event Status Registers
Operation Complete
ESB
RQS/MSS
MAV
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Status Byte Register
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Summary of IEEE 488.2 Status Structure Registers
2
3
0
1
7
6
5
4
2
3
0
1
7
6
5
4
E/E
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QUES
OPER
SRQ
Error/Event Queue
Output Queue