5.4 Device Message
5-19
(1) Standard event status register
Standard event status enable register
Standard event status register
7
6
Logical OR
5
4
3
2
1
0
7
6
5
4
3
2
1
0
&
&
&
&
&
&
&
&
Status byte register
Set to ESB bit
Operation completed
Bus control-right request
Query error
Device dependent error
Execution error
Command error
User request
Power on
Bit Event name Description
7 Power on Set when power supply status is changed from Off to On.
6 User request
Set to send user request to the controller.
Always 0 on the MP8931A.
5 Command error
(1) Set when syntax error is detected.
(2) Set when message not supported by the MP8931A is re-
ceived.
(3) Set when GET is detected during message reception.
4 Execution error
(1) Set when command exceeding setting range is received.
(2) Set when the MP8931A is not in a status capable of mes-
sage execution.
(3) Set when using GPIB or RS-232C.
3
Device dependent er-
ror
Set when an error except command error, execution error or
query error is detected.
2 Query error
(1) Set when readout is executed while output queue is emp-
ty.
(2) Set when output queue overflows.
1
Bus control-right re-
quest
Sets when requesting to be the controller.
Always 0 on the MP8931A.
0 Operation completed
Set when the *OPC command is received in a status capable
of receiving new message.
The MP8931A does not have overlap command, so always sets
1 when the *OPC command is received.
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