Pacific Power Source UPC-1, Operation Manual

Page: 104 / 135

SECTION 5 REMOTE OPERATION
92
5.5.3.1 IEEE-488.2 STATUS REPORTING (cont)
STANDARD EVENT STATUS REGISTER (ESR)
Events reported by the STANDARD EVENT STATUS register may be queried via the
*ESR? command.
Reading the ESR register clears it. The EVENT STATUS summary bit in the STATUS BYTE (STB) will
be set when an unmasked EVENT STATUS bit goes true. Refer to figure 5.2.
BIT NAME DEFINITION
7 PON POWER ON indicates Input power was just applied
6 URQ USER REQUEST indicates "LOCAL" key was just pressed
5 CME COMMAND ERROR indicates invalid command or query received
4 EXE EXECUTION ERROR indicates can't execute command with data received
3 DDE DEVICE DEPENDANT ERROR indicates UPC not properly configured
2 QYE QUERY ERROR indicates cannot respond with data
1 RQC REQUEST CONTROL - not used
0 OPC OPERATION COMPLETE indicates previous operation complete
Setting an EVENT STATUS ENABLE (ESE) bit true unmasks the EVENT bit in the ESR. Also see
:SYSTem:ERRor? query for corresponding information.
3
DDE
3
DDE
&
PON
7
URQ
6
EXE CME
5
4
&
&
PON
&
7
&
URQ
6
EXE CME
5 4
*ESE <NRf>
&
QYE
2
&
RQC
1
&
*ESE?
OPC
0
QYE
2
RQC
1
OPC
0
*ESR?
FIGURE 5.2 STANDARD EVENT REGISTER MODEL
STANDARD
EVENT STATUS
REGISTER
STANDARD
EVENT STATUS
ENABLE
REGISTER
SUMMARY
MESSAGE
EVENT
SUMMARY
BIT
(BIT 5 OF
STATUS
BYTE
REGISTER)
L
O
G
I
C
A
L
O
R
POWER ON
USER REQUEST
COMMAND ERROR
EXECUTION ERROR
DEVICE DEPENDANT
ERROR
QUERY ERROE
REQUEST CONTROL
OPERATION COMPLETE