Tonghui TH2523/A - Page 80

TH2523 Series Operation Manual Ver1.2
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register.
Descriptions for each bit of the standard event status register are shown as follows:
For example: WrtCmd(“*ESR?”);
 The *STB? query returns contents of the standard service status byte register. The
execution of this command will not affect contents of the standard status byte register.
Query syntax: *STB?
Return format: <value><NL^END>
Where,
<value> NR1 format：decimal expression for contents of the standard status byte register.
Descriptions for each bit of the standard status byte register are shown as follows:
For example: WrtCmd(“*STB?”);
 The *OPC command equals to set the OPC bit of the standard event status register when
TH2523 finishes all parameter measurements. Ever since all pending operations have
been completed, this command will inform the instrument to add a ASCII number “1”
(decimal number: 49) into the output buffer.
Command syntax: *OPC
For example: OUTPUT 717;“*OPC”! Set the OPC bit of the instrument when the last
command is done.
Query syntax: *OPC?
Bit number
Description
7
6
5
4
3
2
1
0
Power On(PON) Bit
User Request(URQ) Bit
Command Error(EME) Bit
Execution Error(EXE) Bit
Device Dependent Error(DDE) Bit
Query Error(QYE) Bit
Request Control(RQC) Bit
Operation Complete(OPC) Bit
Bit number
Description
7
6
5
4
3-0
Operation Status Register Summary Bit
RQS(Request Service) Bit
Standard Event Status Register Summary Bit
MAV(Message Available) Bit
Always 0(zero)