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3 - 70 USING THE COMBISCOPE INSTRUMENTS
3.15 Status Reporting
Status reporting is done via the status reporting system, which is completely
described in chapter 5 "THE STATUS REPORTING SYSTEM" of the SCPI Users
Handbook. The following figure shows the principle of the standard Status Byte
(STB) register and the Service Request Generation (SRQ) mechanism:
3.15.1 Status data for the CombiScope instruments
The following status data applies to the CombiScope instruments:
•
For the meaning of the bits of the OPERation status, refer to section 3.15.1.1.
•
For the meaning of the bits of the QUEStionable status, refer to section 3.15.1.2.
•
For the meaning of the bits of the standard Event Status Register, refer to the
command reference for the
*
ESR? query.
•
The message output queue can contain about 250 data bytes.
•
The error/event queue can contain 20 error messages before it overflows.
&
&
&
&
&
&
&
&
OPERation
Status
Standard
Event Status
QUEStionable
Status
Output
Queue
Error/
Event
Queue
Service
Request
Generation
SRQ OPER
RQS
MSS
ESB MAV
QUES
bit2
bit1
bit0
Logical OR
RQS read by
Serial Poll
MSS read by *STB?
Status Byte Reg.
7
5
4
3
2
10
Service Request
Enable Register
*SRE <NRf>
*SRE?
ST7164
Not Used
Figure 3.23 The status reporting model for CombiScope instruments