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9.5 Communication Methods
109
9
This instrument implements the status model defined by IEEE 488.2 with regard to the serial
poll function using the service request line.
The term “event” refers to any occurrence that generates a service request.
The Status Byte Register contains information about the event registers and the output
queue. Required items are selected from this information by masking with the Service
Request Enable Register. When any bit selected by the mask is set, bit 6 (MSS; the Master
Summary Status) of the Status Byte Register is also set, which generates an SRQ (Service
Request) message and dispatches a service request.
RS-232C does not provide a function for issuing service requests. Still, SRER setup and STB
reading are available.
Status Byte Register
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
unused
SRQ
ESB
MAV
unused unused
ESB1 ESB0
MSS
&
&
&
&
&
&
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
unused
0
ESB
MAV
unused unused
ESB1 ESB0
Logical
Status Byte
Register (STB)
Service Request Enable
Register (SRER)
Service Request
SRQ occurrence
Output Queue data information
Standard Event Register Description
Each of these bits corresponds to a specific event register
Overview of Service Request Occurrence
SRQ (Service Request) is a GP-IB function only. However, STB (Status Byte Register) infor-
mation can be acquired with RS-232C using the
STB?
command.
Содержание RM3542
Страница 2: ......
Страница 6: ...Contents iv ...
Страница 16: ...Operating Precautions 10 ...
Страница 26: ...1 3 Screen Organization 20 ...
Страница 32: ...2 3 Turning the Power On and Off 26 ...
Страница 46: ...3 8 Confirming Faulty Measurements 40 ...
Страница 64: ...4 12 Compensating for Thermal EMF Offset Offset Voltage Compensation OVC 58 ...
Страница 84: ...6 4 Auto Exporting Measured Values at End of Measurement Data Output Function 78 ...
Страница 90: ...7 3 Printing 84 ...
Страница 172: ...9 10 Device Compliance Statement 166 ...
Страница 190: ...11 4 Disposing of the Instrument 184 ...
Страница 200: ...Appendix 5 Dimensional Diagram A10 Appendix 5 Dimensional Diagram ...
Страница 214: ...Index Index 4 ...
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