Keithley 2450 User Manual

Model 2450
Interactive SourceMeter® Instrument Reference Manual Appendix C:
Status model
2450-901-01 Rev. B/September 2013 C-11
Status Byte Register diagram
The Status Byte Register consists of two 8-bit registers that control service requests, the Status Byte
Register and the Service Request Enable Register. These registers are shown in the following figure.
Figure 152: Model 2450 Status Byte Register
The bits in the Status Byte Register are described in the following table.
Bit
Decimal
value
Bit name When set, indicates the following
has occurred:
0
1
Measurement summary Bit (MSB)
An enabled questionable event
1
2
Not used
Not applicable
2
4
Error available (EAV)
An error is present in the error queue
(warning and information messages do
not affect this bit)
3
8
Questionable summary bit (QSB)
An enabled questionable event
4
16
Message available (MAV)
A response message is present in the
output queue
5
32
Event summary bit (ESB)
An enabled standard event
6
64
Request for service (RQS)/Master summary
status (MSS)
An enabled summary bit of the Status
Byte Register is set; depending on
how it is used, this is either the
Request for Service (RQS) bit or the
Master Summary Status (MSS) bit
7
128
Operation summary bit (OSB)
An enabled operation event

Keithley 2450 Specifications

General

Brand	Keithley
Model	2450
Category	Test Equipment
Language	English