Keithley 7001, Instruction Manual

Page: 178 / 353

IEEE-488 Reference
5-59
Bit 5, Event Summary Bit (ESB)

Set bit indicates that an enabled standard event has oc-
curred. The event can be identified by reading the Standard Event Status Register using the
*ESE? query command (see paragraph 5.10.2).
Bit 6, Master Summary Status (MSS) / Request Service (RQS)

Set bit indicates that one
or more enabled conditions have occurred to generate a service request (SRQ). Note that the
IEEE-488.1 standard designates Bit 6 as the RQS bit and is read by performing a Serial Poll.
Bit 7, Operation Summary Bit (OSB)

Set bit indicates that an enabled operation event has
occurred. The event can be identified by reading the Operation Event Status Register using the
following SCPI command structure:
:STATus:OPERation?
See paragraph 5.16 for details.
10 OUTPUT 707; “*SRE?” ! Request contents of register
20 ENTER 707; A$ ! Address 7001 to talk
30 PRINT A$ ! Display value of register
40 END
Programming
example
Figure 5-16
Status Byte Register
B7 B6 B5 B4 B3 B2 B1 B0
(2 ) 7 (2 ) 6 (2 ) 5 (2 ) 4 (2 ) 3 (2 ) 2
32
0/1
Bit Position
Event
Decimal Weighting
Value
Value : 1 = Event Bit Set
0 = Event Bit Cleared
Events : OSB = Operation Summary Bit
MSS = Master Summary Status
RQS = Request Service
ESB = Event Summary Bit
MAV = Message Available
QSB = Questionable Summary Bit
EAV = Error Available
OSB ESB MAV QSB EAV
0/1 0/1 0/1 0/1
128 16 8 4
MSS,
RQS
64
0/1
Artisan Scientific - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisan-scientific.com