Keithley 2001 User Manual

IEEE-488 Reference
4-47
Bit 6, Master Summary Status (MSS) / Request Service (RQS)  Set bit indicates that one
or more enabled Status Byte conditions have occurred. The MSS bit can be read using the STB?
query command, or the occurrence of a service request (RQS bit set) can be detected by per-
forming 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
:STATus:OPERation? query command (see paragraph 4.21 for details).
Programming Example 10 OUTPUT 716; “*SRE?” ! Request contents of register
20 ENTER 716; A$ ! Address 2001 to talk
30 PRINT A$ ! Display value of register
40 END
4.0.15 *TRG  trigger
Purpose To issue a GPIB trigger to the Model 2001.
Format *TRG
Description The *TRG command is used to issue a GPIB trigger to the Model 2001. It has the same effect
as a group execute trigger (GET).
The *TRG command is used as an arm, scan and/or measure event to control operation. The
Model 2001 will react to this trigger if GPIB is the programmed control source. The control
source is programmed from the SCPI :TRIGger subsystem (see paragraph 4.24).
*TRG can also be used as the pre-trigger for buffer operation.
Programming Example OUTPUT 716; “*TRG” ! Trigger 2001
B7 B6 B5 B4 B3 B2 B1 B0
(2 )
7
(2 )
6
(2 )
5
(2 )
4
(2 )
3
(2 )
2
(2 )
0
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
MSB = Measurement Summary Bit
OSB ESB MA QSB EAV
0/1 0/1 0/1 0/1
128 16 8 4
MSS,
RQS
64
0/1
MSB
1
0/1
Figure 4-18
Status Byte Register

Keithley 2001 Specifications

General

Brand	Keithley
Model	2001
Category	Multimeter
Language	English