Keithley 2750 User Manual page 304

Model 2750 Multimeter/Switch System User's Manual
Figure 11-1
Model 2750 status register structure
Questionable
Temperature Summary
Calibration Summary
Command Warning
(Always Zero)
Operation Complete
Query Error
Device-Dependent Error
Execution Error
Command Error
User Request
Power On
(Always Zero)
Measurement
Condition
Register
Reading Overflow ROF
LL1
Low Limit 1 Event
High Limit 1 Event HL1
LL2
Low Limit 2 Event
High Limit 2 Event HL2
RAV
Reading Available
BN
Buffer Notify
BAV
Buffer Available
BHF
Buffer Half Full
Buffer Full BF
Buffer Overflow BOF
HL
Hardware Limit Event
BQF
Buffer Quarter Full
Buffer Three-Quarter Full BTF
MS
Master Limit
(Always Zero) 15
Questionable Questionable
Condition Event Event Enable
Register Register
0 0 &
1 1 &
2 2 &
3 3 &
Temp Temp
&
5 5
&
6 6
&
7 7
&
Cal Cal
&
9 9
&
10 10
&
11 11
&
12 12 &
13 13
&
Warn Warn
&
15 15
&
Standard
Standard Event
Event Status
Status Enable
Register Register
OPC & OPC
1 1
&
QYE
QYE
&
DDE
DDE
&
EXE & EXE
CME CME
&
URQ
URQ
&
PON PON
&
8 & 8
9 9
&
10 10
&
11 11
&
&
12 12
13 13
&
14 14
&
15 15
&
Measurement Measurement
Event Event Enable
Register Register
ROF & ROF
LL1 LL1
&
HL1 HL1
&
LL2 LL2
&
HL2 HL2
&
RAV RAV
&
BN BN
&
BAV BAV
&
BHF & BHF
BF BF
&
BOF BOF
&
HL HL
&
BQF & BQF
BTF BTF
&
MS MS
&
15 15
&
Register
0
1
2
3
Temp
5
6
Logical
7
OR
Cal
9
10
11
12
13
Warn
15
Output Queue
Logical
OR
MSB = Measurement Summary Bit
EAV = Error Available
QSB = Questionable Summary Bit
MAV = Message Available
ESB = Event Summary Bit
RQS/MSS = Request for Service/Master Summary Status
OSB = Operation Summary Bit
Note: RQS bit is in serial poll byte,
Measuring
Waiting for
Logical
Trigger
OR
Filter Settled
Idle State
(Always Zero)
Status Structure
Error Queue
Service
Status Request
Byte Enable
Register Register
MSB
MSB
&
1
&
EAV
&
QSB
&
MAV MAV
&
ESB
&
RQS/MSS
OSB
&
*STB? *SRE / *SRE?
Master Summary Status (MSS)
MSS bit is in *STB? response.
Operation Operation Operation
Condition Event Event Enable
Register Register Register
0 0 &
1 1 &
2 2
&
3 3
&
Meas Meas Meas
&
Trig Trig Trig
&
6 6
&
7 7
&
Filt Filt & Filt
9 9
&
Idle Idle Idle
&
11 11
&
&
12 12
13 13
&
14 14
&
15 15
&
11-3
1
EAV
Logical
QSB
OR
ESB
6
OSB
0
1
2
3
6
Logical
7
OR
9
11
12
13
14
15