Figure 14-1 Model 2500 Status Register Structure - Keithley 2500 User Manual

Models 2500 and 2502 User's Manual
Figure 14-1
Model 2500 status register structure
Calibration Summary
Command Warning
(Always Zero)
Operation Complete
Query Error
Device Specific Error
Execution Error
Command Error
User Request
Power On
(Always Zero)
Measurement Measurement
Condition
Register
Limit 1 Summary
L1
Limit 2 Summary L2
Limit 3 Summary
L3
Limit 4 Summary
L4
Limit Fail High
LFH
Limits Pass LP
RAV
Reading Available
Reading Overflow ROF
Buffer Available
BAV
Buffer Full BFL
10
Output Enable OE
12
Src 1 Compliance
S1C
Src 2 Compliance
S2C
(Always Zero) 15
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Questionable
Event
Questionable Questionable
Condition Event Enable
Register Register Register
0 0 & 0
1 1 & 1
2 2 2
&
3 3 & 3
&
4 4 4
5 5 & 5
6 6 & 6
& 7
7
7
Cal Cal & Cal
9 9 & 9
10 10 & 10
11 &
11 11
&
12 12 12
&
13 13 13
Warn Warn Warn
&
&
15 15 15
Output Queue
Standard
Event
Standard
Status
Event
Status
Enable
Register Register
OPC & OPC
1 & 1
QYE & QYE
DDE & DDE
&
EXE EXE
CME & CME
&
URQ URQ
Logical
&
PON PON
OR
8 & 8
9 9
&
10 10
&
&
11 11
12 & 12
&
13 13
14 14
&
15 & 15
*ESR? *ESE
*ESE?
Measurement
Event
Event Enable
Register Register
L1 L1
&
L2 L2
&
L3 L3
&
L4 L4
&
LFH & LFH
LP
& LP
RAV RAV
&
Logical
ROF ROF
&
OR
BAV & BAV
BFL BFL
&
10 & 10
OE OE
&
12
12 &
S1C S1C
&
S2C S2C
&
15 15
&
Logical
OR
Error Queue
Status
Byte
Register
MSB
1
EAV
QSB
MAV
ESB
RQS/MSS
OSB
*STB?
Master Summary Status (MSS)
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 Staus
OSB = Operation Summary Bit
Note : RQS bit is in serial poll byte,
MSS bit is in *STB? response.
Operation
Operation
Condition Event
Register Register
Calibrating Cal
Cal
1 1
2 2
Sweeping Swp
Swp
4
4
Waiting for Trigger Trig Trig
Arm
Waiting for Arm Arm
7 7
8 8
9 9
Idle Idle Idle
11 11
12 12
13 13
14 14
15 15
Status Structure
Service
Request
Enable
Register
& MSB
& 1
& EAV
QSB
& Logical
MAV OR
&
& ESB
6
& OSB
*SRE
*SRE?
Operation
Event
Enable
Register
Cal
&
1
&
& 2
Swp
&
4
&
Trig
&
Arm
&
Logical
& 7
OR
&
8
& 9
Idle
&
&
11
& 12
13
&
& 14
& 15
14-3