
Lake Shore Model 642 Electromagnet Power Supply User’s Manual
5-6 Computer Interface Operation
Name
Name
Name
Used
Not
Used
Not
765
4
3
21
0
Bit
Used Used
ERST?
Not
Used
7
Not
Used
6
5
Condition Register
Error Status
7
Not
6
5
Not
4
3
2
1 0Bit
43
21
0Bit
DAC OCFOOV OOCTF
TF
TF
AND
AND
AND
AND
AND
Event Register
Error Status
ERSTR?
Enable Register
Error Status
ERSTE, ERSTE?
A
Sheet
1 of 2
To
AND
ERSTE, ERSTE?
Enable Register
Error Status
AND
76
5
43
AND
AND
AND
2 1
0
Bit
Name
AND
Event Register
ERST?
Error Status
Condition Register
Error Status
ERSTR?
LLV
67
5
3
4
76
HLVMFF
5
4
3
2
0
1
Name
Bit
EPETH CAL
21
0
Name
Bit
Sheet
B
1 of 2
To
PFFREF
PFFREF HLVMFF LLV EPETH CAL
PFFREF HLVMFF LLV EPETH CAL
AND
AND
OR
Hardware Errors
TF = Temperature Fault
DAC = DAC Processor Not Responding
OCF = Output Control Failure
OOV = Output Over Voltage
OOC = Output Over Current
LLV = Low Line Voltage
Operational Errors
EPE = External Current Program Error
TH = Temperature High
HLV = High Line Voltage
MFF = Magnet Flow Switch Fault
PFF = Power Supply Flow Switch Fault
REF = Remote Enable Fault
CAL = Calibration Error
Used
Not
Used
Not
Used
Not
OR
DAC OCFOOV OOC
DAC OCFOOV OOC
Figure 5-1. Model 642 Status System (Sheet 2 of 2)
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