Operation Event Register Set - Lakeshore 642 User Manual

5.1.4.2.2

Operation Event Register Set

The Operation Event Register reports the following instrument events: ramp done, compliance. Any or all of these events
may be reported in the operation event summary bit through the enable register, see Figure 5-3. The Operation Event
Enable command (OPSTE) programs the enable register and the query command (OPSTE?) reads it. OPSTR? reads the
Operation Event Register. OPST? reads and clears the Operation Condition register. The used bits of the Operation
Event Register are described as follows:
Power Limit, Bit (2) – This bit is set if the output is in power limit.
Ramp Done, Bit (1) – This bit is set when the output current ramp is completed.
Compliance, Bit (0) – This bit is set if the output is in compliance limit.
Operation
7
Condition
Register
Not
Used
OPST?
Operation
7
Event
Register
Not
Used
OPSTR?
Operation
Event Enable
7
Register
Not
OPSTE,
Used
OPSTE?
Computer Interface Operation
Lake Shore Model 642 Electromagnet Power Supply User's Manual
6 5 4 3
Not Not Not Not
Used Used Used Used
6 5 4 3
Not Not Not Not
Used Used Used Used
6 5 4 3
Not Not Not Not
Used Used Used Used
Figure 5-3. Operation Event Register
2 1 0 Bit
Name
2 1 0 Bit
Name
AND
AND
AND
2 1 0 Bit
Name
OR
To Bit 7 (OSB) of
Status Byte Register
(See Figure 5-1.)
5-9