Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual
Remote Operation
4-16
4.3.5 Current Step Limit Commands Description
The following MPS commands configure the various functions of the current step limit features.
ISTP Programs Output Current Step Limit
Input: ISTP [step limit] where [step limit] = a value between 0 and +999.9900.
Remarks: Truncates the value to the 0.001 place. The initial condition is +000.000 A. The step limit is
forced to a plus. Control Bus inputs 4 places, display rounds to 0.01 or 0.001 place.
ISTP? Output Current Step Limit Query
Input: ISTP?
Returned: A number between 0 and +999.9900 A.
Remarks: Returns nine characters plus up to two terminators. Value is shown as a “+”, but applies to both
positive and negative step changes.
ISTPS Programs Output Current Step Limit Status
Input: ISTPS [status] where [status] = 0 to turn OFF output current step limit, or 1 to turn it ON.
Remarks: The initial condition is 0.
ISTPS? Output Current Step Limit Status Query
Input: ISTPS?
Returned: 0 for OFF, or 1 for ON.
Remarks: Returns one character plus up to two terminators.
STEP? Output Current Step Limit Exceeded Query
Input: STEP?
Returned: 0 if the step limit has not been exceeded, or 1 if it has been exceeded.
Remarks: Returns one character plus up to two terminators.
STEPR1 Output Current Step Limit Status Reset
Input: STEPR1
Returned: Nothing
Remarks: When the output current step limit has been exceeded, this command must be issued before
normal operation can be resumed.
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