Lake Shore Model 331 Temperature Controller User’s Manual
QOPC Operation Complete Command
Input: QOPC[term]
Remarks:
Generates an Operation Complete event in the Event Status Register upon completion of all
pending selected device operations. Send it as the last command in a command string.
QOPC? Operation Complete Query
Input: QOPC?[term]
Returned:
1[term]
Remarks: Places a “1” in the controller output queue upon completion of all pending selected device
operations. Send as the last command in a command string.
Not the same as QOPC.
QRST Reset Instrument Command
Input: QRST[term]
Remarks:
Sets controller parameters to power-up settings.
QSRE Service Request Enable Register Command
Input: QSRE <bit weighting>[term]
Format:
nnn
Remarks: Each bit has a bit weighting and represents the enable/disable mask of the corresponding
status flag bit in the Status Byte Register. To enable a status flag bit, send the command
QSRE with the sum of the bit weighting for each desired bit. Refer to Paragraph 6.1.3.1 for a
list of status flags.
Example: To enable status flags 0, 2, 4, and 6, send the command QSRE 89[term]. 89 is the sum of
the bit weighting for each bit.
Bit Bit Weighting Event Name
0 1 New A&B
3 8 Alarm
4 16 Error
6 64
SRQ
89
QSRE? Service Request Enable Register Query
Input: QSRE?[term]
Returned:
<bit weighting>[term]
Format: nnn Refer to Paragraph 6.1.3.1 for a list of status flags.
QSTB? Status Byte Query
Input: QSTB?[term]
Returned:
<bit weighting>[term]
Format: nnn
Remarks: Acts like a serial poll, but does not reset the register to all zeros. The integer returned
represents the sum of the bit weighting of the status flag bits that are set in the Status Byte
Register. Refer to Paragraph 6.1.3.1 for a list of status flags.
Remote Operation 6-25
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