Lake Shore Model 331 Temperature Controller User’s Manual
Q
OPC
Operation Complete Command
Input:
Q
OPC[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.
Q
OPC?
Operation Complete Query
Input:
Q
OPC?[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
Q
OPC
.
Q
RST
Reset Instrument Command
Input:
Q
RST[term]
Remarks:
Sets controller parameters to power-up settings.
Q
SRE
Service Request Enable Register Command
Input:
Q
SRE <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
Q
SRE
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
Q
SRE 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
Q
SRE?
Service Request Enable Register Query
Input:
Q
SRE?[term]
Returned:
<bit weighting>[term]
Format:
nnn
Refer to Paragraph 6.1.3.1 for a list of status flags.
Q
STB?
Status
Byte
Query
Input:
Q
STB?[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
