Lakeshore 340 User Manual page 126

CLIMIT
Configure Control Loop Limit Parameters
Input: CLIMIT <loop>, [<SP limit value>], [<positive slope value>], [<negative slope value>],
[<max current>], [<max range>]
Returned: Nothing
Remarks: Configure control loop limits.
<loop>
<SP limit value>
<positive slope value> Specifies maximum positive change in output.
<negative slope value> Specifies maximum negative change in output.
<max current>
<max range>
Example: CLIMIT 1, 325.0, 10, 0[term] - Control Loop 1 limits the setpoint to 325, turns off output when
the reading (based on the setpoint units) reaches 325, limits the change in the output to
+10% with no limit on the output going down.
CLIMIT?
Query Control Loop Limit Parameters
Input: CLIMIT? <loop>
Returned: <SP limit value>, <positive slope value>, <negative slope value>, <max current>, <max
range>. Format: ±nnn.nnnE±n,nnn.n,nnn.n,n,n[term]
Remarks: Returns parameters for control loop limits. See the CLIMIT command for parameter
descriptions. <loop> specifies which loop to query.
CMODE
Configure Control Loop Mode
Input: CMODE <loop>, <mode>
Returned: Nothing
Remarks: Configures the control mode for a control loop.
<loop>
<mode> Specifies the control mode. Valid entries:
Example: CMODE 1, 4[term] - Control Loop 1 uses PID AutoTuning.
CMODE?
Query Control Loop Mode
Input: CMODE? <loop>
Returned: <mode>. Format: n[term]
Remarks: Returns the control mode for a control loop. See the CMODE command for parameter
descriptions. <loop> specifies which loop to query.
COMM
Configure Serial Interface Parameters
Input: COMM [<terminator>], [<bps>], [<parity>]
Returned: Nothing
Remarks: Configures the serial interface parameters.
<terminator> Specifies the terminator: 1 = <CR><LF>, 2 = <LF><CR>, 3 = <CR>, 4 = <LF>.
<bps> Specifies the bits per second (bps) rate. Valid entries: 1 = 300, 2 = 1200, 3 = 2400,
4 = 4800, 5 = 9600, 6 = 19200
<parity> Specifies communication parity. Valid entries: 1 = 7 data bits, 1 stop bit, odd parity;
2 = 7 data bits, 1 stop bit, even parity; 3 = 8 data bits, 1 stop bit, no parity.
Example: COMM 1, 6, 3[term] - After receiving the current terminator, the instrument responds at
19,200 bps using 8 data bits, 1 stop bit, no parity, and <CR><LF> as a terminator.
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Lake Shore Model 340 Temperature Controller User's Manual
Specifies which loop to configure.
Specifies loop setpoint limit and at what reading the loop turns off
output.
Specifies maximum current for loop 1 heater output (Paragraph
6.12.1). Valid entries: 1 = 0.25 A, 2 = 0.5 A, 3 = 1.0 A, 4 = 2.0 A.
Specifies maximum loop 1 heater range (Paragraph 6.13.3). Valid
entries: 0 - 5.
Specifies which loop to configure.
4 = AutoTune PID, 5 = AutoTune PI, 6 = AutoTune P.
1 = Manual PID, 2 = Zone, 3 = Open Loop,
Remote Operation