Lake Shore Model 331 Temperature Controller User’s Manual
PID
Control Loop PID Values Command
Input:
PID <loop>, <P value>, <I value>, <D value>[term]
Format:
n,±nnnnnn,±nnnnnn,±nnnnnn
<loop>
Specifies loop to configure: 1 or 2.
<P value>
The value for control loop Proportional (gain): 0.1 to 1000.
<I value>
The value for control loop Integral (reset): 0.1 to 1000.
<D value>
The value for control loop Derivative (rate): 0 to 200.
Remarks:
Setting resolution is less than 6 digits indicated.
Example: PID
1,10,50[term]
– Control Loop 1 P is 10 and I is 50.
PID?
Control Loop PID Values Query
Input:
PID? <loop>[term]
Format:
n
<loop>
Specifies which loop to query: 1 or 2.
Returned:
<P value>, <I value>, <D value>[term]
Format:
±nnnnnn,±nnnnnn,±nnnnnn
(Refer to command for description)
RAMP
Control Setpoint Ramp Parameter Command
Input:
RAMP <loop>, <off/on>, <rate value>[term]
Format:
n,n,±nnnnn
<loop>
Specifies which loop to configure: 1 or 2.
<off/on>
Specifies whether ramping is 0 = Off or 1 = On.
<rate value> Specifies setpoint ramp rate in Kelvin per minute from 0.1 to 100. The rate is
always positive, but will respond to ramps up or down.
Example: RAMP
1,1,10.5[term]
– When Control Loop 1 setpoint is changed, ramp the current setpoint
to the target setpoint at 10.5 K/minute.
RAMP?
Control Setpoint Ramp Parameter Query
Input:
RAMP? <loop>
Format:
n
<loop>
Specifies which loop to query: 1 or 2.
Returned:
<off/on>, <rate value>[term]
Format:
n,±nnnnn
(Refer to command for description)
RAMPST?
Control Setpoint Ramp Status Query
Input:
RAMPST? <loop>[term]
Format:
n
<loop>
Specifies which loop to query: 1 or 2.
Returned:
<ramp status>[term]
Format:
n
<ramp status> 0 = Not ramping, 1 = Setpoint is ramping.
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Remote Operation
