Lakeshore 331S - Page 132

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.
6-36 Remote Operation