User`s manual

122 cHAPTER 6: Computer Interface Operation
Model 335 Temperature Controller
POLARITY Output Voltage Polarity Command
Input POLARITY <output>,<polarity>[term]
Format n,n
<output> Output for which to configure the polarity setting: 2
<polarity> Specifies output voltage is 0=unipolar (positive output
only) or 1=bipolar (positive or negative output)
Remarks The polarity command only applies to Output 2, and only when output type is voltage.
POLARITY? Output Voltage Polarity Query
Input POLARITY?[term]
Returned <polarity>[term]
Format n (refer to command for description)
RAMP Control Setpoint Ramp Parameter Command
Input RAMP <output>,<off/on>,<rate value>[term]
Format n,n,nnnn
<output> Specifies which output’s control 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. A rate of 0 is interpreted as infinite, and 
will therefore respond as if setpoint ramping were off.
Example RAMP 1,1,10.5[term] when Output 1 setpoint is changed, ramp the current set-
point to the target setpoint at 10.5 K/minute.
Remarks Control loop settings are assigned to outputs, which results in the settings being
applied to the control loop formed by the output and its control input.
RAMP? Control Setpoint Ramp Parameter Query
Input RAMP? <output>[term]
Format n
<output> Specifies which output’s control loop to query: 1 or 2.
Returned <off/on>,<rate value>[term]
Format n,nnnn (refer to command for description)
RAMPST? Control Setpoint Ramp Status Query
Input RAMPST? <output>[term]
Format n
<output> Specifies which output’s control loop to query: 1 or 2.
Returned <ramp status>[term]
Format n
<ramp status> 0 = Not ramping, 1 = Setpoint is ramping.