Lakeshore 336, Руководство пользователя, Страница: 156 / 192

144 c
HAPTER
6: Computer Interface Operation
Model 336 Temperature Controller
TEMP? Thermocouple Junction Temperature Query
Input
TEMP?[term]
Returned <junction temperature>[term]
Format +nnnnn
Remarks Temperature is in kelvin. This query returns the temperature of the ceramic thermo-
couple block used in the room temperature compensation calculation
TLIMIT Temperature Limit Command
Input
TLIMIT <input>,<limit>[term]
Format a,+nnnn
<input>
Specifies which input to configure: A–D (D1–D5 for 3062
option).
<limit>
The temperature limit in kelvin for which to shut down all
control outputs when exceeded. A temperature limit of zero
turns the temperature limit feature off for the given
sensor input.
Example TLIMIT B,450[term] —if the temperature of the sensor on Input B exceeds 450 K, all
control outputs will be turned off.
Remarks A temperature limit setting of 0 K turns the temperature limit feature off.
TLIMIT? Temperature Limit Query
Input
TLIMIT? <input>[term]
Format a
<input>
Specifies which input to query: A–D (D1–D5 for 3062
option).
Returned < limit>[term]
Format +nnnn (refer to command for description)
TUNEST? Control Tuning Status Query
Input
TUNEST?[term]
Returned <tuning status>,<output>,<error status>,<stage status>[term]
Format n,n,n,nn
<tuning status>
0 = no active tuning, 1 = active tuning.
<output> Heater output of the control loop being tuned (if tuning):
1 = output 1, 2 = output 2
<error status> 0 = no tuning error, 1 = tuning error
<stage status> Specifies the current stage in the Autotune process.
If tuning error occurred, stage status represents stage
that failed.
Remarks If initial conditions are not met when starting the autotune procedure, causing the
autotuning process to never actually begin, then the error status will be set to 1 and
the stage status will be stage 00.