METIS M308 / M309 / M313 / M316 / M318 / M323 / H309 / H316 / H318 (12-pin)
SensorTools Software
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Other functions:
-
Setpoint limit
1 and 2: Activates every selected “setpoint limit” output (see
puts / Outputs and under
) if set temperature is exceeded
or falls below. The required temperature has to be set relative to the setpoint temperature (in the
control parameter field), not as absolute value.
- Setpoint deviation:
The setpoint deviation is a global parameter that controls the program flow.
The setpoint level is the maximum deviation between actual value and nominal value to consider a
value as controlled successfully and start the next step.
AutoTune settings:
The AutoTune function enables to detect automatically useful values
for the proportional Xp and integral time constant Ti. The function tries to find the values Xp and Ti
without overshooting the setpoint temperature.
-
The
AutoTune target temperature
defines the temperature that is used for Xp and Ti determina-
tion. The entry occurs in % and defines the difference between setpoint and actual value (example:
setpoint is 1000°C, the measurement object is cold which means the actual value is the pyrome-
ter’s beginning of temperature range and thus, for example, 500°C, then the target temperature is
750°C at 50% factory setting). Only a value below 100% prevents a temperature exceeding during
P-I-determination and thus a possibly material destruction due to overheating.
- Next start with AutoTune:
Check this box to activate the AutoTune function with the next control-
ler start. Starting the controller with “Start” will start first the AutoTune process followed by the pro-
grammed control process. This also works fort an external control start. The function is only active
for one controller start and will be unchecked with the next start.
- Controller start always with AutoTune:
Starts every time the AutoTune function when the con-
troller is started.
INFO:
The AutoTune process always starts from the current actual value (measured value). At
a restart any residual heat of the object can thus potentially lead to unusable values.
Starting the Controller
With the start button or via external push button (digital input 1 is config-
ured for external controller start, see under
Start / stop con-
troller
), the control process is started.
The control process is running until it is stopped manually, or automatically after finishing a hold time
(hold time starts if a setpoint value is reached).
Note:
Recording can be started simultaneously with controller start if corresponding settings are made
(see under
Device Settings and Configuration
„automatic recording
by: active control“ as well as „automatic end of record by: inactive control“) where required.