39
1) We assume that you have configured the controller according to the different menus at this point.
2) If the controller is not already in Standby mode, place it in Standby now as follows. Press and hold the
Mode/Enter
key for three seconds and the display will indicate your current operating mode. Press the
Raise
key or Lower key to select Standby ( Stby ). Press Mode key again and the display will
alternate between Stby and the process value. This will deactivate all outputs.
3) If Setpoint Value has not been entered, adjust the setpoint now by using the Raise or Lower key to set
the desired setpoint.
4) Wait for process to stabilize before proceeding, e.g., in the case of a heating and cooling process, return
to ambient temperature.
5) To initiate Autotuning, press and hold the Mode/Enter key again for three seconds, then press the
Raise or Lower key repeatedly until Atun appears. Finally, press the Mode/Enter key again.
The display will alternately indicate tunE and process value as the controller “learns” the proper
proportional band, derivative, and integral values for the process.
6) We strongly recommend that, once autotune is complete, you revisit the Control menu and record the
values of the proportional, derivative and integral action settings that have been determined.
* Tuning accuracy increases as the spread between ambient and setpoint value increases.
* Tuning should be performed with system in equilibrium (no latent energy remaining).
* If unacceptable overshoot occurs on restart, shut down the process and increase the damping setting.
* If sluggish response is observed, shut down the process and decrease the damping setting.
* Autotuning will attempt to learn the process for a maximum of 60 minutes.
If a tune error condition occurs, the upper display will toggle between tunE and a numeric error code for three
seconds before the tune process terminates. The controller will automatically go into Standby mode when a
tuning error occurs.
Possible error codes are:
02 = No PID Device Configured
03 = Incorrect Output Action
05 = Insufficient Setpoint-Process Value Deviation
08 = Invalid Tune Results
09 = Tune Timeout
Stby
Ctrl
Atun
To Next Page
Loading...
Need help?
General