Instruction manual

OPERATIONS for E5CN (Continued):
PID Tuning:
The Omron E5CN temperature controller incorporates the capability of automatically
tuning the PID parameters (Auto-Tuning) to fit the characteristics of the process. The
optimum PID parameters are automatically set by forcibly changing the Manipulated
Variable (MV) to calculate the characteristics (limit cycle method) of the control target.
Depending on the auto-tune level selected, AT-1 or AT-2, the controller will run this test
at either 40% or 100% of the actual Process Set Point. When the auto tuning is
complete, the appropriate PID tuning parameters will be automatically installed into the
non-volatile memory of the temperature controller.
1. Turn on water supply and set the desired water flow.
2. Set the Process Temperature Set point to the desired value.
(See OPERATIONS; Changing Primary Set point,).
3. Press and hold the level key for a minimum of one second to enter the
adjustment level.
4. Press the mode key to index through the adjustment level to get to the At
settting.
5. Press the up or down arrow key to adjust the At value to oN.
6. Press and hold the level key for at least 3 seconds to return to the normal
display.
7. Turn the ENABLE HEATER switch past the ON position to the RESET position,
then release the switch, which will move to the ON position. If all criteria for the
various safety devices have been met, the heater will begin to heat.
8. When the process is complete, the appropriate PID tuning parameters will be
installed and retained in the non-volatile memory.
M-45-02 TYTAN Manual
Revision - Date: 01 – 11/16/07
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