Mitsubishi Electric MELSEC iQ-R Series User Manual page 48

Actions after the completion of the auto tuning
■When the auto tuning ends properly
The temperature control module operates as follows:
• 'CH1 Auto tuning status' (X4) turns OFF.
• Set the PID constants.
• Set "Loop disconnection detection judgment time" of "Loop disconnection detection setting" in "Application Setting." (When
0 (s) has been set before the start of the auto tuning, no value is stored. (The value is not changed from 0.))
■When the auto tuning ends in failure
The temperature control module operates as follows:
• An auto tuning error occurs.
• 'CH1 Auto tuning status' (X4) turns OFF.
• The PID constants are not set.
Checking the completion of the auto tuning
The completion of the auto tuning can be checked by turning from ON to OFF 'CH1 Auto tuning status' (X4).
Adjustment after auto tuning
To change the control response for the PID constants calculated by the auto tuning, change the setting in the following
parameter.
• "Control Response Parameters" of "Control basic parameters" in "Application Setting"
In the system where a temperature rises rapidly, the auto tuning may not be executed properly due to the
excessive temperature rise during the auto tuning. Create a program that executes the auto tuning in
combination with the alert function that stops the auto tuning when an alert occurs during the auto tuning.
During AT loop disconnection detection function
For details on the during AT loop disconnection detection function, refer to the following:
Page 93 During AT Loop Disconnection Detection Function
1 FUNCTIONS
46
1.11 Auto Tuning Function