Mitsubishi Electric MELSEC iQ-R Series User Manual page 41

Settings related to the auto tuning
The auto tuning can be executed when the following setting have been configured. Configure the other settings to the values
used for actual operations because actual control starts on completion of the auto tuning.
When "0" has been set for 'CH1 Proportional band (P) setting' (Un\G431) or 'CH1 Heating proportional band (Ph) setting'
(Un\G431), auto tuning is not executed.
• "Input range setting" of "Control basic parameters" in "Application Setting"
• "Target Value(SV) Setting" of "Control basic parameters" in "Application Setting"
• "Upper limit output limiter" of "Limiter setting" in "Application Setting"
• "Lower limit output limiter" of "Limiter setting" in "Application Setting"
• "Cooling upper limit output limiter" of "Heating/cooling control setting" in "Application Setting"
• "Output Change Amount Limiter" of "Limiter setting" in "Application Setting"
• "Sensor Correction Value Setting" in "Application Setting"
• "Control output cycle setting" of "Control basic parameters" in "Application Setting"
• "Cooling control output cycle setting" of "Heating/cooling control setting" in "Application Setting"
• "Primary Delay Digital Filter Setting" in "Application Setting"
• 'CH1 AUTO/MAN mode shift' (Un\G518)
• "AT Bias" of "Auto tuning setting" in "Application Setting"
• "Normal Operation/Reverse Operation Setting" in "Application Setting"
• "Auto tuning mode setting" of "Auto tuning setting" in "Application Setting"
For the system in which a temperature quickly rises, set the upper limit output limiter. Set a value twice as
large as the manipulated value (MV) in a stable state as a guide. After the completion of the auto tuning, the
output limiter can be returned to its initial value to start the control.
Storing the calculation values after auto tuning
After the completion of the auto tuning, calculation values are stored into the following buffer memory areas.
• 'CH1 Proportional band (P) setting' (Un\G431)
• 'CH1 Heating proportional band (Ph) setting' (Un\G431)
• 'CH1 Cooling proportional band (Pc) setting' (Un\G439)
• 'CH1 Integral time (I) setting' (Un\G432)
• 'CH1 Derivative time (D) setting' (Un\G433)
• 'CH1 Loop disconnection detection judgment time' (Un\G537)
*1 A value that is twice as large as the value in 'CH1 Integral time (I) setting' (Un\G432) is automatically set. However, when this setting has
been set to 0s at the auto tuning, the loop disconnection detection judgment time is not stored.
*1
1 FUNCTIONS
1.11 Auto Tuning Function
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