Mitsubishi Electric MELSEC iQ-R Series User Manual page 295

CH1 Auto tuning mode selection
Select one of the following two auto tuning modes depending on the controlled object to be used:
Auto tuning Description
Standard mode The standard mode is appropriate for most controlled objects. This mode is especially suitable for controlled objects that have
an extremely slow response or can be affected by noise or disturbance.
However, PID constants with a slow response (low gain) may be calculated from the controlled objects whose ON time or OFF
time during the auto tuning is only around 10s.
In this case, PID constants with a fast response can be calculated by selecting the high response mode and executing the auto
tuning.
High response mode This mode is suitable for controlled objects whose ON time or OFF time during the auto tuning is only around 10s. PID constants
with a fast response (high gain) can be calculated.
However, the temperature process value (PV) may oscillates near the set value (SV) because of the too high gain of the PID
constants calculated. In this case, select the standard mode and execute the auto tuning.
For details on the auto tuning function, refer to the following:
Page 38 Auto Tuning Function
■Buffer memory address
The following shows the buffer memory address of this area.
Buffer memory area name
CH Auto tuning mode selection
CH Auto tuning mode selection (in the Q compatible mode)
■Setting range
• 0: Standard mode
• 1: High response mode
■Default value
The default value is Standard mode (0).
CH1 CH2
543 743
184 185
Appendix 3 Buffer Memory Areas
CH3 CH4
943 1143
186 187
APPX
293
A