Mitsubishi Electric MELSEC iQ-R Series User Manual page 42

Backing up calculation values at the completion of the auto tuning
When the following setting has been configured to "Valid" at the start of the auto tuning, values are automatically backed up in
the non-volatile memory.
[Navigation window]  [Parameter]  [Module Information]  Target module  [Application Setting]  [Auto tuning
setting]  [Automatic backup setting after auto tuning of PID constants]
To read the calculation value from the non-volatile memory to the buffer memory, set 'CH1 Memory's PID constants read
command' (Un\G440) to Requested (1). (Page 251 CH1 Memory's PID constants read command)
To use the PID constants stored in the buffer memory in the Q compatible mode even after power-OFF, follow
the methods below.
• Use the initial setting of the engineering tool. (Page 135 PARAMETER SETTING)
• Store the PID constants in the non-volatile memory, and transfer them when the power is turned from OFF
to ON or when the CPU module is reset and the reset is cleared. (Page 123 Buffer Memory Data
Backup Function)
• Write the values directly into the buffer memory using a program.
Precautions
When the auto tuning is executed with the engineering tool, the memory having the capacity of 700MB or larger is required.
Check the memory that can be used has the capacity of 700MB or larger and execute the auto tuning.
1 FUNCTIONS
40
1.11 Auto Tuning Function