Mitsubishi Electric MELSEC iQ-R Series User Manual page 121

Parameters and buffer memory addresses
The following shows the parameters and buffer memory addresses to be set in the disturbance suppression function.
• "Disturbance judging position" of "Disturbance suppression function" in "Application Setting"
• "Set value (SV) restitution adjustment" of "Disturbance suppression function" in "Application Setting"
• 'CH1 Feed forward value' (Un\G560) ( Page 308 CH1 Feed forward value)
• 'CH1 Feed forward value tuning selection' (Un\G561) ( Page 309 CH1 Feed forward value tuning selection)
Setting method
1.
Set "Target Value(SV) Setting" of "Control basic parameters" in "Application Setting" and PID constants.
[Navigation window]  [Parameter]  Target module  [Application Setting]  [Control basic parameters]
For the setting calculation of PID constants, the auto tuning can be executed.
2.
Set "Disturbance judging position" and "Set value (SV) restitution adjustment" of "Disturbance suppression function" in
"Application Setting."
[Navigation window]  [Parameter]  Target module  [Application Setting]  [Disturbance suppression function]
• Set the deviation (Set value (SV) - Process value (PV)) for "Disturbance judging position." ( Page 306 CH1 Disturbance
judgment position)
• Set a return action to be taken when the temperature process value (PV) returns to the set value (SV) from the temperature
fall caused by disturbance for "Set value (SV) restitution adjustment." ( Page 307 CH1 Set value return adjustment)
3.
Set 'CH1 Feed forward value tuning selection' (Un\G561) to Automatic-setting (1) and start the control. ( Page 309
CH1 Feed forward value tuning selection)
4.
After the start of the control, the feed forward value is automatically calculated by giving a disturbance. During the
automatic calculation, CH1 Feed forward value tuning status (Un\G416, b1) is ON. ( Page 241 CH1 Feed forward
value tuning flag)
5.
CH1 Feed forward value change flag (Un\G416, b0) is turned ON and the turning ends. ( Page 241 CH1 Feed
forward value tuning flag)
After the completion of the turning, set 'CH1 Feed forward value tuning selection' (Un\G561) to No automatic-setting (0). (
Page 241 CH1 Feed forward value tuning flag)
Turning from OFF to ON 'Setting value backup command' (Y8) is not required because the calculated feed forward value is
automatically backed up.
When the tuning ends in failure, CH1 Feed forward value tuning error flag (Un\G416, b8) is turned ON. (
Page 241 CH1 Feed forward value tuning flag)
1 FUNCTIONS
1.35 Disturbance Suppression Function
1
119