Mitsubishi Electric MELSEC iQ-R Series User Manual page 122

Operating condition
When the following conditions are satisfied, the functions can be executed.
■Operating conditions for only the feed forward control
• CH1 Feed forward value tuning status (Un\G416, b1) is not ON.
• The feed forward value is not 0.
■Operating condition for only the set value (SV) restoration adjustment
A value of 1 or larger has been set for the set value (SV) restoration adjustment.
■Operating conditions for the feed forward control and set value (SV) restoration adjustment
• The control is being executed.
• The AUTO mode is activated.
• The disturbance judgment position is not 0.
• The PID control has been set. (All of the proportional band (P), integral time (I), and derivative time (D) are not 0.)
• The set value (SV) has not been changed (Even when the setting variation rate limiter has been set, the set value (SV) has
not been changed according to the variation rate).
• The temperature is not out of the temperature measuring range.
• The self-tuning is not being executed.
• The output variation limiter is 0.
• The simultaneous temperature rise is not being executed.
• The overshoot suppression function is not operating.
Startup conditions
The following control or function is started when the operating conditions have been satisfied and the following startup
conditions are satisfied.
■Startup conditions of the feed forward control
• With 'CH1 Feed forward control READY flag' (Un\G417) ON, the deviation exceeds the disturbance judgment position.
• With 'CH1 Feed forward control forced start READY flag' (Un\G418) ON, 'CH1 Feed forward control forced starting signal'
(Un\G559) is set to Feed forward control forced start (1).
■Startup condition of the set value (SV) restoration adjustment
The deviation (E) exceeds the disturbance judgment position.
1 FUNCTIONS
120
1.35 Disturbance Suppression Function