Mitsubishi Electric MELSEC iQ-R Series User Manual page 124

■Stop conditions for the feed forward control and set value (SV) restoration adjustment
• The proportional band (P) is changed.
• The integral time (I) is changed.
• The derivative time (D) is changed.
• The output limiter is changed.
• The overlap/dead band setting is changed in the heating-cooling control.
• The control response parameter is changed.
• The set value (SV) is changed.
• The sensor correction value and the primary delay digital filter setting are changed.
• The disturbance judgment position is changed.
The following figure shows the stop caused by the change of the integral time (I), derivative time (D), or the output limiter.
Forced starting signal
Set value (SV)
Disturbance
judgment position
FF value addition
(1)
(1) Even though the following items are changed in this area, the operation does not stop. However, when the integral time (I) and derivative time (D) have been
set to 0, the operation stops.
• Integral time (I)
• Derivative time (D)
• Output limiter
(2) When the following items are changed in this area, the operation stops.
• Integral time (I)
• Derivative time (D)
• Output limiter
When a feed forward value has been applied by 'CH1 Feed forward control forced starting signal' (Un\G559),
the operation does not stop even though the integral time (I), derivative time (D), and output limiter are
changed.
1 FUNCTIONS
122
1.35 Disturbance Suppression Function
Bottom value detection
Disturbance judgment
position exceeded
(2)