12.9.5 PID Feedforward Control
Code Name Setting range Default Min. Attri.
E4.19 PID feed forward dynamic limit 0.00...100.00 % 10.00 0.01 Run
E4.20 PID feed forward limit offset 0.00...100.00 % 2.00 0.01 Run
E4.33 PID feedforward settings 0: Inactive; 1: Active 0 - Stop
PID feedforward controls the process item through amending the output fre-
quency setting with the fine tuning signal of PID output. Before using this func-
tion, users need set [E4.00] ≠0, and E4.33 should be set refer to the following
choice:
0: PID feedforward inactive. If [E4.00] ≠0, the given frequency is set by PID out-
put.
1: PID feedforward activate. If [E4.00] ≠0, the given frequency is set by the re-
sult of PID output plus the main frequency setting; the given frequency is set by
parameter E0.00 "First frequency setting source", and be obtained through Acc /
Dcc module.
Fig. 12-46: PID feedforward
The parameters E4.19 and E4.20 are both used for limitating the value of PID
feedforward. E4.19 is the percentage relative to the main frequency, and E4.20
is the percentage relative to E0.08.
So, the range of PID feedforward frequency is:
-Min{[E4.19] ╳ Main frequency + [E4.20] ╳ [E0.08], [E0.09]}…Min{[E4.19] ╳
Main frequency + [E4.20] ╳ [E0.08], [E0.09]}
EFC x610 Series
Bosch Rexroth AG
Functions and Parameters
DOK-RCON03-EFC-X610***-IT05-EN-P
191/389
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