12.9.4 PID Regulation Mode Setting
Code Name Setting range Default Min. Attri.
E4.30 PID deadband 0.0...20.0 % 2.0 0.1 Run
This parameter is used to set the limit of the deviation between reference and
feedback value. When the difference is within the defined 'PID deadband', PID
control stops to bring a stable output.
Code Name Setting range Default Min. Attri.
E4.31 PID regulation mode 0, 1 0 – Run
When the PID output reaches [E0.09] 'Output frequency high limit' or [E0.10]
'Output frequency low limit' in PID control, following modes are available for PID
regulation:
● 0: Stop integral regulation when frequency arrives at upper / lower limit
When the difference between the reference values and the feedback values
changes, the integral value follows immediately the difference. When the set-
ting frequency reaches the limits, the integration stops, and the integral value
remains unchanged.
This mode is used in applications with fast change reference values.
● 1: Continue integral regulation when frequency arrives at upper / lower limit
When the PID output reaches the limits, the integral continues up to its possi-
ble numerical limit.
This mode is used in applications with stable reference values. When the dif-
ference between reference and feedback changes, more time is needed to
eliminate the impact of accumulated integral regulation before the integral
value can follow the change in the trend.
Bosch Rexroth AG
Functions and Parameters
EFC x610 Series
190/389
DOK-RCON03-EFC-X610***-IT05-EN-P
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