Group E3: Pid Control - Bosch Rexroth EFC 3600 Operating Instructions Manual

DOK-RCON03-EFC-3600***-IT01-EN-P
Rexroth Frequency Converter EFC 3600
1. If the running time of a stage is set to be 0, simple PLC will skip this
stage.
2. PID control mode has higher priority compared with Simple PLC con‐
trol. That is, if the PID control mode is active, then Simple PLC con‐
trol will be disabled internally. So, the precondition of running Simple
PLC is to disable PID control.
3. PLC can be paused / prohibited by external terminals and PLC cy‐
cle / phase completion can be signalised by digital output. See more
details in parameter [E0.01]~[E0.05] and [E1.00]~[E1.02].
Rotation direction command source differs if running command source is different, as
shown in the table below:
Frequen‐ RUN command
cy source source
Via operating panel
Multi-
speed
Via external termi‐
nals
Via communication
Via operating panel
Simple Via external termi‐
PLC nals
Via communication
Fig.8-4: Rotation direction and Acc. / Dec. for multi-speed / Simple PLC
8.9

Group E3: PID Control

PID control is a common approach used in process controls such as flow control, pres‐
sure control, temperature control and other process controls. Proportional, integral and
derivative operations are based on the differences between reference values and their
feedback, to adjust the output frequency of the frequency converter, form a negative
feedback system, and keep the controlled values stable at reference values.
The basic control principle is shown as the figure below:
Rotation direction
Function codes:
[E2.35], [E2.37], [E2.39], [E2.41],
[E2.43], [E2.45], [E2.47], [E2.49]
External terminals, that is, 2-wire /
3-wire control mode
Set by communication
Function codes:
[E2.35], [E2.37], [E2.39], [E2.41],
[E2.43], [E2.45], [E2.47], [E2.49]
Bosch Rexroth AG
Parameter Settings
Acc. / Dec. time
Function codes:
[E2.35], [E2.37],
[E2.39], [E2.41],
[E2.43], [E2.45],
[E2.47], [E2.49]
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