REXROTH Fv Series, Instruction Manual

Page: 132 / 222

Group E3: PID Control
PID control is a common used process control approach suitable for flow con‐
trol, pressure control and temperature control.
Based on proportional, integral and derivative calculations of the difference
between the reference and the feedback, a negative feedback system can be
formed with the adjustment of the converter output frequency to limit the dif‐
ference from the reference. The basic control principle is shown in fig. 7-50
"Process PID control" on page 130 .
Fig.7-50: Process PID control
P represents the proportion gain, Ti represents the integral time
and Td represents the derivative time.
E3.00
PID control mode Factory Default 0
Setting range 0, 1, 2, 3, 4 Minimum unit 1
● 0: PID control inactive
● 1: Analog input + analog feedback
● 3: Analog input + pulse encoder feedback
–
In this mode, parameter ‘Control mode’ [b1.03] needs to be set as
‘0: V/F control’.
● 4: Rotation speed digital s pulse encoder feedback
–
In this mode, parameter ‘Control mode’ [b1.03] needs to be set as
‘0: V/F control’.
E3.01
Analog digital setting Factory Default 0.00 V
Setting range 0.00 − 10.00 V Minimum unit 0.01 V
Active when parameter ‘PID control mode’ [E3.00] is set to ‘2: Analog digital
s analog feedback’.
E3.02
Rotation speed digital setting Factory Default 0 rpm
Setting range 0 − 30000 rpm Minimum unit 1 rpm
● Active when parameter ‘PID control mode’ [E3.00] is set to ‘4: Rotation
speed digital s pulse encoder feedback’.
● In closed loop PID control, configuration of reference, feedback and
control mode is shown in fig. 7-51 "Configuration in closed loop PID
control" on page 131 .
Bosch Rexroth AG DOK-RCON02-FV*********IB01-EN-P
Rexroth Frequency Converter Fv
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Parameter Settings