REXROTH Fv Series, Instruction Manual

Page: 133 / 222

PID
control mode
Reference Feedback
Converter
control mode
[E3.00]=1 External analog input
External analog
signal feedback
[b1.03]=0, 1, 2
0 or 1 in most cases
[E3.00]=2
Analog digital setting
[E3.01] External analog
signal feedback
[E3.00]=3 External analog input
Pulse encoder
feedback
[b1.03]=0
(V/F control)
[E3.00]=4
Rotation speed digital
setting [E3.02] Pulse encoder
feedback
Fig.7-51: Configuration in closed loop PID control
E3.03
Analog feedback channel Factory Default 0
Setting range 0, 1 Minimum unit 1
● 0: Feedback is via teI in PID control.
● 1: Feedback is via terminal VR2 in PID control.
E3.04
P: Proportional gain Factory Default 1.500
Setting range 0.000 − 10.000 Minimum unit 0.001
E3.05
Ti: Integral time Factory Default 0.00s
Setting range
0.00 − 100.00s
(0.00 represents no integral)
Minimum unit 0.01s
E3.06
Td: Derivative time Factory Default 0.00s
Setting range
0.00 − 100.00s
(0.00 represents no derivative)
Minimum unit 0.01s
E3.07
T: Sampling period Factory Default 0.50s
Setting range 0.01 − 100.00s Minimum unit 0.01s
Used to set PID control parameters.
●
P: Proportional gain
–
Used to eliminate deviation
–
Larger P means larger scale and faster response, but too
large P leads to oscillation.
– P cannot eliminate deviation,.
● Ti: Integral time
–
Used to eliminate deviation
–
Smaller Ti means faster response of converter to deviation
changes, but too mall Ti leads to oscillation.
● Td: Derivative time
–
Used to respond fast to changes of deviation between reference
and feedback exists in the system.
–
Larger Td means faster response, but too large Td leads to
oscillation.
DOK-RCON02-FV*********IB01-EN-P
Rexroth Frequency Converter Fv Bosch Rexroth AG 131/219
Parameter Settings