Bosch Rexroth Sytronix FcP 5020 Quick Start Manual page 32

Bosch Rexroth AG
Block Diagram of Main Functions
Code Name
F3.13 Integral time 1 [0]
F3.14 Integral time 2 [0]
Integral time TI switch thresh-
F3.15
old [0]
Tab. 7-10: Parameter list of p/Q PID controller integral time setting
The parameters in the table above are used to set the integral time of p/Q PID
controller. Higher integral time will slow down the pressure loop system re-
sponse which causes the slower pressure system response against external dis-
turbance but will result in the higher system stability. Both integral time TI_1 and
TI_2 can be used as time constant at integral stage. Based on the pressure dif-
ference (pressure command - pressure feedback), the system will switch to a
suitable integral time.
Fig. 7-10: p/Q PID integrator switching
When the integral time TI switching threshold is set to 0, the switch-
ing function is inactive, TI_1 is fixed for integral time.
Code Name
F3.16 Differential gain [0]
F3.17 Filter time for Kd [0]
Tab. 7-11: Parameter list of p/Q PID controller differential gain setting
The parameter F3.16 is used to set differential gain of p/Q PID controller. The
greater the differential gain, the less the system pressure overshoot, but the
slower the pressure response. Excessively large differential gain would affect the
system stability.
The parameter F3.17 is used to set the filter time of p/Q PID controller at differ-
ential stage. Setting this parameter properly can help to suppress the high fre-
28/75
Setting range
0...999 ms
0...999 ms
-150.0...0.0 bar (the switch-
ing function is invalid when
the setting is 0.0)
Setting range
0.000...10.000 (rpm/bar)*s
0...999 ms
Default Min.
80 1
0 1
0.0 0.1
Default Min.
0.000 0.001
35 1
DOK-RCON03-FCP5020****-QU02-EN-P
FcP 5020
Attri.
Run
Run
Run
Attri.
Run
Run