Code Name Setting range Default Min. Attri.
F3.13 Integral time 1 [0] 0...999 ms 80 1 Run
F3.14 Integral time 2 [0] 0...999 ms 0 1 Run
F3.15
Integral time TI switch thresh-
old [0]
-150.0...0.0 bar (the switch-
ing function is invalid when
the setting is 0.0)
0.0 0.1 Run
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 Setting range Default Min. Attri.
F3.16 Differential gain [0] 0.000...10.000 (rpm/bar)*s 0.000 0.001 Run
F3.17 Filter time for Kd [0] 0…999 ms 35 1 Run
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-
FcP 5020
Bosch Rexroth AG
Block Diagram of Main Functions
DOK-RCON03-FCP5020****-QU04-EN-P
31/83
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