Bosch Rexroth A4CSG - Page 74

74/104 Commissioning
Bosch Rexroth AG, A4... with HS5E pilot control valve/Series 3x, RE 92076-01-B/10.2017
Fig. 26: Damped oscillation
Step Behavior/result Measure
1 Slow response Check the value of the dead volume (P-0-2813) and correct
it if necessary.
2 Response is still slow Increase P-gain (P-0-2809); if necessary, reduce D component
positive (P-0-2816)
3 Response is still slow Reduce the integration time (P-0-2806.0.4)
Fig. 27: Unstable control
Step Behavior/result Measure
1 Rapid but unstable
response
Check the value of the dead volume (P-0-2813) and correct
it if necessary.
2 Reduce P-gain (P-0-2809); if necessary, reduce D component
3 Increase the integration time (P-0-2806.0.4)
4 Reduce parameter for feedback derivation actual pressure
value (P-0-2812)
Pressure
Time
Pressure command value
Actual pressure value
Slow control
Pressure
Time
Pressure command value
Actual pressure value
“Unstable” control