Bosch rexroth SYDFED 2X Series Manual page 69

Fig. 32: Good control
If the control behavior is good, no measures need to be taken.
When the drive speed is changed, the pressure controller has to be adjusted as
well. For further information on this adjustment, see RE 30237-Z.
Gate time The gate time exclusively influences the D-component and reduces the sensitivity
to disturbances. These parameters are used to set the number of actual values to
be acquired. It must be noted that an increase in the gate time means a time delay
of the averaged actual value, which may, under certain circumstances, result in
phase shifting and thus in instability. Moreover, the gate time should be a multiple
of the pump pulsation (225 Hz at 1500 rpm), i.e. for
• 50-Hz machines→ gate time 4.4 ms / 8.9 ms / ... / 22.2 ms / ...
• 60-Hz machines → gate time 3.7 ms / 7.4 ms / ... / 22.2 ms / ...
Table 22: Gate time
Parameter
P-0-2960
P-0-2979
8.1.8.5 Select the active actual pressure value
Table 23: Selection of the active actual pressure value
Parameter
P-0-2950
For some applications it may be advantageous to be able to switch between two
pressure transducers. This changeover can be carried out with the help of the
pump controller control word (P-0-2950, bit 8) and in IndraWorks in the dialog
"Actual pressure value acquisition". With the factory setting, pressure feedback
value "1" is activated.
Commissioning | SYDFED-2X, SYDFED-3X, SYHDFED-1X
Pressure command value
Good control
Time
Designation
Gate time derivation actual pressure value 1
Gate time derivation actual pressure value 2
Designation
Pump controller control word
RE 30017-B, Edition 11.2021, Bosch Rexroth AG
69/96