RE 30017-B, Edition 11.2021, Bosch Rexroth AG
Product description |
SYDFED-2X, SYDFED-3X, SYHDFED-1X
23/96
Table 8: Controller parameters for different oil volumes
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.
5.3.4 Special operating modes
This chapter describes certain applications. In these cases, the basic operating
modes (see page 21) are active.
For starting up SY(H)DFED systems, no hydraulic circuit needs to be provided for
the classical start-up at zero pressure.
When small command values for pressure and swivel angle are provided, starting
up under almost no-load conditions is possible.
In the case of systems with internal supply and without pre-load valve, hydraulic
circulation circuits must be dimensioned so that a minimum pressure of between 8
and 12 bar is available, because the pump requires this pressure level to be able
to respond to electrical control signals.
Operating mode of the pump, in which an operating point is steadily closed-loop-
controlled with a corresponding command value over a longer period of time.
Observe the notes on permissible pressures in chapter 5.3.6 “Internal/external
pilot oil“ (page 27).
Operating mode of the pump that refers to the smallest achievable swivel angle
and to which the pump usually changes over when no closed-loop control is active.
Oil volume [l]
Controller parameters
Universal
(default
setting)
0 l
1 l
2.5 l
5 l
7.5 l
10 l
Pressure controller P-gain 1 positive (P-0-2963) 2.8
2.8
4.3
4.3
4.7
5
4.3
Pressure controller P-gain 1 negative (P-0-2964)
2.8
2.8
4.3
4.3
4.7
5
4.3
Pressure controller pos. factor for
D-component, parallel
(P-0-2969)
0.19 s
0.04 s
0.2 s
0.31 s
0.41 s
0.44 s
0.45 s
Pressure controller neg. factor for
D-component, parallel
(P-0-2970)
0.23 s
0.04 s
0.2 s
0.31 s
0.41 s
0.44 s
0.45 s
Pressure controller time constant swivel angle
feedback (P-0-2971)
0.07 s
0.04 s
0.07 s
0.07 s
0.075 s
0.05 s
0.06 s
Gate time derivation actual pressure value 1
(P-0-2960)
22.5 ms
13.5 ms 13.5 ms 22.5 ms 22.5 ms 22.5 ms 22.5 ms
Oil volume
[l]
Controller parameters
12.5 l
15 l
20 l
25 l
30 l
40 l
Pressure controller P-gain 1 positive (P-0-2963)
4.4
4.4
3.8
3.6
3.6
3.5
Pressure controller P-gain 1 negative (P-0-2964)
4.4
4.4
3.8
3.6
3.6
3.5
Pressure controller pos. factor for D-component, parallel
(P-0-2969)
0.52 s
0.535 s
0.59 s
0.68 s
0.7 s
0.72 s
Pressure controller neg. factor for D-component, parallel
(P-0-2970)
0.52 s
0.535 s
0.59 s
0.68 s
0.7 s
0.72 s
Pressure controller time constant swivel angle feedback
(P-0-2971)
0.07 s
0.07 s
0.07 s
0.07 s
0.07 s
0.07 s
Gate time derivation actual pressure value 1 (P-0-2960)
22.5 ms
22.5 ms
22.5 ms
22.5 ms
22.5 ms
22.5 ms
Starting up at zero
pressure
Circulation operation
(by-pass filtration,
cooling)
Stand-by operation
Zero stroke operation
