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Product description | SYDFED-2X, SYDFED-3X, SYHDFED-1X
5.9
MASTER/SLAVE OPERATION
p,Q
p
u(i)
( ist oder aktuelle Menge)
MASTER
Schwenkwinkel
Druck-
Sollwerte
Fig. 12: Hydraulic coupling of SY(H)DFED control systems
Theoretically, an optional number of SY(H)DFED control systems can be
hydraulically coupled to achieve greater flows.
In this case, it is just required to determine a master pump to which the pressure
transducer has to be connected.
The master then controls both, pressure and swivel angle, in accordance with the
externally provided command values and passes its actual swivel angle value on to
the slave pumps. Based on this input the slave pumps calculate their own swivel
angle command value. This ensures smooth and synchronous swiveling of the
pumps.
5.9.1
Circuitry of SY(H)DFED
The two figures below show the circuitry for master/slave operation with analog
signals. Alternatively, master/slave operation can also be set up via a field bus
system and the machine control. For detailed information, see the functional
description of the firmware used.
U
B
0 V
α
(I)
comm
p
(I)
comm
P
U
Fig. 13: Circuitry of SY(H)DFED for master/slave operation (analog)
(
)
soll
SLAVE
1
1 U
B
2 L0
4 M0
5 α
comm
α
6
act
7 p
comm
10 p
- high
act
11 p
- low
act
Master
RE 30017-B, Edition 11.2021, Bosch Rexroth AG
33/96
(
)
soll
SLAVE
n
SYD_022
1 U
B
2 L0
4 M0
5 α
comm
7 p
comm
10 p
- high
act
11 p
- low
act
Slave
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