Bosch Rexroth VT-PDFE-1X Series Operating Instructions Manual page 18

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Bosch Rexroth AG, VT-PDFE-1X...; RE 29689-B/11.2019
device to the pilot valve or the pump system. In this case, any connected higher-
level control has no influence on the command value feedforward to the pump
system.
• Position extern (= external control)
With this switch position the command values are fed from the input connector of
the test device directly to the output connector of the device. This means that the
higher-level control provides the command values for the pilot valve or the pump
system, respectively. The test device merely serves as measuring instrument for
all signals.
5.2.4 Measuring points
Swivel angle
command value
Actual swivel
angle value
Error message (0 V =
error) with indicator lamp
Oil volume adjustment
(changeover) switch TD
Actual pressure
value from pressure
transducer (signal with
reference)
Voltage supply UB
Reference of UB
Ground
Fig. 4: Measuring points
The following has to be taken into account:
• The reference for the voltage supply (socket "U
TD" and "Fehler" (error) is socket "L0".
• The reference for the signal „p
• The reference for all other variables to be measured is socket "M0".
p
SOLL SOLL
p
SOLL SOLL
p
IST IST
Fehler
switch TD M0
High
p p
intern
IST IST
Low
p
extern
IST
Ein U B
nach SY DFEE
Aus
U B
L0
PE von SPS
B
High" is socket "p
ist
Pressure command
value
Actual pressure value
Reference signal M0
for analog measuring
variables
Command value
provision internal/
Sollwert-
external
vorgabe
Upper pair of sockets:
Actual pressure value
to pilot valve (signal
and reference)
Lower pair of sockets:
Actual pressure
value from pressure
transducer (signal and
reference)
") as well as the sockets "switch
Low".
ist