Commissioning 37/52
RE 30214-B/03.2019, VT-MRMA1-1,
Bosch Rexroth AG
The effective pressure switch thresholds result from the lowest and highest
threshold of all absolute and relative thresholds established (see also „Pressure
switch function (14)“ on page 18). In the present example, this results in the
following:
• Lower pressure switch threshold A: 45 bar
• Upper pressure switch threshold B: 60 bar
8.1.2 Potentiometers
A total of 8 potentiometers are arranged on the front panel of the amplifier module.
Fig. 16: Arrangement of the potentiometers
The following adjustment ranges are valid for these potentiometers:
Table 31: Adjustment ranges of the potentiometers
Designation of
potentiometer
Relevant signal
Meaning
Adjustment
range
Gw
Pressure command
value
Amplitude attenuator
0 to 130 % *
Zw
Zero point calibration
±30 %
GP
Actual pressure value
Sensitivity of actual pressure
value
90 to 120 % *
ZP
Zero point calibration
±5 %
GX
Actual valve position
value
Actual valve position value
sensitivity
90 to 120 % *
ZX
Zero point calibration
±15 %
t < and t >
Pressure command
value
Ramp times (up and down)
0.1 to 100 sec
* With correctly set zero point
Use a screwdriver with a blade width of approx. 2.5 mm for adjusting the
potentiometer.
G
W
Z
W
G
P
G
X
Z
X
t <
t >
Z
P
Pressure command
value
Actual pressure value
Attenuator
Sensitivity
Zero point
calibration
Up
Down
Zero point calibration
Zero point calibration
Sensitivity
Actual valve
position value
Ramp time
