Bosch Rexroth VT-MRMA1-1, Руководство по эксплуатации

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Commissioning 41/52
RE 30214-B/03.2019, VT-MRMA1-1, Bosch Rexroth AG
Table 34: Setting steps
No. Signal
Adjustment
element Setting
4 20 % actual
pressure value
Zx
= 1
Zp
v
The pressure command value must have been calibrated according to the above
procedure!
1. Connect the electrical system of the valve.
2. Measure the position transducer supply voltage on the module side between terminal
4 and 3: +10.0 V ±300 mV
3. Set the external pressure command value feedforward to 20 %.
4. Apply an external enable signal.
For adjusting Zw, potentiometer Gw must not be turned to the left-hand limit stop (=
0 %)!
5. Use ZX to set the actual pressure value (= voltage between terminal 2 and 1) to 20 %
of the nominal pressure value:
Pressure transducer
Output signal (20 %) Voltage terminal 2 and 1)
“0.5 - 5 V“ output +1.40 V +1.40 V
“4 - 20 mA“ output +7.2 mA +0.72 V (R
load
= 100 Ω)
6. Set measuring point selector switch to 1.
When adjusting Zp, potentiometer Gp must not be turned to the left-hand limit stop (= 0 %)!
7. Use zero potentiometer ZP to calibrate the measuring signal at test jack v: +2.00 V ±5 mV.
5 Maximum value
of pressure
command value
Gx
= 1
GP
Before adjusting the maximum value of the actual pressure value, the adjustment of the
20 % actual pressure value must have been completed!
1. Set the external pressure command value feedforward to 100 %.
2. Apply an external enable signal.
3. Use GX to set the actual pressure value signal (= voltage between terminal 2 and 1) to
100 % of the nominal pressure value:
Pressure transducer
Output signal (100 %) Voltage terminal 2 and 1)
”0.5 - 5 V“ output +5.00 V +5.00 V
“4 - 20 mA“ output +20 mA +2.00 V (R
load
= 100 Ω)
6. Set the measuring point selector switch to 1.
7. Use potentiometer GP to calibrate the measuring signal at test jack v: +10.00 V ±5 mV.
6 Actual pressure
value 1. Check the two working points (step 4 and 5)
2. If required, repeat steps 4 and 5
7 Maximum value
of pressure
command value
(individual)
= 0
Gw
v
1. Set the external pressure command value feedforward according to your individual
requirements.
Example: Reduce external pressure command value from 100 % to 80 %
2. Set the external pressure command value feedforward to 100 %.
3. Turn the measuring point selector switch to 0.
4. Use potentiometer GW to adjust the measuring signal at test jack v according to your
individual requirements.
Settings according to the example: 8 V ±5 mV (= 80 %)
8.4 Application example
The clamping pressure is to be adjusted while the workpiece is clamped.
• The current pressure command value is applied
• Pressure switch signals A and B are available (24 V at terminals 13 and 14)
• Signal “ready” is present (24 V at terminal 10)
• Signal “position command value reached” is present (24 V at terminal 9)
• Signal “enable” is not set (0 V at terminal 7)
The following explanations with regard to signals apply to the sequence program.
They are used for synchronizing the amplifier module with the higher-level control:
• Enable input (24 V input):
Target
Preconditions
Notes on the sequence
program