Setting The Maximum Values - Bosch Rexroth VT-VSPA2-1-2X Series Manual

If command values are externally specified, the value at the measuring socket "w"
(with S+/S– at left turn) must be at least +0.3 V/–0.3 V.
option VT-.../T5 Procedure:
Prerequisite: Enable signal is connected, jumper J4 is open.
1. Read all settings on the measuring socket "v".
2. Set measuring point selector switch to "7".
3. Use potentiometer "Zw" to set the measurement signal to 0.3 V.
4. Set measuring point selector switch to "0".
5.
Use potentiometer "S+" to set the required step level.
6. Set measuring point selector switch to "7".
7. Use potentiometer "Zw" to set the measurement signal to –0.3 V.
8. Set measuring point selector switch to "0".
9. Use potentiometer "S–" to set the required step level.
10.
Use potentiometer "Zw" to set the zero point.
If command values are externally specified, the value at the measuring socket "v"
(measuring point switch position "7") must be at least +0.3 V/–0.3 V.
8.2.6
By setting the maximum values for positive and negative signals, you can correct
the characteristic curve of the command value signal and adjust it to the hydraulic
requirements (e. g. to balance the forwards and return movement).
option VT-.../T1 Procedure:
Prerequisite: Before comparing the maximum values, zero point and step levels must
be set correctly.
1. Create the command value = ±100 % externally or by command value call-up.
2.
Use the potentiometer "Gw+"/"Gw–" to set the required maximum value. Check
the setting of the measuring socket "w".
option VT-.../T5 Procedure:
Prerequisite: Before comparing the maximum values, zero point and step levels must
be set correctly.
1. Create the command value = ±100 % externally or by command value call-up.
2. Set measuring point selector switch to "7". Check at measuring socket "v" wheth-
er the measurement signal = 10 V ± 0.2 V.
3.
Use the potentiometers "Gw+"/"Gw–" to set the required maximum value. Check
the setting of the measuring socket "w".
The clock frequency of the output stage can be reached using the potentiometer "f".
The new setting can be carried out with a digital multimeter that is able to mea-
sure frequencies.
option VT-.../T1
Measuring at male multipoint connectors pin Z2 to ground Z32 or pin Z6 to ground Z32
option VT-.../T5 Measuring socket selector switch position "9"
In the condition as supplied, the setting of the clock frequency corresponds to the
requirements of the valve WRZ. Rotating the "f" potentiometer changes the valve
hysteresis and may lead to disturbing noise developments.

Setting the maximum values

RE 30110-B/11.2012, VT-VSPA2-1-2X/V0/T., Bosch Rexroth AG
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