REXRTOH VT-HPC Digital control electronics for axial piston pumps

REXRTOH VT-HPC Digital control electronics for axial piston pumps

Product positioning and core applications

VT-HPC is a digital control electronic device launched by Bosch Rexroth, specifically designed to control A4VS series axial piston pumps with HS5 adjustment mechanism, compatible with pump bodies ranging from 40 to 1000 specifications. This device integrates multiple control algorithms to achieve precise control of pump body inclination, pressure, and torque. It also supports master-slave control, leakage compensation, and other functions, and is widely used in industrial hydraulic systems.

Core functions and working principles

Basic control function

Tilt angle/flow control: The position of the pump body tilt plate is controlled by a proportional valve, and the actual value is fed back by the tilt angle sensor to form a closed-loop control.

Pressure control: relying on pressure sensors to collect data, combined with PID algorithm to achieve stable pressure regulation.

Torque limit: Calculate the actual torque by multiplying the pressure and inclination angle, and use a minimum value generator to ensure the safety of the working point.

Expansion and optional features

Support master-slave control, leakage compensation, and mooring functions to meet the collaborative requirements of complex hydraulic systems.

Optional variable speed function and PLC function based on IEC 61131-3 standard, require separate order of SD card activation.

Working mode: It can achieve combined control modes such as pressure/tilt angle, pressure/flow rate, etc. The command values can be set through bus, analog interface or internal PLC program.

Communication and Interface Specifications

communication protocol

Supports mainstream bus protocols such as Sercos, PROFINET RT, EtherCAT, EtherNET/IP, POWERLINK, etc. PROFIBUS is an optional configuration.

It can be parameterized through standard Ethernet interfaces and has integrated switch functionality.

Input/output interface parameters

|Interface Type | Quantity | Key Parameters|

|Digital input (Di) | 4 channels | High level 11-28VDC, Low level -3-5VDC|

|Digital output (Do) | 4 channels | Maximum 50mA current load, short circuit protection|

|Analog input (Ai) | 6-channel | 5-channel universal input (14 bit resolution), 1-channel tilt sensor dedicated input (13 bit resolution)|

|Analog output (Ao) | 2 channels | 16 bit resolution, supporting voltage (± 10V) or current (0-20mA) output|

Technical parameters and environmental characteristics

Electrical parameters

Supply voltage: 24VDC, allowable range 20-28VDC, maximum residual ripple 5Vpp.

Current consumption: No load 0.2-0.4A, maximum load 2.6A, requires external 4A delay fuse.

Control performance: The minimum scanning time for the tilt/pressure controller is 0.5ms, and the startup time is less than 15 seconds.

Environment and installation characteristics

Protection level IP20, working temperature range * * -20 ℃ to 60 ℃ * *, storage temperature -40 ℃ to 70 ℃.

Installation method: 35mm top cap guide rail in accordance with EN 60715 standard, vertically installed, with at least 2cm space reserved for upper and lower ventilation openings.

Anti interference capability: meets the EN 61000 series EMC standards and can resist interference such as static electricity, surges, and radio frequency radiation.

Debugging Tools and Maintenance

software tool

Use IndraWorks DS for project planning, parameter configuration, and debugging; Enabling PLC functionality requires the use of IndraWorks MLD.

Support SD/SDHC card expansion storage, with a maximum capacity of 4G, used to save parameters, programs, or update variable speed functions. The card needs to be inserted before the device is turned on.

Monitoring and Diagnosis

Built in comprehensive monitoring functions can detect issues such as undervoltage, communication failures, sensor disconnections, output short circuits, and abnormal temperature of electronic components.

Display the working status through LED indicator lights, such as bus activation status, digital I/O level status, etc.