VT-HACD-3-2X/0-I-00/000  数字控制电子VT-HACD-3-2X

5.1 Performance description

The digital VT-HACD-3-2X serves as control electronics for up to three control loops (position, pressure, force and velocity control) with PIDT1 controller and optional state feedback in conjunction with electrohydraulic axes. It is also possible to realize an overriding control (position, pressure or force, e.g. closed-loop position control with overriding pressure/force control).

In addition, the control electronics can be used for generating, linking and normalizing signals.

The control electronics VT-HACD-3-2X offers numerous options for linking signals or implementing changeovers. Moreover, it features a parameterizable ramp function.

Configuration, parameterization and diagnostics of the VT-HACD-3-2X can be carried out using the software BODAC. For the graphical representation of recorded variables, this software works in conjunction with the visualization software

WinView.

The fields of application comprise electrohydraulic axes in machine tools, plastics processing machines, special-purpose machines, presses and transfer systems. The functions realized in these machines include sequence parameterization, positioning, pressure control, force controls and tables.

5.2 Product description

The control electronics VT-HACD-3-2X is designed for mounting on 35-mm mounting rails and complies with EMC Directive 2004/108/EC.

The micro-controller of the VT-HACD-3-2 X controls the entire process, makes adjustments and arithmetic operations and implements closed control loops. Data for configuration, command values and parameters are stored in a non-volatile flash memory

The entire configuration as well as parameterization and diagnostics are carried out using the PC program BODAC. This program can also be used for conveniently administrating machine and measurement data. Apart from the switches for address setting, the control electronics VT-HACD-3-2X does not include any additional hardware switches. The VT-HACD-3-2X must therefore be connected via a serial interface (RS232, 1:1 cable) with a PC. For parameterization and diagnostics, up to 32 electronics can be interconnected over a local bus. The configuration and consequently the creation of applications can be accomplished very easily by linking pre-defined function blocks. To this end, 32 blocks with command values, velocities and controllers are available.

Adjustments to the hydraulic drive at hand can be made in the form of area ratio adjustment, characteristic curve correction, overlap compensation, residual speed logic and zero point correction.

The following interfaces are possible between a higher-level control and the

VT-HACD-3-2X:

• Analog signals
• Digital inputs/outputs
• Serial interface
• Bus systems (PROFIBUS DP/V0; Ethernet/IP or PROFINET RT)

5.2.2 Inputs and outputs

The control electronics VT-HACD-3-2X comprises an input for two digital measuring systems SSI (binary or Gray code) or one incremental position measuring system.

You can use only SSI encoders of the same type (resolution). In addition, the control electronics features a +10 V reference voltage output as well as a serial interface RS232.

The 6 analog inputs can be software-switched between ±10 V, 0…10 V, 0…20 mA and 4…20 mA.

For the voltage inputs, the input resistance is 300 kOhm ±5 %. For all analog inputs, the operating range as well as error detection can be defined.

The VT-HACD-3-2X comprises a total of 3 analog outputs. Analog output AO1 is software-switchable between ±10 V, 0…10 V, 0…20 mA and 4…20 mA. The changeover is accomplished so that in each case the entire range of the analog/ digital converter is utilized. AO2 and A03 are firmly set to ±10 V.

The analog outputs can be adjusted in terms of gain and offset.

The VT-HACD-3-2X has 9 digital inputs and 8 digital outputs.

One input has the fixed functionality “Enable” (X2A1, enable), one digital output (X2M1, ok) the fixed functionality “OK“.

The other digital inputs are used for triggering blocks.

The function of each digital output can be determined by selection from a pre defined list:

• Command value = actual value
• Actual value higher or lower than a settable threshold
• Wait time completed
• Ramp completed
• Error flag
• Controller active
• Error flag set
• Table completed
• Absolute value higher or lower than window
• Error status
• Block timeout