Cervis TM70 Manual de Instalação descarregar pdf (Página 82)

TM70/3-10 & i-Kontrol Console RC System

U035.3-TM70_Console_Sys

24.0 A2VCAN Option

The A2VCAN expansion board provides an analog voltage that can be used to control external

devices such as frequency drives with voltage control; electro-hydraulic proportional valves with

input reference voltage; etc. The board provides two (2) output stages Galvanically isolated from

each other and from the control common logic (see Figure 49).

Figure 49. A2VCAN Block Diagram

The A2VCAN two analog outputs, dependent on the supply voltage and controlled by CANopen

interface, can provide 10 bit (1024 steps) resolution. It has its own microprocessor (µP)

providing the following functions:

• LR72 communication through CANopen protocol using the standard 401, input/output-

digital/analog protocol CIA DS4011—CANopen Device Profile for Generic I/O Modules.

• Provides two (2) analog voltage outputs per programmed setting for each output.

24.1 Output Response Curves

The A2VCAN expansion board has two (2) types of response curves for each output:

• Linear, where the response of the analog output is proportional to the input

• Non-linear, where the response of the analog output is exponential to the input. Variations

of joystick input at the beginning of movement result in small changes of output, while the

same joystick input variations result in major changes in the output current towards the end

of the joystick movement.

Choice of response curve is made by changing parameter P — changed by programming the

EEPROM or by Tele-Alignment — where 0 represents a linear response and 1, 2, or 3 is chosen

for an exponential response (from low to high, respectively). Selection can also be programmed

according to the rise and fall for each semi-axis. Ramp Response is found under defined output

type as Linear or Nonlinear.

CAN bus

CANopen

Protocol

LR72

Receiver

Logic

Board

VPP2

GND2

VO2

VR2

VPP1

GND1

VO1

VR1

OUTPUT1 VO1

CONTROL LOGIC BOARD ( µP )

+ Vi

OUTPUT2 VO2

ISP

1 2 ... 77 78 79 80 81 82 83 84 85 86 87 ... 102 103

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Cervis TM70 Manual de Instalação Página 82

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