Wecon LX3V-2DAI-BD Manuale utente

LX3V-2DAI-BD

User manual

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LX3V-2DAI-BD

1 WECON Technology Co., Ltd.

1.Mounting instruction

Before the installation make sure that the PLC host and the equipment connected to BD module

have been powered off. Please install the BD module in the corresponding position of the PLC, and

lock the two standard screws.

Caution

1) This BD module only support the following firmware versions or later. Users can check the PLC

firmware version in D8001.

LX3VP:25103;

LX3VE: 25201;

LX3V-A2:25014;

LX3V-A1: 22006;

When mounting module to PLC, all the lights are blinking after power ON PLC please purchase

new PLC.

2) When output current, make sure that the load resistance should be less than 500Ω, otherwise

the output will be lower.

3) Please fixed BD module on the PLC, poor contact may lead to failure.

4) BD module and top cover of PLC’s tightening torque is 0.3 ~ 0.6 N.m.

Warning

Make sure to power off the PLC before mounting or removing the BD module and put the cover in

right place.

2.Special feature

1) LX3V-2DAI-BD module equips with 2 channels analog output. This module will be mounted in

the PLC.

2) The output current of LX3V-2DAI-BD module between 4 to 20mA, and the digital value will be

saved in special system address, but the numerical relationship between input and output value

cannot be changed.

Table 2-1

Expansion port 1 (far away from PLC light)

Address

Description

LX3V-2DAI-BD

2 WECON Technology Co., Ltd.

M8112

The flag of switching output mode in CH1

OFF: Current input mode (4mA~20mA, 0~2000)

ON: Retain

M8113

The flag of switching output mode in CH2

OFF: Current input mode (4mA~20mA, 0~2000)

D8112

The digital value of channel 1; (4mA~20mA, 0~2000)

D8113

The digital value of channel 2; (4mA~20mA, 0~2000)

Expansion port 2 (near the PLC light)

Address

Description

M8116

The flag of switching output mode in CH1

OFF: Current input mode (4mA~20mA, 0~2000)

ON: Retain

M8117

The flag of switching output mode in CH2

OFF: Current input mode (4mA~20mA, 0~2000)

D8116

The digital value of channel 1; (4mA~20mA, 0~2000)

D8117

The digital value of channel 2; (4mA~20mA, 0~2000)

3.Dimension

Table 3-1

LED lights indicating

1) LED1: ON when power ON.

2) LED2: flashes when communications.

3) LED3 (AD 1): On indicates enable, OFF indicates disable, flicker indicates exceeding the

measurement range.

4) LED4 (AD 2): On indicates enable, OFF indicates disable, flicker indicates exceeding the

measurement range.

IN-2DAI Output current range: 4~20mA

Io1+

Anode of the channel 1 current output

Io1-

Cathode of the channel 1 current output

•

No connection

Io2+

Cathode of the channel 2 current input

Io2-

Cathode of the channel 2 current output

LX3V-2DAI-BD

3 WECON Technology Co., Ltd.

If the BD module is plugged into the old firmware version when on the PLC, all LEDs will be flashing.

4.Specification

1) Please refer to the LX3V user manual for the general specification of LX3V-2DAI-BD.

2) LX3V-2DAI-BD is powered supply by LX3V main unit.

Table 4-1

Specification

item

Current output

Input range

DC4~20mA (Load resistance should be less than 500Ω)

Digital output

12 bits binary

Resolution

8uA[4mA-20mA/2000]

Precision

±1%

AD conversion time

One PLC scanning cycle

Characteristic

Insulation

No insulation in each PLC channel

Occupied points

Zero point

5.Wiring

Caution

1) Don’t put the LX3V-2DAI-BD module near high-voltage power cable. Keep away the power cable

at least 100mm;

2) Do not solder any terminal with the others device;

3) Do not connect any unsuitable cable;

4) Please fix cable;

5) Do not connect any unit to the unused terminal;

LX3V-2DAI-BD

4 WECON Technology Co., Ltd.

5.1 Suitable cable

Connect to output device with AWG25-16.

Max tighten torque of terminal is 0.5 to 0.6N.m.

Table 5-1

Line type

Cross sectional

area(mm2)

End-of-pipe treatment

AWG26

0.1288

Stranded cable: stripped jacket, rub

Conductor, then connect the cable.

Single-core cable: stripped jacket, Then

connect the cable.

......

AWG16

1.309

5.2 Output mode

6.Example

The analog value (4~20mA) in each channel will be saved in system address (D8112, D8113). It will

be saved automatically when “END”, and convert into digital value.

6.1 Basic program

Caution

1) Trigger M8122 and M8113, and set the characteristic of conversion.

2) Do not change the value of D8112 and D8113.

D/A conversion

LX3V-2DAI-BD

5 WECON Technology Co., Ltd.

6.2 Application example

Because the LX3V-2DAI-BD has no offset and gain functions, additional programming commands are

required to multiply or divide the conversion value for outside the standard specifications values.

Caution

1) There are extra program for multiplication and division, so the real accuracy and resolution of

D/A conversion are different from product specifications;

2) The range for analog output is constant;

Current output mode

In current output mode, it changes the digital value (0-2000) to analog value (4-20mA). If the real

digital range is 0-A (A means any value), it must be converted to 0-2000, as the following program

shows, the final digital need to be saved in D8112.

Figure 6-1

Suppose user needs 0-A digital range.

D8114=2000*D0/A

=2000*D0/10000 (A=10000)

=D0/5

Set channel 1 as current output (4~20mA)

Set channel 2 as current output (4~20mA)

Save the value of D0 to channel 1

Save the value of D2 to channel 2

LX3V-2DAI-BD

6 WECON Technology Co., Ltd.

Version: V1.0.1

Date: Feb 2018

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