Wecon LX3V-2DAI-BD User manual

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