Wecon LX3V-2TC-BD User guide

WECON
LX3V-2TC-BD
Module
Website: http://www.we-con.com.cn/en
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LX3V-2TC-BD
1 WECON Technology Co., Ltd.
1.Mounting instruction
Before the installation must be ensure that the PLC host and BD associated equipment power off.
Please install the BD module in the corresponding position of the PLC, and lock the four standard screws. If
environmental dust is bigger, please cover BD right part by PLC’s cover. Please do not power operation.
Caution
1) This BD module only support the following firmware versions or later. Users can check the PLC
firmware version in D8001.
LX3VP:25103;
LX3V-A2:25015;
LX3V-LX3VE:25201;
A1:22007;
LX2VA:24006;
When mounting module to PLC, all the lights are blinking after power ON PLC please
upgrade the firmware of PLC.
2) Please fixed BD module on the PLC, poor contact may lead to failure.
3) BD module and top cover of PLC’s tightening torque is 0.3 ~ 0.6 N.m.
Warring
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-2TC-BD module equips with 2 channels analog output. This module will be mounted in the
PLC, so there is no need to change the installation area of the PLC.
2) The type to AD convert of LX3V-2TC-BD is a thermocouple input type (K/J), and the converted
digital value of each channel is stored in special registers, but the mode of analog-to-digital
conversion cannot be changed. The corresponding channel as following table shows.
Table 2-1 LX3V-2TC-BD address assignment
Extension port 1 (far away from PLC LED)
Extension port 2 (near PLC LED)
Address
Description
Address
Description
M8112
The flag of thermocouple switch in
CH1
OFF: K type
ON: J type
M8116
The flag of thermocouple switch in CH1
OFF: K type
ON: J type

LX3V-2TC-BD
2 WECON Technology Co., Ltd.
M8113
The flag of thermocouple switch in
CH2
OFF: K type
ON: J type
M8117
The flag of thermocouple switch in CH1
OFF: K type
ON: J type
D8112
CH1 temperature (unit: 0.1)
D8116
CH1 temperature (unit: 0.1)
D8113
CH2 temperature (unit: 0.1)
D8117
CH2 temperature (unit: 0.1)
3.Dimension
Table 3-1
LED lights indicating
1) LED1: ON when power ON.
2) LED2: flashes when communications.
3) LED3 (TC 1): On indicates enable, OFF indicates disable, flicker indicates exceeding the
measurement range.
4) LED4 (TC 2): On indicates enable, OFF indicates disable, flicker indicates exceeding the
measurement range.
If the BD module is plugged into the old firmware version when on the host, all LEDs will be flashing.
4.Specifications
1) Please refer to the LX3V user manual for the general specification of LX3V-2TC-BD.
2) LX3V-2TC-BD is powered supply by LX3V main unit.
Table 4-1
Item
Explanation
Analog circuitry
DC 24V ±10%, 70mA
Digital circuitry
DC 5V, 90mA (From the PLC internal power supply)
Applied sensor: 2-wire thermocouple(K/J)
L1+
Positive pole of CH1’s sensor
L1-
Negative pole of CH1’s sensor
FG
None
L2+
Positive pole of CH2’s sensor
L2-
Negative pole of CH2’s sensor

LX3V-2TC-BD
3 WECON Technology Co., Ltd.
Temperature
Read data by buffers
Analog input signal
Thermocouple: K or J type (2 channels)
Range of rated
temperature
K
-100℃- 1200℃
J
-100℃- 600℃
Digital output
K
-1000 - 12000
J
-1000 - 6000
12 bits total
Accuracy
K
0.4℃
J
0.3℃
Overall accuracy
±0.5%
Conversion rate
50ms*2
Conversion characteristics
Note: Ground-type thermocouple (3-wire) is not supported in this BD module.
5.Wire
Warning
Make sure cut off the electricity before installation/disassembly, to prevent electric shock or product
damages.
Caution
1) Stay away from high-voltage cables to avoid interference or surge;
2) Grounding is required, but please do not share the ground site with high-voltage cable;
3) Do not weld any cable ends, and make ensure that the number of connecting cables, no more
than a predetermined number;
4) Do not connect a substandard cable;
5) Fixed cable;
5.1 Suitable cable
Use AWG25-16 to connect the output equipment
The maximal screwing torque is from 0.5 to 0.6N.m
Table 5-1
Line type
Cross sectional area(mm2)
End-of-pipe treatment

LX3V-2TC-BD
4 WECON Technology Co., Ltd.
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 Input
Figure 5-1
6.Examples
The analog values of each channel are transfer to digital values and stored in D8112&D8113.
6.1 Basic Program Examples
Set CH1 and CH2 as thermocouple input mode, and stored value in D0 and D2.
6.2. Examples of Applications
Since the LX3V-2TC-BD does not have offset and gain functions, if it needs for the values out of the
standard specifications, Additional programming orders will be needed to multiply or divide the converted
value.
Caution
Since the use of additional programming orders, the converted precision and resolution of the analog
Set CH1 as K-type thermocouple input mode
Set CH1 as K-type thermocouple input mode
Set the digital value of D0 into analog value
Set the digital value of D2 into analog value

LX3V-2TC-BD
5 WECON Technology Co., Ltd.
value are different with the specifications.
The original range of the analog output does not change.
Thermocouple input mode
In Thermocouple input mode, LX3V-2TC-BD covert an analog value to a digital value in degrees Celsius.
If in the program is Fahrenheit as a unit it needs to be converted to Celsius value.
Fahrenheit and Celsius conversion formula, Fahrenheit = Celsius * 9/5 + 32, the unit is 0.1 ℃.
D10=D8112*9
D12=D10/5
D0=D12+320
D0=D8112*9/5+320