Skip to Content

Wiki source code of LX3V-2TC

Last modified by Wecon on 2025/09/03 21:02
Show last authors
1 = **1 Mounting instruction** =
2
3 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.
4
5 **Caution**
6
7 This BD module only support the following firmware versions or later. Users can check the PLC firmware version in D8001.
8
9 * LX3VP:25103;
10 * LX3VE: 25201;
11 * LX3V-A2:25014;
12 * LX3V-A1: 22006;
13 * LX2V: 24005;
14
15 When mounting module to PLC, all the lights are blinking after power ON PLC, please purchase new PLC.
16
17 Please fixed BD module on the PLC, poor contact may lead to failure.
18
19 BD module and top cover of PLC’s tightening torque is 0.3 ~~ 0.6 N.m.
20
21 **Warning**
22
23 Make sure to power off the PLC before mounting or removing the BD module and put the cover in right place.
24
25 = **2 Special feature** =
26
27 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.
28 1. 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.
29
30 (% class="table-bordered" %)
31 |(% colspan="2" %)**Extension port 1 (far away from PLC LED)**|(% colspan="2" %)**Extension port 2 (near PLC LED)**
32 |**Address**|**Description**|**Address**|**Description**
33 |M8112|(((
34 The flag of thermocouple switch in CH1
35
36 OFF: K type
37
38 ON: J type
39 )))|M8116|(((
40 The flag of thermocouple switch in CH1
41
42 OFF: K type
43
44 ON: J type
45 )))
46 |M8113|(((
47 The flag of thermocouple switch in CH2
48
49 OFF: K type
50
51 ON: J type
52 )))|M8117|(((
53 The flag of thermocouple switch in CH2
54
55 OFF: K type
56
57 ON: J type
58 )))
59 |D8112|CH1 temperature (unit: 0.1)|D8116|CH1 temperature (unit: 0.1)
60 |D8113|CH2 temperature (unit: 0.1)|D8117|CH2 temperature (unit: 0.1)
61
62 = **3 Dimension** =
63
64 (% class="table-bordered" %)
65 |(% colspan="2" %)**Applied sensor: 2-wire thermocouple(K/J)**
66 |L1+|Positive pole of CH1’s sensor
67 |L1-|Negative pole of CH1’s sensor
68 |FG|None
69 |L2+|Positive pole of CH2’s sensor
70 |L2-|Negative pole of CH2’s sensor
71
72 (% style="text-align:center" %)
73 [[image:LX3V-2TC-BD_html_f6959e46d9d24f81.jpg||height="332" width="300" class="img-thumbnail"]]
74
75 **LED lights indicating**
76
77 1. LED1: ON when power ON.
78 1. LED2: flashes when communications.
79 1. LED3 (TC 1): On indicates enable, OFF indicates disable, flicker indicates exceeding the measurement range.
80 1. LED4 (TC 2): On indicates enable, OFF indicates disable, flicker indicates exceeding the measurement range.
81
82 If the BD module is plugged into the old firmware version when on the host, all LEDs will be flashing.
83
84 = **4 Specifications** =
85
86 1. Please refer to the LX3V user manual for the general specification of LX3V-2TC-BD.
87 1. LX3V-2TC-BD is powered supply by LX3V main unit.
88
89 Table 4‑1
90
91 (% class="table-bordered" %)
92 |**Item**|(% colspan="4" %)**Explanation**
93 |Analog circuitry|(% colspan="4" %)DC 24V ±10%, 70mA
94 |Digital circuitry|(% colspan="4" %)DC 5V, 90mA (From the PLC internal power supply)
95 |Temperature|(% colspan="4" %)Read data by buffers
96 |Analog input signal|(% colspan="4" %)Thermocouple: K or J type (2 channels)
97 |Range of rated temperature|K|-100℃ - 1200℃|J|-100℃ - 600℃
98 |(% rowspan="2" %)Digital output|K|-1000 - 12000|J|-1000 - 6000
99 |(% colspan="4" %)12 bits total
100 |Accuracy|K|0.4℃|J|0.3℃
101 |Overall accuracy|(% colspan="4" %)±0.5%
102 |Conversion rate|(% colspan="4" %)700ms*2
103 |Conversion characteristics|(% colspan="4" %)(((
104 (% style="text-align:center" %)
105 [[image:LX3V-2TC-BD_html_62318c280689852.gif||class="img-thumbnail"]]
106 )))
107
108 **✎Note:** __**Ground-type thermocouple (3-wire) is not supported in this BD module.**__
109
110 = **5 Wire** =
111
112 **Warning**
113
114 Make sure cut off the electricity before installation/disassembly, to prevent electric shock or product damages.
115
116 **Caution**
117
118 1. Stay away from high-voltage cables to avoid interference or surge;
119 1. Grounding is required, but please do not share the ground site with high-voltage cable;
120 1. Do not weld any cable ends, and make ensure that the number of connecting cables, no more than a predetermined number;
121 1. Do not connect a substandard cable;
122 1. Fixed cable;
123
124 == **5.1 Suitable cable** ==
125
126 Use AWG25-16 to connect the output equipment
127
128 The maximal screwing torque is from 0.5 to 0.6N.m
129
130 Table 5‑1
131
132 (% class="table-bordered" %)
133 |**Line type**|**Cross sectional area(mm^^2^^)**|**End-of-pipe treatment**|(% rowspan="4" %)(((
134 (% style="text-align:center" %)
135 [[image:LX3V-2TC-BD_html_36c77dd4cfbf8f04.gif||class="img-thumbnail"]]
136 )))
137 |AWG26|0.1288|(% rowspan="3" %)(((
138 Stranded cable: stripped jacket, rub Conductor, then connect the cable.
139
140 Single-core cable: stripped jacket, Then connect the cable.
141 )))
142 |......|......
143 |AWG16|1.309
144
145 == **5.2 Input mode** ==
146
147 (% style="text-align:center" %)
148 [[image:LX3V-2TC-BD_html_9743d8406f8e2ccb.png||height="133" width="400" class="img-thumbnail"]]
149
150 = **6 Examples** =
151
152 The value of each channel is storage in the registers (D8112, D8113) in the form of digital. For output, in each "END" instruction, M8114 and M8115 convert the digital value into an analog output.
153
154 == **6.1 Basic Program Examples** ==
155
156 **Caution:**
157
158 1. M8112 and M8113 are used to analog to digital conversion for CH1 and CH2;
159 1. LX3V-2TC-BD only supports K type and J type thermocouple;
160 1. Don’t try to change the value in D8112 and D8113, or D8116 and D8117 when finished the A/D conversion;
161
162 Set CH1 and CH2 as thermocouple input mode, and stored value in D0 and D2.
163
164 (((
165 Set CH1 as K-type thermocouple input mode
166
167 Set CH2 as K-type thermocouple input mode
168
169 Write the digital value of CH1 into the register D0
170
171 Write the digital value of CH2 into the register D2
172
173 (% style="text-align:center" %)
174 [[image:LX3V-2TC-BD_html_8026e5acf87ff573.png||height="133" width="300" class="img-thumbnail"]]
175 )))
176
177 == **6.2 Examples of Applications** ==
178
179 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.
180
181 **Caution**
182
183 Since the use of additional programming orders, the converted precision and resolution of the analog value are different with the specifications.
184
185 The original range of the analog output does not change.
186
187 **Thermocouple input mode**
188
189 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.
190
191 Fahrenheit and Celsius conversion formula, Fahrenheit = Celsius * 9/5 + 32, the unit is 0.1 ℃.
192
193 (((
194 D10=D8112*9
195
196 D12=D10/5
197
198 D0=D12+320
199
200 D0=D8112*9/5+320
201
202 (% style="text-align:center" %)
203 [[image:LX3V-2TC-BD_html_a45c5d9e34d13000.png||height="146" width="400" class="img-thumbnail"]]
204 )))