LK3U PLC is Compatible with Mitsubishi PLC series industrial control boards, has stable quality, powerful functions, reliable quality, and more importantly, incorporates more innovative elements to help the Chinese equipment industry cost control and equipment intelligent upgrades And testing, the practice has proved that the leading control PLC is a stable and reliable high-quality product
- Input signal bit DC24V, NPN, minimum drive current 10mA
- MR model output mode is a relay, the maximum drive voltage is AC250V/DC30V, < 3A; the peak value is 5A. MT model output mode is transistor, DC24V NPN (active low), < 500mA
- Analog input type default 0-10V 24 bit accuracy, optional 0-20mA or NTC(NTC10k or NTC50k)
- The analog output type is 0-10V
- High-speed input x0-x1 60KHz
- MT series default 8 high-speed output, Y0-Y7 200KHz*6/100KHz*2
- Dimensions do not contain terminals
- CAN communication port is only used for internal networking between our company plc(optional)
- Weighing 5v four wire sensor 24 bit accuracy(optional)
- 1 channel rs232 supports the Mitsubishi programming port protocol, Default baud rate 19200.can download programs, and connect to various touch screen
- 2 channel rs485 supports standard modbus rtu protocol/rs non-protocol communication, Mitsubishi programming port protocol, Default baud rate 19200. can be used to download programs, and various touch screens, inverters
LK3U Standard Edition Features
Communication | 1 channel 232, 9-pin serial interface definition 2 (TXD sending) 3 (RXD receiving) 5 grounding, support Mitsubishi programming port communication protocol, can download programs to connect to various touch screens, etc.: communication distance, up to 10 meters 2 channels 485, interface definition A and B, support Mitsubishi programming port/Modbus RTU/RS protocol, can be connected to various touch screens, inverters, etc.; communication distance, up to 1000 meters |
Analog | AD input: default (0-10V) can be changed to (0-20ma) DA output: The output is compatible with voltage and current. When connected to G- V+, it is 0-10V output, and when connected to G- I+, it is 0-20ma output. |
High-speed pulse | Input: The default is 2 channels (X0 60khz x1 10khz) Output: LK3U-14/20/24 is 4-way (Y0-Y3 200khz): LK3U-32/48/64 is (Y0-Y5 200khz. Y6-Y7 100khz) |
LK3U Optional Features
High-speed input expansion | High-speed input can add 4 channels (x2 10khz X3 60khz X4-X5 10khz) |
Thermal resistance temperature ntc | AD can be customized as temperature input NTC10K (-40-150°C) or NTC 50K (-40-209°C) up to the number of corresponding AD channels |
Weighing function | Up to 2 weighing interfaces can be opened, E+ E- S+ S- four-wire interface: excitation voltage 5V; signal voltage range -20mV+20mV; data collection frequency 10HZ |
CAN communication | Mode 1: Connect multiple industrial control boards, expand I0 point or analog temperature, etc., without any delay in response speed, up to 320 channels, expand analog temperature input, do not occupy 485 and 232 communication ports Mode 2: Connect our dedicated expansion IO/analog module ***Only one of the modes can be selected |
LK3U PLC
Model | DI | DO | AI | AO | Pulse input | Pulse output | Communication port |
LK3U-14MR-4AD-2DA | 8 | 6 | 4 | 2 | 2 | / | 1 channel RS232, 2 channel RS485; Option 1 can module |
LK3U-14MT-4AD-2DA | 8 | 6 | 4 | 2 | 2 | 4 | 1 channel RS232, 2 channel RS485; Option 1 can module |
LK3U-20MR-4AD-2DA | 12 | 8 | 4 | 2 | 2 | / | 1 channel RS232, 2 channel RS485; Option 1 can module |
LK3U-20MT-4AD-2DA | 12 | 8 | 4 | 2 | 2 | 4 | 1 channel RS232, 2 channel RS485; Option 1 can module |
LK3U-32MR-10AD-2DA | 16 | 16 | 10 | 2 | 2 | / | 1 channel RS232, 2 channel RS485; Option 1 can module |
LK3U-32MT-10AD-2DA | 16 | 16 | 10 | 2 | 2 | 8 | 1 channel RS232, 2 channel RS485; Option 1 can module |
LK3U-48MR-10AD-2DA | 24 | 24 | 10 | 2 | 2 | / | 1 channel RS232, 2 channel RS485; Option 1 can module |
LK3U-48MT-10AD-2DA | 24 | 24 | 10 | 2 | 2 | 8 | 1 channel RS232, 2 channel RS485; Option 1 can module |
LE3U-64MR-10AD-2DA | 32 | 32 | 10 | 2 | 2 | / | 1 channel RS232, 2 channel RS485; Option 1 can module |
LE3U-64MT-10AD-2DA | 32 | 32 | 10 | 2 | 2 | 8 | 1 channel RS232, 2 channel RS485; Option 1 can module |
IO Expansion module
LK8EX8EYR | Dimensions 118*88*45 Installation hole distance 95*37 | 8 input 8 relay output | input X00-X117 output Y100-Y117 | Max 2 |
LK8EX8EYT | Dimensions 118*88*45 Installation hole distance 95*37 | 8 input 8 transistor output | input X00-X117 output Y100-Y117 | Max 2 |
LK-16EX | Dimensions 118*88*45 Installation hole distance 95*37 | 16 input | X120-X157 | Max 2 |
LK-16EYR | Dimensions 118*88*45 Installation hole distance 95*37 | 16 relay outputs | Y120-Y157 | Max 2 |
LK-16EYT | Dimensions 118*88*45 Installation hole distance 95*37 | 16 transistor outputs | Y120-Y157 | Max 2 |
The expansion module must activate the can function
Analog/Weighing/Temperature Expansion Module
E4DA | Dimensions 118*88*45 Installation hole distance 95*37 | 4 analog outputs, compatible 0-10V/0-20ma | D1000-D1015 | Max 2 |
E8AD | Dimensions 118*88*45 Installation hole distance 95*37 | 8 analog inputs, compatible 0-10V/0-20ma | D1016-D1023 | Max 2 |
E2WH | Dimensions 118*88*45 Installation hole distance 95*37 | 2-channel weighing,S+ S- E+ E- | D1048-D1055 each channel occupies 2 registers (fault address M1048-M1051) | Max 1 |
E4WH | Dimensions 118*88*45 Installation hole distance 95*37 | 4 channel weighing,S+ S- E+ E- | D1048-D1055 each channel occupies 2 registers (fault address M1048-M1051) | Max 1 |
E2TC | Dimensions 118*88*45 Installation hole distance 95*37 | 2-channel thermocouple, type K | D1036-D1047 (fault address M1036-M1047) | Max 2 |
E4TC | Dimensions 118*88*45 Installation hole distance 95*37 | 4-channel thermocouple, type K | D1036-D1047 (fault address M1036-M1047) | Max 2 |
E6TC | Dimensions 118*88*45 Installation hole distance 95*37 | 6-channel thermocouple, type K | D1036-D1047 (fault address M1036-M1047) | Max 2 |
E2PT | Dimensions 118*88*45 Installation hole distance 95*37 | 2-channel PT100 | D1024-D1035 (fault address M1024-M1035) | Max 2 |
E4PT | Dimensions 118*88*45 Installation hole distance 95*37 | 4-channel PT100 | D1024-D1035 (fault address M1024-M1035) | Max 2 |
E6PT | Dimensions 118*88*45 Installation hole distance 95*37 | 6-channel PT100 | D1024-D1035 (fault address M1024-M1035) | Max 2 |
Custom function
Thermal resistance temperature NTC
NTC 10K (-40~150 degrees) NTC 50K (-40~209 degrees)
Weighing function
Up to 2 weighing interfaces: E+ E- S+ S-, excitation voltage 5V, signal voltage -20mV~+20mV, data collection frequency 10Hz
CAN communication
Mode 1, the connection of multiple industrial control boards, extended IO or analog temperature, etc., response speed without any delay, maximum 320 channels, extended analog temperature input, without occupying 485 and 232 communication ports.
Mode 2: Connect dedicated IO extension and analog module
AD analog input description

Analog quantity range setting
AD range setting: D0 is the upper limit of the range, and D1 is the lower limit of the range (occupying 2 registers) D0 is not a fixed register, other registers can be used
Range setting formula:
Input signal 0-10V (0-20mA): D0=External upper range, D1=External lower range
Input signal 4-20mA: D0 = external upper range, D1 = external lower range-((external upper range-external lower range)/4)
Examples of range setting:
Pressure transmitter external range 0-5Kpa
Input signal 0-10V (0-20mA): D0=5000, D1=0
Input signal 4-20mA: D0=5000, D1=0-((5000-0)/4)=-1250
NTC temperature reading instructions

Need to buy (NTC-10K thermistor with B value 3950, NTC-50K thermistor with B value 3950)
Note: When the probe wire is too short, please do not connect other electronic wires. Only wires with low impedance and strong anti-interference ability can be used, otherwise, the temperature will be unstable.
NTC temperature reading without setting range
Divide the read data by 10, which is the actual temperature
When D10=500, it means that the current temperature of the first channel is 50 degrees
When D10=437, it means that the current temperature of the first channel is 43.7 degrees
When D11=800, it means that the current temperature of the second channel is 80 degrees
When D11=-200, it means that the current temperature of the second channel is -20 degrees
ntc10k is converted to ntc50k
Add M8000-M0V K4095 D8009 to the program
DA analog output description

Analog output command: WR3A
Range setting: the same as the analog input setting method, when the range is not set, 0-10V corresponds to 0-4095
Example: When D0 upper limit range is set to 1000 (the lower limit can be set to 0 by default)
- When D10=500, DA0 outputs 5V voltage
- When D10=800, DA0 outputs 8V voltage
- When D11=340, DA1 outputs 3.4V voltage
- When D11=550, DA1 outputs 5.5V voltage
Weighing function HX711
HX711 function description
M8112: Start HX711 function (ON to execute collection)
M8114:: HX711 read error, the error is turned ON, manual reset is required
D8114: Filtering times (0-32, default 12, 0-2 does not perform filtering)
D8112: HX711 data low bit
D8113: HX711 data high bit
Note: The relay or register used above D8112 D8113 D8114 keeps data after power failure

Note: Since M8112 will not reset the PLC after it is stopped if M8112 is turned ON, the data of HX711 will be read to D8112 D8113 regardless of whether the PLC is stopped or running.
D8116: The first channel weighing filter times | D8117: The second channel weighing filter times |
D8118: The third channel weighing filter times | D8119: The fourth channel weighing filter times |
D8120: Low bit of the first channel weighing data | D8121: High bit of the first channel weighing data |
D8122: Low bit of the second channel weighing data | D8123: High bit of the second channel weighing data |
D8124: Low bit of the third channel weighing data | D8125: The high bit of the third channel weighing data |
D8126: Low bit of the fourth channel weighing data | D8127: High bit of the fourth channel weighing data |
M8120: Start the weighing function of the first channel | M8121: The weighing error in the first channel cannot be automatically reset |
M8122: Start the weighing function of the second channel | M8123: The weighing error in the second channel cannot be automatically reset |
M8124: Start the third channel weighing function | M8125: The third channel weighing error, can not automatically reset |
M8126: Start the fourth channel weighing function | M8127: The fourth channel weighing error, can not automatically reset |
RS485-1/RS485-2 communication port parameter setting
RS485-1 protocol selection | Baud rate | Stop bit | Parity check | Data length | D8400/D8420value | D8401/D8421value | ||
Modbus-RTU slave protocol | 9600 | 1 bit | odd parity | 8 bit | K12419 | Decimal | K1 | Decimal |
H3083 | Hexadecimal | H1 | Hexadecimal |
RS485-2 protocol selection | Baud rate | Stop bit | Parity check | Data length | D8400/D8420value | D8401/D8421value | ||
RS2 free communication protocol | 9600 | 1 bit | No verification | 8 bit | K4225 | Decimal | K0 | Decimal |
H1081 | Hexadecimal | H0 | Hexadecimal |
0(bit=OFF) 1(bit=ON) | ||
bit0 | Data length | 7 bit*1 8bit |
bit1 bit2 | Parity | bit2 bit1 (0 0)No verification (0 1) ODD (1 1) EVEN |
bit3 | Stop bit | 1bit 2bit |
bit4 bit5 bit6 bit7 | rate | bit7 bit6 bit5 bit4 bit7 bit6 bit5 bit4 (0 0 1 1):300 (1 0 0 0):9600 (0 1 0 0):600 (1 0 0 1):19200 (0 1 0 1):1200 (1 0 1 0):38400 (0 1 1 0):2400 (1 0 1 1):57600 (0 1 1 1):4800 (1 1 0 1):115200 |
bit8~bit11 | Disable | set 0 |
bit12 bit13 bit14 | bit14 bit13 bit12 (0 0 0): Programming port protocol (0 0 1): RS no protocol communication (RS485-1 dedicated) (0 1 0): RS2 non-protocol communication (RS485-2 dedicated) (0 1 1): MODBUS-RTU protocol (D8401//D8421 set to master and slave station) | |
bit15 | Disable | set 0 |
- When the data bit is 7 bits, no parity cannot be selected, otherwise, a 6304 fault code will be reported.
- When the programming port protocol is selected, the data length is 7 bits, the stop bit is 1 bit, and the parity and even parity are fixed parameters that cannot be set, and the baud rate can be set.
- Select MODBUS-RTU protocol, RS free port protocol, RS2 free port protocol, data length, stop bit, parity, and baud rate, all can be set.
- If D8400 or D8420 does not open the MODBUS-RTU master station function, when the ADPRW instruction is used, the 6706 fault code will be reported.
- When the value of D8401/D8421 is HO, the MODBUS master station protocol is selected.
- When the value of D8401/D8421 is H10, the MODBUS slave station protocol is selected.
LK3U PLC Manual
LK3U PLC General parameters
LK3U PLC-Communication port pin definition
LK3U PLC Component range
LK3U PLC Supported instructions
LK3U PLC Special relay M function description
LK3U PLC Special register D function description
LK3U PLC High-speed counter instructions
LK3U PLC High-speed counter instructions
LK3U PLC Communication port
LK3U PLC High speed output
LK3U PLC Analog read and write instructions
LK3U PLC CAN function
LK3U PLC PID
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GX Developer install
GX Developer Version8 Operating Manual
Hello,
What are the retentive area’s of memory? Is retentive memory eeProm or battery backup?
Can you have 2 types of AI 4 x NTC 10K & 4 x 0-20mA?
Can you use GX Works 2 to program?
please check our manual,it use battery.
analog can choose NTC or 0-20mA.
Thanks for your reply,
Is there a manual I can download?
I have been trying to find out the Beta of the NTC. Is it 3435 or 3950?
I need 5 weighing point additional
Muy buenas estimad@s en la linea LK3U veo que tiene para celula de pesaje pero mi duda es: que tan exacta es, cual es la velocidad de refresqueo(HZ) y si tiene algun video o ejemplo real para mas informacion. gracias saludos
Weighing corresponding wiring +EXE, +SIG, -EXE, -SIG are positive excitation and positive signal respectively
Negative excitation, negative signal, voltage range -20mV ~ +20mV, refresh frequency 10zh 24-bit precision
Plz tell me can you arrang plc for me with 5 weighing connection point
hi, max is 2 channel
I want to purchase as holesalle markete price plc with 5 weighing connections point
pode ligar a celula direto no clp ?
hx711 ja tem no clp ou precisa compar e colocar?
Onde ligar a celula?
No clp ou em uma placa hx711?
Liguei no clp não funciona
PLC URGENT
I had sent you email . did you get it?
Hello, very good. I would like to know if the PLC LK3U with weighing channel can control a dynamic scale or is it only static?
it support 5V sensor.