Coolmay L02 Series - Modbus RTU Function RD3 A;WR3 A Instruction

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Coolmay L02 Series PLC Programming Manual

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RS2 command last parameter=1: Serial port 3;

=2: CAN.

8.5.2. Modbus RTU function RD3A/WR3A instruction

RD3A program example (refer to chapter 8.1.1 )

Master program

：

Main Page

Table of Contents2
Overview5
Coolmay L02 PLC Has the Following Advantages5
Coolmay L02 System Architecture8
Host Operation9
L02 Series Host and Modules Description11
L02 Series Host and Module Power Reference Table12
Precautions for L02 Series Host Programming13
Device Number15
Device Number Table15
Points15
Points 0.1～3,276.7S15
Points 0.001~32.767S15
Special Relay and Register17
Special Relay Number and Content17
Special Register Number and Content21
Function Instructions24
List of Basic Logic Instructions24
Points24
Applied Instructions【Sequence Is According to Instruct Variety】2125
Application of Analog32
Analog Input32
L02M24 Host Analog Input Type32
L02M24 Host Analog Input Read32
Expansion Analog Module Input Type33
Expansion Analog Module Input Read33
Host Analog Input Sampling35
Analog Input Program Example35
Analog Output37
L02M24 Host Analog Output Setting37
Expand Analog Module Output Setting37
Host Analog Output Program Example38
PID Instruction38
Outline38
PID Instruction Format and Parameter Description38
Function and Action Description39
Points39
Notice41
Example41
Application of High Speed Counter43
Assignment Table of Built-In High Speed Counter43
Related Device44
Application of High Speed Pulse45
High Speed Pulse Output45
Circular Interpolation46
Normal Interpolation Function46
Continuous Interpolation Function48
Pulse Width Modulation PWM51
Handwheel Pulse Function54
Coolmay L02 Series PLC Communication Manual57
MODBUS Instruction Explanation and Communication Address57
Function and Operation Description of Read/Write Data Command57
ADPRW Instruction Function and Operation Description58
Word Device Communication Address Number60
Bit Device Communication Address Number60
ADPRW Instruction Function Parameters61
Serial Port 1: RS232 (PLC Programming Port)61
Serial Port 2: RS485 (a B)/RS23261
Mitsubishi Programming Port63
Mitsubishi BD Protocol64
Freeport Protocol Functions and Examples65
Modbus RTU Protocol66
Modbus RTU Function ADPRW Instruction69
Modbus ASCII Protocol71
Serial Port 3: RS485 (A1 B1)72
Mitsubishi Programming Port Protocol75
Freeport Protocol Function75
Modbus RTU Function RD3A/WR3A Instruction76
Modbus RTU Function ADPRW Instruction79
Modbus ASCII Function80
Demo Program80
CAN Communication Port81
Freeport Protocol Function84
Modbus RTU Function RD3A/WR3A Instruction85
Modbus RTU Function ADPRW Instruction87
Network Communication88
MITSUBISHI MC Protocol91
Modbus TCP Function96
Etherenet/Ip Function98
Network N:N Communication108
Related Device Content108
Program Settings and Instructions110
Coolmay L02 Series PLC Hardware Identification and Address Allocation112
Hardware Identification of Digital Input and Output Modules112
Address Allocation of Digital Input and Output Modules113
Hardware Identification of Analog Input and Output Modules114
Address Reading of Analog Input and Output Modules115
Appendix Version Change Record116

Coolmay L02 Series - Modbus RTU Function RD3 A;WR3 A Instruction

Table of Contents