ModbusMasterNode.writeMultipleRegisters()

[Modbus]

Description

Send a packet command to the Slave node to write to multiple Holding Registers.

Syntax

node1.writeMultipleRegister(write_address, write_size)
node2.writeMultipleRegister()
(See the example to illustrate the difference in function and usage with or without parameters.)

Parameters

  • node1/node2: ModbusMasterNode Object.
  • write_address: The starting address of the Holding Registers you want to write to.
  • write_size: The size of the Holding Registers to be written to.

Returns

Int: If it succeeds, send back MODBUS_SUCCESS and vice versa, send back EXCEPTION_CODE.

Example

#include <Arduino.h>
#include <Modbus86.h>
 
ModbusMaster bus1;
ModbusMasterNode node1;
 
uint8_t reg[2];
uint8_t result;
 
void setup()
{
    while(!Serial);
    Serial1.begin(115200);
    bus1.begin(MODBUS_RTU, Serial1);
    node1.attach(16, bus1); 
 
    reg[0] = 0x1234;
    reg[1] = 0xabcd;
    node1.setTransmitBuffer(0, reg[0], MODBUS_DATAMODE_UINT16);
    node1.setTransmitBuffer(1, reg[1], MODBUS_DATAMODE_UINT16);
    result = node1.writeMultipleRegisters(5, 2);   
 
    if (result != MODBUS_SUCCESS) {
        Serial.print("ErrorCode: ");
        Serial.println(result);
    }
}
 
void loop()
{
}
#include <Arduino.h>
#include <Modbus86.h>
 
ModbusMaster bus1;
ModbusMasterNode node2;
 
uint8_t reg[2];
uint8_t result;
 
void setup()
{
    while(!Serial);
    Serial1.begin(115200);
    bus1.begin(MODBUS_RTU, Serial1);
    node2.attach(16, bus1); 
 
    reg[0] = 0x1234;
    reg[1] = 0xabcd;
    node2.beginTransmission(5);
    node2.send(reg[0]);
    node2.send(reg[1]);
    result = node2.writeMultipleRegisters();
 
    if (result != MODBUS_SUCCESS) {
        Serial.print("ErrorCode: ");
        Serial.println(result);
    }
}
 
void loop()
{
}

See Also

Libraries Reference Home

The text of the 86Duino reference is a modification of the Arduino reference and is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.

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