writeSingleRegister()

Posted by On 02 / 01 / 2019 0 Comment

Description

Sends a packet command to the Slave node to write to a single Holding Register register.

Syntax

node1.writeSingleRegister(write_address, write_size)

Parameters

node1: ModbusMasterNode object.

write_address: The address of the Holding Register register to be written.

write_size: The size of the Holding Register register to be written.

Return

int: If successful, return MODBUS_SUCCESS, otherwise return EXCEPTION_CODE .

Example

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#include <Modbus86.h>

  

ModbusMaster bus1;

ModbusMasterNode node1;

 

uint8_t result;

uint16_t value = 0x12AB;

 

void setup()

{

    while(!Serial);

    Serial1.begin(115200);

    bus1.begin(MODBUS_RTU, Serial1);

    node1.attach(16, bus1);

 

    result = node1.writeSingleRegister(5, value);

     

    if (result != MODBUS_SUCCESS) {

        Serial.print("writeSingleRegister => ErrorCode: ");

        Serial.println(result);

    }

}

  

void loop()

{

}

See Also

－ writeMultipleRegisters()

Library Reference

The text in the 86Duino reference is modified from the Arduino reference and is licensed under the Creative Commons Attribution-ShareAlike 3.0 License   The code examples in Resources have been released into the public domain.