ModbusMasterNode.writeSingleRegister()

[Modbus]

Description

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

Returns

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

Example

#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()

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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.