writeInputRegister()

Posted by On 01 / 31 / 2019 0 Comment

Description

Write to Input Registers register.

Syntax

node1.writeInputRegister(address, value) node2.writeInputRegister(address, size, buffer)

Parameters

node1/node2: ModbusSlaveNode object.

address: Input Registers register address to be written.

value: Single Input Registers register value to be written.

size: The number of multiple Input Registers to be written.

buffer: Copy the array data in the array space pointed to by buffer to the Input Registers register.

Return

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

Example

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#include <Modbus86.h>

 

ModbusSlave bus;

ModbusSlaveNode node;

 

uint8_t read_input_registers(   uint8_t function,

                                 uint16_t address,

                                 uint16_t length)

{

    int sensorPin = A2;

 

    if (address <= 2 && address + length > 2)

        node.writeInputRegister(2, analogRead(sensorPin));

     

    return MODBUS_SUCCESS;

}

 

void setup()

{   

    Serial485.begin(115200);

     

    /* Modbus RTU Mode via RS485. */

    bus.begin(MODBUS_RTU, Serial485);

     

    /* Slave node with ID 11. */

    node.attach(11, bus);

 

    /* Set the callback function of Read Input Registers (0x04). */

    node.cbFunc[MODBUS_CB_READ_INPUT_REGISTERS]

              &n bsp;             = read_input_registers;

}

 

void loop()

{

    node.poll();

}

Library Reference

The text in the 86Duino reference material is modified from Arduino reference material, and according to Creative Commons Attribution-Share Alike 3.0 License  The code examples in the references have been released into the public domain.