writeInputRegister()

描述

寫入 Input Registers 暫存器。

語法


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

參數

node1/node2ModbusSlaveNode 物件。

address:欲寫入的 Input Registers 暫存器位址。

value:欲寫入的單一 Input Registers 暫存器數值。

size:欲寫入的複數 Input Registers 暫存器數量。

buffer:將 buffer 指向的陣列空間內的陣列資料複寫至 Input Registers 暫存器內。

回傳

int:如果成功回傳 MODBUS_SUCCESS,反之回傳 EXCEPTION_CODE

範例

#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.begin(11, bus);

    /* Set the callback function of Read Input Registers (0x04). */
    node.cbFunc[MODBUS_CB_READ_INPUT_REGISTERS]
							= read_input_registers;
}

void loop()
{
    node.poll();
}


函式庫參考主頁面

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.