readWriteMultipleRegisters()

描述

向 Slave 節點發送讀寫 Holding Registers 暫存器的封包指令。

語法


node1.readWriteMultipleRegisters(read_address, read_size, write_address, write_size)
node2.readWriteMultipleRegisters(read_address, read_size)
－ 參數所搭配的函式與使用方法不同，詳見範例以示說明。


參數

node1/node2： ModbusMasterNode 物件。

read_address：欲讀取的 Holding Registers 暫存器之起始位址。

read_size：欲讀取的 Holding Registers 暫存器之大小。

write_address：欲寫入的 Holding Registers 暫存器之起始位址。

write_size：欲寫入的 Holding Registers 暫存器之大小。

回傳

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

範例

#include <Arduino.h>
#include <Modbus86.h>

ModbusMaster bus1;
ModbusMasterNode node1;

uint8_t reg[2];
uint8_t result;
uint32_t receiveData;

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.readWriteMultipleRegisters(5, 2, 10, 2);

	if (result != MODBUS_SUCCESS) {
		Serial.print("readWriteMultipleRegisters => ErrorCode: ");
		Serial.println(result);
	} else {
		Serial.print("From Holding Register receiveData: ");
		receiveData = node1.getResponseBuffer(0)
					| (node1.getResponseBuffer(1) << 16);
		Serial.println(receiveData);
	}
}

void loop()
{
}

#include <Arduino.h>
#include <Modbus86.h>

ModbusMaster bus1;
ModbusMasterNode node2;

uint8_t reg[2];
uint8_t result;
uint32_t receiveData;

void setup()
{
	while(!Serial);
	bus1.begin(MODBUS_RTU,Serial1);
	node2.attach(16, bus1); 

	reg[0] = 0x1234;
	reg[1] = 0xabcd;
	node2.beginTransmission(10);
	node2.send(reg[0]);
	node2.send(reg[1]);
	result = node2.readWriteMultipleRegisters(5, 2);

	if (result != MODBUS_SUCCESS) {
		Serial.print("readWriteMultipleRegisters => ErrorCode: ");
		Serial.println(result);
	} else {
		Serial.print("From Holding Register receiveData: ");
		receiveData = node2.getResponseBuffer(0)
					| (node2.getResponseBuffer(1) << 16);
		Serial.println(receiveData);
	}
}

void loop()
{
}

See Also

－ setTransmitBuffer()
－ beginTransmission()
－ send()
－ getResponseBuffer()

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.