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
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#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()
{
}
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#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()
{
}
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See Also
setTransmitBuffer()
beginTransmission()
send()
getResponseBuffer()
86Duino 參考資料的文本遵循 知識共享署名-相同方式共享 3.0 許可證。參考資料中的程式碼範例已發佈到公共領域。
