[Modbus]
描述
Write to the Input Registers.
語法
node1.writeInputRegister(address, value)
node2.writeInputRegister(address, size, buffer)
參數
node1/node2: ModbusSlaveNode object.address: The address of the Input Registers to write to.value: The value of the single Input Registers that you want to write to.size: The number of plural Input Registers you want to write to.buffer: Copy the data of the array in the array space pointed to by the buffer to the Input Registers.
回傳
int: If it succeeds, send back MODBUS_SUCCESS, and vice versa send back 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.attach(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
86Duino 參考的文本是根據 知識共享署名-相同方式分享 3.0 許可證，部分文本是從 Arduino 參考 修改的。 參考中的代碼示例已發佈到公共領域。