[Modbus]
Description
Send a packet command to the Slave node to read the Input Registers register.
Syntax
node1.readInputRegisters(read_address, read_size)
Parameters
node1: ModbusMasterNode Object.read_address: The starting address of the Input Registers register to be read.read_size: The size of the Input Registers register to be read.
Returns
Int: If it succeeds, send back MODBUS_SUCCESS and vice versa, send back EXCEPTION_CODE.
Example
#include <Modbus86.h>
ModbusMaster bus1;
ModbusMasterNode node1;
uint8_t result;
uint32_t receiveData;
void setup()
{
while(!Serial);
Serial1.begin(115200);
bus1.begin(MODBUS_RTU, Serial1);
node1.attach(16, bus1);
result = node1.readInputRegisters(5, 2);
if (result != MODBUS_SUCCESS) {
Serial.print("readInputRegisters => ErrorCode: ");
Serial.println(result);
} else {
Serial.print("From Input Register receiveData: ");
receiveData = node1.getResponseBuffer(0)
| (node1.getResponseBuffer(1) << 16);
Serial.println(receiveData);
}
}
void loop() {}See Also
Libraries Reference Home
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.
