IMcInit()

IMcInit()

IMcInit() sets the communication port, station number and baud rate.

void IMcInit(HardwareSerial& serialPort, uint8_t stationNo, long baudrate)

Commands

Command	Arguments	Return Value	Operation
`IMcInit(serialPort, stationNo, baudrate)`	`HardwareSerial& serialPort` — Communication Serial port `uint8_t stationNo` — Station number `long baudrate` — Baud rate	`void`	Sets the communication port, station number and baud rate.

Example

This example uses the MPINO-16A8R8T RS-485 port Serial2, input D22, and transistor output D39.

void setup() {
  IMcMem(32, 32, 64, 64);  // Set the X·Y·M·D memory sizes used by MC Protocol.
  IMcAdr(0, 0, 0, 0);  // Set the start addresses of X·Y·M·D memory.
  IMcInit(Serial2, 1, 9600);  // Set the communication port, station number and baud rate.
}
 
void loop() {
  IMcProtocol();  // Check incoming requests and process MC Protocol responses.
  if (X != nullptr) X[0] = digitalRead(22) == HIGH;
  if (Y != nullptr) digitalWrite(39, Y[0] ? HIGH : LOW);
}

Precautions

Keep calling IMcProtocol() in loop().
Do not confuse hexadecimal addressing for X/Y with decimal addressing for M/D.
Do not use X/Y/M/D before allocating the pointers.
If Cnet or Modbus reallocates shared M/D memory at runtime, the addresses used by MC Protocol change. Complete all memory size settings in setup() and do not call them again at runtime.
Allocation functions do not return success status. For nonzero sizes, verify the corresponding global pointer is not nullptr before accessing it.

Built-in Commands in the Same Category

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Table of Contents

IMcInit()

Commands

Example

Precautions

Built-in Commands in the Same Category