====== ImodbusRTUmasterRun() ======

''ImodbusRTUmasterRun()'' executes a registered request or the specified single request.

{{:en-us_commands:reference:imodbusrtumasterrun.svg?900|ImodbusRTUmasterRun command operation flow}}

''uint8_t ImodbusRTUmasterRun()''\\
''uint8_t ImodbusRTUmasterRun(HardwareSerial& serialPort, uint8_t slaveId, uint8_t functionCode, uint16_t address, uint16_t quantity, uint16_t* data, uint16_t timeoutMs = 100)''

===== Commands =====

^ Command ^ Arguments ^ Return Value ^ Operation ^
| ''ImodbusRTUmasterRun()'' | None | ''uint8_t'' | Executes a registered request or the specified single request. |


===== Example =====

<code cpp>
void setup() {
  ImodbusRTUmasterInit(Serial2, 9600);  // Set the Master's communication port and baud rate.
  ImodbusRTUmasterAdd(Serial2, 1, 0x03, 0x00, 1, &D[1]);  // Register a Master request for repeated execution.
  ImodbusRTUmasterAdd(Serial2, 1, 0x03, 0x01, 1, &D[2]);  // Register a Master request for repeated execution.
}

void loop() {
  ImodbusRTUmasterRun();  // Execute registered requests or the specified single request.
}
</code>

===== Precautions =====

  * Keep calling the Slave or Master execution function in ''loop()''.
  * The data array size must be at least the requested quantity.
  * Do not treat return codes BUSY and IDLE as communication failures.
  * When sharing ''M'' and ''D'' with Cnet/MC Protocol, define a single final size and initialization order. Do not call ''ImodbusRTUMem()'' or ''ICnetMem()'' again at runtime.
  * Memory allocation functions do not return success status. For nonzero sizes, verify that ''M'' and ''D'' are not ''nullptr'' before accessing them in user code.

===== Built-in Commands in the Same Category =====

  * [[:en-us_commands:reference:imodbusrtumasterinit|ImodbusRTUmasterInit() View detailed description]]
  * [[:en-us_commands:reference:imodbusrtumaster|ImodbusRTUmaster() View detailed description]]
  * [[:en-us_commands:reference:imodbusrtumasteradd|ImodbusRTUmasterAdd() View detailed description]]

[[:en-us_commands:builtin|← Built-in Command List]]