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ModbusWriteRegister (Function) In french: ModbusEcritRegistre Writes one or more registers (16-bit values) to a Modbus slave, starting at a specific address. Remarks: - This function blocks the application until the slave acknowledges the message or until the session timeout is exceeded.
- The single-bit write operation corresponds to Modbus function code 06 (Write Single Holding Register).
- The multiple-bit write operation corresponds to Modbus function code 16 (Write Multiple Holding Registers).
New in version 2024
Session is modbusSession
Session = ModbusConnectTCP("192.168.1.7")
IF ErrorOccurred = True THEN
Trace(ErrorInfo())
ELSE
IF NOT ModbusWriteRegister(Session, 0x42, [0xF8C5, 1637, -1542, 0, 0x00A8]) THEN
Trace(ErrorInfo())
END
END
ModbusDisconnect(Session)
Syntax
Writing a 16-bit value to a Modbus slave Hide the details
<Result> = ModbusWriteRegister(<Session> , <Address> , <Value>)
<Result>: Boolean - True if written successfully,
- False otherwise. To get more details on the error, use ErrorInfo with the errMessage constant.
<Session>: modbusSession variable Name of the modbusSession variable that corresponds to the communication session with the Modbus slave. <Address>: Integer Value between 0 and 65,535 that corresponds to the address (slave) to which the value must be written. <Value>: Integer 16-bit number that must be written to the register in the slave.
Writing multiple 16-bit values to a Modbus slave Hide the details
<Result> = ModbusWriteRegister(<Session> , <Address> , <Values>)
<Result>: Boolean - True if written successfully,
- False otherwise. To get more details on the error, use ErrorInfo with the errMessage constant.
<Session>: modbusSession variable Name of the modbusSession variable that corresponds to the communication session with the Modbus slave. <Address>: Integer Value between 0 and 65,535 that corresponds to the address (slave) to which the values must be written. <Values>: Array Array of 16-bit integers that must be written to the registers in the slave. Remarks CAUTION: Since write operations make it possible to control PLCs, it is recommended to test the different commands before the production phase to make sure the PLCs perform the required operations. Business / UI classification: Neutral code
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