4-2 Function Mode Communication Function •Communication with external network control devices can be carried out from the communication connector of the 3G3MX Series Inverter, through the RS-485 complying ModBus-RTU protocol. „ Communication Specifications 4 Functions The Modbus communication allows the Inverter to communicate with an external controller via the RS485 interface. Refer to the connection method as follows: -Procedure- 1. Set the parameters of the Inverter in accordance with your communication environment. 2. Shut off the power. 3. Remove the attached Digital Operator, and remove the modular plug mounted in the communication connector. 4.
Insert the communication cable connected to the ModBus bus line. 5. Set the 485/OPE communications selector to "485". 4-64 Function name Description Note Transmission speed 4800/9600/19200 bps Select using the Digital Operator. Synchronous system Asynchronous system Transmission code Binary Transmission mode LSB first Compatible interface RS-485 Data bit length 8 bits (Modbus-RTU mode) ASCII mode not available Parity No parity/Even/Odd Select using the Digital Operator. Stop bit length 1 or 2 bits Select using the Digital Operator. Starting method One-way start using host command Wait time Silent interval + 0 to 1000 [ms] Set using the Digital Operator.
Connection 1:N (N = 32 max.) Use the Digital Operator to select a station No. Connector RJ-45 modular jack Error check Overrun/Framing/CRC-16/Horizontal parity