Coolmay PLC Modbus Communication Protocol Manual
●Modbus Communication protocol has been widely used in various flelds'as standard industrial communication protocol. Coolmay PLC RS485 communication interface supports this kind communication protocol so that PLC can communicate with device with MODBUS communication protocol conveniently, such as converter, temperature module, humidity module, configuration network, and various sensors etc.
●The Modbus communication protocol is divided into two series communication modes. ASCII and RTU. When configuring each PLC. User choose communication mode and RS485 serial port communication parameters (Baud rate, parity check etc), all devices on the Modbus bus should have same communication mode and series communication parameters. Using Modbus communication.the relevant special components or each PLC must be set in the ladder diagram.
●Coolmay PLC is with default programming port(RS232/RS422), besides, two communication port (RS232/PS485)is optional installed to meet users' external connection to three types equipment.
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User's Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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2018/6/12 |
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V7.31 |
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148 KB |
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