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5. Communication Specifications

5-1. MODBUS

･Communication system : Half duplex asynchronous system (Polling selecting system)

･Protocol : MODBUS protocol

･Communication speed : 38400,19200,9600,4800,2400bps switching

･Start bit : 1 bit

･Data length : 7 bits (ASCII mode)

8 bits (RTU mode/ASCII mode)

･Parity bit : None/even/odd

･Step bit : 1 bit/2 bits

･Transmission code : ASCII (ASCII mode)

Binary (RTU mode)

･Error check : LRC (ASCII mode)

(Error detection)

CRC-16 (RTU mode)

･Data transmission procedure : No procedure

･Usage signal name : Sending and receiving data only(Without using the control signal)

5-2. PRIVATE

･Communication system : Half duplex asynchronous system (Polling selecting system)

･Protocol : PRIVATE protocol

･Communication speed : 38400,19200,9600,4800,2400bps switching

･Start bit : 1 bit

･Data length : 7 bits

･Parity bit : Even

･Stop bit : 1 bit

･Transmission code : ASCII code

･Error check : BCC (Block check character) Check sum

(Error detection)

･Data transmission procedure : No procedure

･Usage signal name : Sending and receiving data only (Without using the control signal)

Chino KP3000 User Manual

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