14. COMMUNICATION FUNCTIONS

14.2Communication specifications 14.2.1 Communication overview

This servo amplifier is designed to send a reply on receipt of an instruction. The device which gives this instruction (e.g. personal computer) is called a master station and the device which sends a reply in response to the instruction (servo amplifier) is called a slave station. When fetching data successively, the master station repeatedly commands the slave station to send data.

Item

 

 

 

 

Description

 

 

 

 

 

 

Baudrate

 

9600/19200/38400/57600 asynchronous system

 

 

 

 

 

 

Start bit

 

: 1 bit

 

 

 

 

 

 

 

 

Transfer code

 

Data bit

 

: 8 bits

 

 

 

 

 

 

 

 

 

Parity bit

 

: 1 bit (even)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Stop bit

 

: 1 bit

 

 

 

 

 

 

 

 

Transfer protocol

 

Character system, half-duplex communication system

 

 

 

 

 

(LSB)

 

 

 

 

 

 

(MSB)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Next

 

Start

0

1

2

3

4

5

6

7

Parity Stop start

 

 

 

 

 

 

Data

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1 frame (11bits)

 

 

 

 

 

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Mitsubishi Electronics MR-J2S- A Communication specifications 14.2.1 Communication overview, Description, Lsb Msb