Communication Specifications; Parameter Setting - Mitsubishi melservo-j2 series Instruction Manual

8. COMMUNICATION FUNCTIONS

8.2 Communication Specifications

The MELSERVO-J2 series 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 (e.g. MR-J2-C servo amplifier) is called a slave station. When fetching data
successively, the master station repeatedly commands the slave station to send data.
Item
Baudrate 4800/9600/19200 asynchronous system
Start bit
Data bit
Transfer code
Parity bit : 1 bit (even)
Stop bit
Transfer protocol Character system, half-duplex communication system
Start

8.2.1 Parameter setting

When the RS-422/RS-232C communication function is used to operate the servo, choose the communica-
tion specifications with parameter No.16.
(1) Communication baudrate
Choose the communication speed. Match this value to the communication speed of the sending end
(master station).
Parameter No. 16
− − −
(2) Checksum
The checksum added to data can be deleted. When the checksum is not needed for the communication
specifications of the master station, delete the checksum with this parameter.
Parameter No. 16
− − −
Checksum
0: Yes (checksum added)
1: No (checksum not added)
Description
: 1 bit
: 8 bits
: 1 bit
(LSB)
3
0 1 2
Communication baudrate
0: 9600[bps]
1:19200[bps]
2: 4800[bps]
4 5 6
Data
1 frame (11 bits)
8 - 3
(MSB)
Next
Stop
7 Parity
start