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13. COMMUNICATION FUNCTIONS
13. COMMUNICATION FUNCTIONS
The MR-J2-03A5 has the RS-422 and RS-232C serial communication functions. These functions can be
used to perform servo operation, parameter changing, monitor function, etc.
However, the RS-422 and RS-232C communication functions cannot be used together. Select between RS-
422 and RS-232C with parameter No.16. (Refer to Section 5.2.5.)
This function is also available for RS-485. Make the same connections, settings, etc. as in RS-422.
13.1 Configuration
13.1.1 RS-422 configuration
(1) Outline
Up to 32 axes of servo amplifiers from stations 0 to 31 can be operated on the same bus.
Axis 32 (Station 31)
MITSUBISHI
OPEN
CN1A CN1B
CNP1 CNP2
CNP3
MELSERVO
MITSUBISHI
OPEN
CN1A CN1B
CNP1 CNP2
CNP3
MELSERVO
MITSUBISHI
OPEN
CN1A CN1B
CNP1 CNP2
CNP3
MELSERVO
Controller such as
personal computer
RS-232C
/RS-422
converter
RS-422
Axis 1 (Station 0)
Unavailable as option
To be prepared by customer.
To CNP1
Servo amplifier
Axis 2 (Station 1)
To CNP1
Servo amplifier
To CNP1
Servo amplifier
(2) Cable connection diagram
Wire as shown below:
(Note 3)30m max.
(Note 1)
Axis 2 servo amplifier
CNP1 connector
(Note 1)
Axis 1 servo amplifier
CNP1 connector
RS-422
output unit
(Note2)
RDP
RDN
SDP
LG
SDN
7
8
5
6
2
4
SDP
SDN
RDP
RDN
TRE
P24G
7
8
5
6
2
4
7
8
5
6
2
4
SDP
SDN
RDP
RDN
TRE
SDP
SDN
RDP
RDN
TRE
(Note1)
Axis 32 (last axis)
servo amplifier
CNP1 connector
P24G P24G
Note 1. Molex's CNP1 connector
Connector: 5557-08R
2. In the last axis, connect TRE and RDN.
3. Overall distance is 30m max. in the environment where there is a little noise.