Mitsubishi Electric MELSEC iQ-R16MTCPU Programming Manual page 278

• When using a multi-axis servo amplifier (MR-J4W-B), there is a restriction on the number of connectable units (servo
amplifier (MR-J4(W)-B), SSCNET/H head module, other drivers etc.) between the Motion CPU and the multi-axis servo
amplifier depending on the number of optical hub units being used. The number of connectable units depending on how
many optical hub units are used are shown below. When more than the number of connectable units are connected, a
warning (error code: 0C82H) occurs. While communication with MR-J4W-B is still possible when the warning occurs,
communication becomes unstable, therefore the unit configuration should be reviewed.
Multi-axis servo
amplifier
MR-J4-B
MR-J4W2-B 1 axis set
2 axes set
MR-J4W3-B 1 axis set
2 axes set
3 axes set
*1 Only the units on the same route are included in the count.
*2 A warning occurs.
Motion CPU module
5 FUNCTIONS USED WITH SSCNET COMMUNICATION
276
5.8 Compatible Devices with SSCNETIII(/H)
Number of optical hub units connected
0 1 2
No restriction
14 12 10
No restriction
14 12 10
13 11 9
Optical
hub unit
IN
OUT1
OUT2
MR-J4W- B is not connected on the same
route therefore there are no restrictions
*1
3 4 5
9 7 5
9 7 5
8 6 4
Two optical hub units are connected on the main route
therefore the number of connected units is ten or less.
Optical
hub unit
IN
OUT1
OUT2
6 7 8
4 2 1
4 2 1
*2

3 1
Servo amplifier
MR-J4W2- B
Main
route
Sub
route (2)
Sub
route (1)
9 or more
*2

*2
