Precautions During Control - Mitsubishi Electric Q Series Programming Manual

4 AUXILIARY AND APPLIED FUNCTIONS

4.16.2 Precautions during control

During operation by driver communication function, the positioning control or JOG operation, etc.
by servo program is not interrupted even if a servo error occurs in the slave axis. Be sure to stop
the master axis by user program.
(1) Servo amplifier
(a) For the axes where driver communication is executed, be sure to use a
servo amplifier that supports driver communication.
(b) Driver communication function is only valid in MR-J3- B and MR-J4- B.
MR-J4W- B and MR-J3W- B cannot be used.
Nor can MR-J4W- B be used in MR-J3- B compatibility mode.
(c) Be sure to connect the master CPU and slave CPU in the same
SSCNET (/H) line.
(d) The master CPU and slave CPU combination is set in the servo parameters.
After writing the servo parameters, turn ON again or reset the Multiple CPU
system power supply so that the parameters become valid.
(e) The differences between SSCNET and SSCNET /H communication
method in driver communication function are shown below.
Communication with
Servo amplifiers cannot be operated until
servo amplifiers after
connection with all axes set by system
Multiple CPU system
setting is confirmed.
power supply ON.
Only the first axis of the SSCNET line
(servo amplifier connected directly to the
Connect/disconnect Motion CPU) can connect/disconnect.
with servo amplifier Servo amplifiers other than the first axis
can be disconnected but cannot be
connected.
CAUTION
Communication method
SSCNET
4 - 96
SSCNET /H
Servo amplifier cannot be operated until
connection with all axes set to driver
communication is confirmed.
Normal axes (axes not set to driver
communication) can also be connected
after the network is established.
Only the first axis of the SSCNET line
(servo amplifier connected directly to the
Motion CPU) can connect/disconnect.
Only normal axes (axes not set to driver
communication) other than the first axis
can be connected when they are
disconnected. However, when axes set
to driver communication are
disconnected, they cannot communicate
with servo amplifiers that were
connected after disconnecting. (The
servo amplifier's LED display remains
"AA")