Omron OMNUC G Series User Manual

8-13
8-3 Troubleshooting
Troubleshooting
8
83
Communications error
Data received during each
MECHATROLINK-II communications
cycle repeatedly failed, exceeding the
number of times set by the Communi-
cations Control (Pn005).
Check that commands are being sent
from the master node to the slave
node.
Check the MECHATROLINK-II
communications cable for disconnec-
tion or wiring problem.
Check the connection of the terminator
(termination resistor).
Check the MECHATROLINK-II
communications cable for excessive
noise, and that the cable is laid proper-
ly. Also check the FG wiring for the Ser-
vo Drive.
Increase the consecutive communica-
tions error detection count in the Com-
munications Control (Pn005).
84
Transmission cycle
error
While actuating MECHATROLINK-II
communications, synchronization
frames (SYNC) were
not received according to the transmis-
sion cycle.
 The synchronization frames
themselves were faulty.
 The transmission cycle of the
synchronization frames was not as
specified. (Includes dropped frames).
 Check the transmission cycle of the
synchronization frames sent from the
master node, and ensure that it does
not fluctuate and is as specified.
 Check the communications cable for
disconnection or wiring problem.
 Check for excessive noise on the
communications cable.
 Check the connection of the
terminator (termination resistor).
 Check the laying of the
communications cable and the FG
wiring.
86 Watchdog data error
Synchronization data exchanged
between the master and slave nodes
during each MECHATROLINK-II com-
munications cycle resulted in an error.
 Check the update process for the
watchdog data (MN) on the master
node.
87
Emergency stop input
error
 The emergency stop input became
OPEN.
 Check the power supply and wiring
connected to the emergency stop
input. Check that the emergency stop
input is ON.
 Check that the response of the
control signal power supply (12 to 24
VDC) at power-ON is not too slow in
comparison to the startup of the
Servo Drive.
90
Transmission cycle
setting error
 The transmission cycle setting for
receiving the MECHATROLINK-II
CONNECT command is incorrect.
 Check the transmission cycle
settings, and resend the CONNECT
command.
91 SYNC command error
 A SYNC-related command was
issued while MECHATROLINK-II was
in asynchronous communications
mode.
 Check the command sent from the
master node.
93
Parameter setting
error
 The electronic gear ratio parameter is
set outside the allowable setting
range. (Less than 1/100 or greater
than 100/1)
 Check the parameter setting.
94 Encoder error 2
The Servomotor is faulty. Replace the Servomotor.
Alarm
code
Alarm Name Cause Countermeasure

Omron OMNUC G Series Specifications

General

Brand	Omron
Model	OMNUC G Series
Category	Servo Drives
Language	English