Omron CJ Series Operation Manual page 240

7 Troubleshooting
Event code Event name
84600000 hex Communica-
tions Error
84610000 hex Repeater
Unit Commu-
nications
Error
64980000 hex Representa-
tive Warning
64990000 hex Representa-
tive Alarm
7-12
Meaning Assumed cause
A Slave Unit was • Cable lengths (trunk line and
disconnected from branch lines) are unsuitable.
the network.
• A cable is disconnected or
loose.
• A terminating resistance is not
connected. Or, the terminating
resistance is somewhere other
than the end of the trunk line.
• Noise
• The Slave Unit does not
respond to communications
from the Master Unit because
the Slave Unit is faulty, the line
is disconnected, or the commu-
nications power supply is inter-
rupted.
An error occurred in • Cable lengths (trunk line and
Repeater Unit com- branch lines) are unsuitable.
munications.
• A cable is disconnected or
loose.
• A terminating resistance is not
connected. Or, the terminating
resistance is somewhere other
than the end of the trunk line.
• Noise
• The Repeater Unit does not
respond to communications
from the Master Unit because
the Repeater Unit is faulty, the
line is disconnected, or the
communications power is inter-
rupted.
A warning has • A warning has occurred in at
occurred in at least least one Slave Unit.
one Slave Unit.
An alarm has • An alarm has occurred in at
occurred in at least least one Slave Unit.
one Slave Unit.
CJ-series CompoNet Master Unit Operation Manual for NJ-series CPU Unit (Cat. No. W493)
Level
Maj Prt Min Obs Info
S U page 7-16
S U page 7-17
S page 7-18
S page 7-18
Reference