Omron SYSMAC C-series, System Manual

Page: 86 / 131

77
Self-Diagnosis
Section 7-1
Error Before Operation: C500 Masters and Slaves
Programming
Console LEDs
LEDs on Master LEDs on
Slave
Remote
Terminal LEDs
Cause Correction
TR/
ERR TEST
OK END
RS
CHK LINE
ERR TR/
ERR ERR POWER TR/
ERR
CPU WAITING flash not lit lit not lit lit not lit lit lit Terminator not set. Set farthest Unit
from Master as
terminator.
Transmission line
broken or wired
incorrectly. Correct
transmission line
Slave and Remote
Terminal points
exceed 512. Reduce total
number of points.
not lit not lit Power not
supplied to
terminator Slave. Supply power to
Slave.
lit not lit not lit not
lit Power not
supplied to
terminator Remote
Terminal. Supply power to
Remote Terminal.
flash not lit flash not lit lit not lit lit lit Multiple
terminators set.
Refer to 7-7 Slave
Unit Numbers with
Multiple Termina-
tors. Set only one
terminator for
each Master.
lit not lit not
lit lit lit not lit lit lit Transmission line
shorted. Correct
transmission line.
CPU WAITING
or
REMOTE I/O
ERR
flash
/lit not lit --- not lit lit not lit lit lit Same unit number
or word set twice
on Slaves. Correct settings
so same word is
not allocated
twice.
lit not lit --- not lit lit lit lit lit Slave I/O bus
error. Check Slave, I/O
Units on Slave,
and Slave’s Rack.
REMOTE I/O
ERR
or
VER ERR
not
lit not lit not
lit not lit lit not lit lit lit CPU Unit error in
Master. Replace Master.
I/O VER ERR not
lit not lit not
lit not lit lit not lit lit lit I/O table not
written or I/O table
inconsistency.
(LEDs will go out
after TR/ERR LED
on Master flashes
and terminator
LEDs are lit for
several seconds.) Check I/O table on
Programming
Console and
correct if
necessary. If I/O
table verifies,
check all Slaves
not set as
terminators.