Errors During Normal Operation - Omron SYSMAC CS1W-LCB01 Operation Manual

Errors and Alarm Troubleshooting
7-1-3

Errors during Normal Operation

LED Indicators LED
on front of Indicator on
Loop front of CPU
Controller Unit
RDY EXEC ERR/ALM
(See note.)
Lit Lit Not lit
Lit Not lit Not lit
Lit Lit Flashing
(Partial func-
tion block
database
(RAM) error
during sim-
plex opera-
tion, A42410
turns ON.)
Flashing
(Incompatible
Operation
Cycle Flag
(A42409)
turns ON.)
Lit Lit Flashing
(A42408, the
Loop Control-
ler High Load
Flag, is ON.)
Problem Cause
Normal Loop Controller operat-
condition ing normally.
Normal The Board is stopped for
condition either of the following
reasons.
Normal stop of oper-
ation
CPU Unit is waiting.
Partial A partial function block
function database (RAM) error
block data- was detected in self-
base diagnosis during opera-
(SRAM) tion in either duplex SPL
error during mode or simplex opera-
simplex tion.
operation
The Loop (CS1D-CPU@@P only)
Controller
The cycle time is too
is operat-
long (i.e., the CPU Unit's
ing with a
cycle time is more than
high load
30% of the minimum
rate (error
operation cycle of the
during
Loop Controller for three
duplex
consecutive cycles), so
operation
there is error in the oper-
only).
ation cycle of the Loop
Controller.
The Loop The LCB load rate
Controller exceeded 80% continu-
is operat- ously for 6 seconds.
ing with a
high load
rate.
Status Error
code
(Stored in
error log.)
--- None
--- None
None
For only a partial data- 0331
base error, operation
The details
stops only for the rele-
code con-
vant function blocks
tains either
(nonfatal error).
the rele-
vant block
address or
FFF if all
data bases
have an
error.
Operation continues None
with a large error in the
operation cycle (nonfa-
tal error).
Operation continues None
although the operation
cycle setting is
exceeded (non-fatal
error.)
Section 7-1
Corrective action
---
---
Refer to the CPU Unit's
Operation Manual and
clear the CPU Unit's
waiting status.
Execute the Download
or Clear all operation
from CX-Process Tool
Version 3.0 or later.
The RAM Error Flag
(A42410) will go OFF if
the data in RAM
becomes valid.
Set a longer minimum
Loop Controller opera-
tion cycle (5 times the
CPU Unit cycle time or
longer).
Adjust each function
block's operation cycle
so that the LCB load
rate is below 80%.
Another solution is to
add a Loop Control
Unit to the PLC and
shift some of the load
to that Unit.
227