Cleaning and Inspection
Active Unit
Standby Unit
RUN
ERC
RUN
Not lit
Not lit
Flashing Not lit
Not lit
Lit
Flashing Not lit
Troubleshooting for Errors during Operation
Active Unit
Standby Unit
RUN
ERC
RUN
Lit
Not lit
Flashing Not lit
Not lit
Not lit
Lit
Lit
Not lit
Flashing Lit
Lit
Not lit
Not lit
10-7 Cleaning and Inspection
10-7-1 Cleaning
Status area
(Auxiliary Area)
ERC
Duplex Communications
Setting Error Flags
(A435)
CPU Bus Unit Setting
Error Flag (A40207)
(CPU standby)
Status area
(Auxiliary Area)
ERC
(No error)
Not lit
Duplex Communica-
tions Switched Flags
(A436)
Duplex Communica-
tions Standby Unit Error
Flag (A437)
Not lit
Duplex Communica-
tions Standby Unit Error
Flag (A437)
In the CS1D System, online replacement can be performed for Controller Link
Units. For details, refer to page 294.
This section describes cleaning and inspection procedures that are to be per-
formed as daily maintenance.
Conduct the following periodic cleaning to keep the Controller Link Unit in
optimum condition.
• Wipe the Unit with a dry, soft cloth daily.
• For stains that cannot be removed with a dry cloth, dip the cloth in
medium strength alcohol (2%), wring the cloth tightly, and then wipe down
the Unit.
• If glue, vinyl, or tape is left on the Unit for long periods of time, it will stain.
Remove these items during cleaning.
Probable cause
The was an error in the
If the RUN indicator still
standby Controller Link
does not light when the
Unit.
Unit is mounted on
another PLC, replace it.
The was an error in the
If the ERC indicator lights
active Controller Link
when the Unit is mounted
Unit.
on another PLC, replace
it.
The node address
Set the node address of
setting for the active
the active Unit to the
Controller Link Unit is
same address as the
out of the allowable
standby Unit in the range
range.
1 to 62.
Probable cause
Both the active and
---
standby Units are oper-
ating normally.
There was an error in
Replace the active Con-
the active Controller Link
troller Link Unit.
Unit. (The standby Unit
switched to active mode
and continued communi-
cations.)
The was an error in the
Replace the standby
standby Controller Link
Controller Link Unit.
Unit. (The active Unit
continued communica-
tions.)
The was a watchdog
Replace the standby
timer error in the standby
Controller Link Unit.
Controller Link Unit.
(The active Unit contin-
ued communications.)
Section 10-7
Probable remedy
Probable remedy
287