Omron CS1D DUPLEX SYSTEM - 10-2009 Operation Manual page 456

Troubleshooting Errors in Duplex Connecting Cables
Left slot
RDY
CABLE ERR L
END RACK
Error is below
RDY
these Racks.
CABLE ERR R
CABLE ERR L
END RACK
RDY
CABLE ERR R
CABLE ERR L
END RACK
RDY
CABLE ERR R
Error is above CABLE ERR L
END RACK
these Racks.
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
420
■
Error Indications When an Expansion Unit is Removed
In this example, the Expansion Unit in Rack 1, slot 0 is removed, so the
affected slot 0 flags in A270 (A27002, A27004, and A27006) are turned ON.
The Duplex Communications Cable Status Flags are turned OFF for the all of
the Racks (A27100 to A27102).
The CS1D I/O Control Unit and CS1D I/O Interface Unit LED indicators all
indicate errors in the side where the error occurred. The CABLE ERR L Indi-
cator is lit red in the Units above the error and the CABLE ERR R Indicator is
lit red in the Units below the error.
A270 (Duplex Communications
Cable Error Flags)
= 0015
Right slot
RDY
CABLE ERR L
END RACK
RDY
CABLE ERR R
CABLE ERR L
END RACK
RDY
CABLE ERR R
CABLE ERR L
END RACK
RDY
CABLE ERR R
CABLE ERR L
END RACK
A271 (Duplex Communications Cable Status Flags)
0
= 0000
Indicates that the Connecting Cables are not duplexed between any of the Racks.
■
Troubleshooting Connecting Cable and Expansion Unit Problems
Once the error location has been identified, use the remedy described in the
following table to correct the error.
Cause
Disconnected Connecting Cable
Bad cable connection
There are errors in slot 0 of all Racks.
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
0 0 0 0 0 0 0 0 0 0 0 1 0 1 0
CPU Rack
(Rack 0)
Expansion
Rack
(Rack 1)
Expansion
Rack
(Rack 2)
Expansion
Rack (Rack 3)
Connect the cable that is disconnected.
Disconnect the cable and then connect it again.
If an error occurs when the cable is recon-
nected, replace the cable.
Note If the cable to the other slot is discon-
nected, the PLC will stop.
Section 10-4
1
Location of error
Errors are displayed in
all Racks after the
error location.
Remedy