CS1D-CPU

Troubleshooting Errors in Duplex Connecting Cables Section 10-4
10-4 Troubleshooting Errors in Duplex Connecting Cables
10-4-1 Identifying and Correcting the Cause of the Error
Break is below
these Racks.
Break is above
these Racks.
When a duplexed Connecting Cable is disconnected or damaged, the location
of the error can be identified with Auxiliary Area flags (in A270 and A271), the
CS1D I/O Control Unit LED indicators, and the CS1D I/O Interface Unit LED
indicators.
Note The CPU Unit’s alarm output (alarm display) does not indicate the error.
■ Error Indications for a Disconnected/Damaged Connecting Cable
In this example, there is an error in the Connecting Cable between Rack 1,
slot 0 and Rack 2, so the corresponding flag in A270 (A27002) is turned ON.
The flag for the same slot in the following Rack (A27004) is also turned ON.
Since the error occurred in a Connecting Cable after Rack 1, the Duplex Communications
Cable Status Flags are OFF for the connections between Rack 1
and Rack 2 (A27101) and between Rack 2 and Rack 3 (A27102).
The CS1D I/O Control Unit and CS1D I/O Interface Unit LED indicators all
indicate errors in the side where the break occurred. The CABLE ERR L Indicator
is lit red in the Units above the break and the CABLE ERR R Indicator is
lit red in the Units below the break.
Left slot 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
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
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 1
Error between Rack 1, slot 0 and Rack 2
Error between Rack 2, slot 0 and Rack 3
A270 (Duplex Communications Cable
Error Flags)
= 0014 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 0
CPU Rack
(Rack 0)
Expansion
Rack
(Rack 1)
Expansion
Rack
(Rack 2)
Expansion Rack
(Rack 3)
Location of break
Errors are displayed
in all Racks after the
break.
A271 (Duplex Communications Cable Status Flags)
= 0001
Indicates that the Connecting Cables are not duplexed
between Rack 1 and Rack 2, and between Rack 2 and Rack 3.
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