Omron SYSMAC CS1W-CLK13 Operation Manual page 296

Locating and Correcting Cable Disconnections
Ring Status Information
Stored in Each Node
Note The disconnected node information is valid only when bit 15 (the Network
Disconnection Flag) is ON. If bit 15 is OFF, the earlier disconnected node
information is retained.
Note
Each node maintains ring status information in one word, as shown in the fol-
lowing diagram.
Ring Status word: CIO 1500 + 25 x (Unit No.) + 23
Node address of disconnected node
(00 Hex: No disconnected nodes detected.)
Disconnected Interface Flag
0: SL1 (uplink) or normal status
1: SL2 (downlink)
Local Node Disconnection Flag
0: Normal
1: Disconnection detected
Node address of disconnected node
(00 Hex: No disconnected nodes detected.)
Disconnected Interface Flag
0: SL1 (uplink) or normal status
1: SL2 (uplink)
Network Disconnection Flag
0: Normal
1: Disconnection detected
The following tables show the ring status for each node in the preceding
example.
Ring Status of Nodes 3 and 4
Bit
15 Network Disconnection Flag
(0: Normal; 1: Disconnection detected)
14 Disconnected node
information #1
13 to 8
7 Local Node Disconnection Flag
(0: Normal; 1: Disconnection detected)
6 Disconnected node
information #2
5 to 0
The contents of disconnected node information #1 and #2 may be reversed
depending on network conditions.
Ring Status of Nodes 1, 2, 5, and 6
Bit
15 Network Disconnection Flag
(0: Normal; 1: Disconnection detected)
14 Disconnected node
information #1
13 to 8
7 Local Node Disconnection Flag
(0: Normal; 1: Disconnection detected)
Function
Disconnected Interface Flag
0: SL1/normal; 1: SL2
Node address of disconnected node
Disconnected Interface Flag
0: SL1/normal; 1: SL2
Node address of disconnected node
Function
Disconnected Interface Flag
0: SL1/normal; 1: SL2
Node address of disconnected node
Section 10-5
Disconnected node
information #2
(See note.)
Disconnected node
information #1
(See note.)
Value
1
1
03 Hex
1
0
04 Hex
Value
1
1
03 Hex
0
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