Omron SYSMAC CS1W-CLK13 Operation Manual page 155

Checking Data Link Status
Sufficient
Node 1
Send
area
No remaining
Node 1
Send
area
When 4-bit Format is Specified
First status word + 0 Node 4
First status word + 1
Node 8
First status word + 2
Node 12
First status word + 3
Node 16
First status word + 4
Node 20
First status word + 5 Node 24
First status word + 6
Node 30
First status word + 7
Node 32
Node 36
First status word + 8
Node 40
First status word + 9
Node 44
First status word + 10
Node 48
First status word + 11
Node 52
First status word + 12
Node 58
First status word + 13
Node 60
First status word + 14
0
First status word + 15
Note
132
4. Even if an offset error occurs, the data link will operate and the node will
participate in the data links. In the node where the offset error occurred,
however, all receive area words will be cleared to 0.
5. The following shows an example of an insufficient (short) receive area.
Node 2
Receive
area
Data indicated by
is received in
node 2.
6. The following shows an example of a remaining receive area.
Node 2
Receive
area
Data indicated by
is received in
node 2.
Node 3 Node 2 Node 1
Node 7 Node 6 Node 5
Node 11 Node 10 Node 9
Node 15 Node 14 Node 13
Node 19 Node 18 Node 17
Node 23 Node 22 Node 21
Node 27 Node 26 Node 25
Node 31 Node 30 Node 29
Node 35 Node 34 Node 33
Node 39 Node 38 Node 37
Node 43 Node 42 Node 41
Node 47 Node 46 Node 45
Node 51 Node 50 Node 49
Node 55 Node 54 Node 53
Node 59 Node 58 Node 57
0 Node 62 Node 61
1. A communications error will occur in a node that is not participating in the
network.
2. When a communications error occurs, previous status is retained for other
nodes status.
3. Only the PLC status and the PLC's CPU Unit error status are refreshed for
nodes that are participating in the network, but not participating in the data
links.
Insufficient (short)
Node 1
Send
area
Data indicated by
cannot be received in node 2.
Data indicated by
and the remaining data is truncated.
Remaining
Node 1
Send
area
Data indicated by
is received in node 2 and the
remaining words are cleared.
Communications error
(data link reception)
0: Normal
1: Error
Data link participation
0: Not in data link or data link inactive
1: In data link
Section 5-4
Node 2
Receive
area
is received
Node 2
Receive
area
PLC status
0: Inactive (user program
not running)
1: Active (user program
running)
PLC's CPU Unit error
0: Normal
1: Error