Omron SYSMAC CS1W-CLK13 Operation Manual page 161

Checking Data Link Status
Processing Data Only
when Operation Is Normal
Using the IL-ILC and JMP-
JME Instructions
Writing 0000 in the Data
Link Area when Errors
Occur
138
Additional part
Data Link Normal Operation Flags can be created using the programming
described in Using Data Link Communications Processing to Detect Normal
Operation or Errors in Other Nodes on page 136.
Perform processing only when operation is normal by creating a program
based on program blocks that process data for each node with the IL-ILC and
JMP-JME programs.
Node A Data Link
Normal Operation Flag
Node B Data Link
Normal Operation Flag
Node C Data Link
Normal Operation Flag
Data Link Normal Operation Flags can be created using the programming
described in Using Data Link Communications Processing to Detect Normal
Operation or Errors in Other Nodes on page 136.
When data links are not operating normally, write 0000 to the data link area of
the node with the error to stop other data being received.
The following example shows how to write 0000 in the data link area of node 2
(D00100 to D00120) using the BSET(071) (block set) instruction when an
error occurs at node 2.
Data Link Example: Communications Error at Node 2
Node 1
#1
×
#2
#62
The parts of the ladder program
that use the data link area for the
Data Link Normal
relevant node are processed only
Operation Flag
when the corresponding Normal
Operation Flag is ON.
Data Link Normal
Operation Flag
IL
ILC
IL
ILC
IL
ILC
Node 2
#1
#2
#62
Section 5-4
Node A data processing
Node B data processing
Node C data processing
Node 62
#1
#2
#62