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Ladder Programming with Tag Data Links Section 6-3
Programming for Revision 1 or Higher
Example of Programming
to Process Data
The following type of programming can be used to process data only when the
data links are operating normally.
Interlocks (IL and ILC instructions) and jumps (JMP and JME instructions) can
also be used to process data only when the data links are operating normally
as shown below.
Tag Data Link
Operating
n+11 bit 01
Unit Error
Occurred
n+10 bit 00
Unit Error
Occurred
n+10 bit 00
10000
Local node
Error output
Release Flag
Local node
Error output
DIFD
10000
DIFU
10000
The parts of the ladder program
that use the data link area for
the relevant node are processed
only when the corresponding
Normal Operation Flag is ON.
Normal Operation
Flag
Additional part
Normal Operation
Flag
Node A data processing
Node A Data Link
Normal Operation Flag
IL
ILC
Node B data processing
Node B Data Link
Normal Operation Flag
IL
ILC
Node C data processing
Node C Data Link
Normal Operation Flag
IL
ILC