Omron CJ1W-EIP21 Operation Manuals page 202

For nj-series cpu unit. cj-series ethernet/ip units

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7 Tag Data Link Functions

• You can use MC − MCR instructions and JMP instructions to process data only when the data

links are operating normally as shown below.

Node A data link

normal operation flag

Node B data link

normal operation flag

Node C data link

normal operation flag

Precautions for Correct Use

Even if an error occurs in communications with a target device, the input data from the target

device will remain stored in words allocated in memory to the local node. To prevent malfunc-

tions, write the user program so that no input processing is performed when the following Unit

Error Occurred (*_UnitErr) are TRUE.

Node A data processing

Node B data processing

Node C data processing

CJ-series EtherNet/IP Units Operation Manual for NJ-series CPU Unit (W495)

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