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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
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 Built-in
EtherNet/IP Error (_EIP_ErrSta) bits are TRUE.
Major fault: Bit 7
Partial fault: Bit 6
Minor fault: Bit 5
7-84
MC
Node A data processing
MCR
MC
Node B data processing
MCR
MC
Node C data processing
MCR
NJ/NX-series CPU Unit Built-in EtherNet/IP Port User's Manual (W506)
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Troubleshooting
