7 Tag Data Link Functions
7-82
NJ/NX-series CPU Unit Built-in EtherNet/IP Port User’s Manual (W506)
• You can use MC - MCR instructions and JMP instructions to process data only when the data links
are operating normally as shown below.
Precautions for Correct UsePrecautions 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
Node B data link
normal operation flag
Node C data link
normal operation flag
Node A data link
normal operation flag
MC
MC
Node A data processing
Node C data processing
Node B data processing
MC
MCR
MCR
MCR
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