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Normal operation flag
Normal operation flag
Additional parts
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.
• The following shows an example where data processing is performed only when data links are
operating normally with MC and MCR instructions, or with JMP instructions.
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
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 any of the following
bits of the
_EIP_ErrSta
(Built-in EtherNet/IP Error) variable is TRUE.
• Major fault: Bit 7
• Partial fault: Bit 6
• Minor fault: Bit 5
7-3-2
Status Flags Related to Tag Data Links
The status of the tag data links is reflected in the following system-defined variables.
7 Tag Data Link Functions
7-84
NJ/NX-series CPU Unit Built-in EtherNet/IP Port User’s Manual (W506)
Summary of Contents for Sysmac NX1P2-10 1 Series
Page 8: ...Manual Structure 6 NJ NX series CPU Unit Built in EtherNet IP Port User s Manual W506...
Page 34: ...Revision History 32 NJ NX series CPU Unit Built in EtherNet IP Port User s Manual W506...
Page 388: ...9 Socket Service 9 34 NJ NX series CPU Unit Built in EtherNet IP Port User s Manual W506...
Page 430: ...12 FTP Client 12 14 NJ NX series CPU Unit Built in EtherNet IP Port User s Manual W506...
Page 569: ...I Index I 1 NJ NX series CPU Unit Built in EtherNet IP Port User s Manual W506 I...
Page 576: ...Index I 8 NJ NX series CPU Unit Built in EtherNet IP Port User s Manual W506...
Page 577: ......