Programming Example for Error Detection
The following program can be used to check for tag data link errors for each target node. This pro-
gramming is used to detect errors which may occur after the data links for all the nodes are started
normally
.
Online
(_EIP_EtnOnlineSta)
*1
Normal Target
Node Information (#2)
_EIP_EstbTargetSta[2]
*2
Node 2
error output
Normal Target
Node Information (#2)
_EIP_EstbTargetSta[2]
*2
Normal Target
Node Information (#1)
_EIP_EstbTargetSta[1]
*2
Node 1
error output
Normal Target
Node Information (#1)
_EIP_EstbTargetSta[1]
*2
Node 1 error output
Node 2 error output
*1. This is a system-defined variable for NJ-series CPU Units.
For NX701 and NX102 CPU Units, the variable varies depending on the built-in EtherNet/IP port, as
shown below
.
Built-in EtherNet/IP port 1: _EIP1_EtnOnlineSta
Built-in EtherNet/IP port 2: _EIP2_EtnOnlineSta
For NX1P2 CPU Units, the variable is as below.
Built-in EtherNet/IP port 1: _EIP1_EtnOnlineSta
*2. This is a system-defined variable for NJ-series CPU Units.
For NX701 and NX102 CPU Units, the variable varies depending on the built-in EtherNet/IP port, as
shown below.
Built-in EtherNet/IP port 1: _EIP1_EstbTargetSta
Built-in EtherNet/IP port 2: _EIP2_EstbTargetSta
For NX1P2 CPU Units, the variable is as below.
Built-in EtherNet/IP port 1: _EIP1_EstbTargetSta
Data Processing Programming Example
• The following shows an example where data processing is performed only when data links are
operating normally
.
7 Tag Data Link Functions
7-83
NJ/NX-series CPU Unit Built-in EtherNet/IP Port User’s Manual (W506)
7-3 Ladder Programming for Tag Data Links
7
7-3-1 Ladder Programming for Tag Data Links
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