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7 Tag Data Link Functions

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

7-3 Ladder Programming for Tag Data Links

7-3-1 Ladder Programming for Tag Data Links

 Programming Example to Detect Errors

The following programming can be used to check for tag data link errors for each target node. This

programming is used to detect errors only after the data links for all nodes have started normally.

 Data Processing Programming Example

• The following type of programming can be used to process data only when the data links are oper-

ating normally.

Online

(*_ETNOnlineSta)

Normal Target

Node Table (#2)

*_EstbTargetSta[2]

Node 2

error output

Normal Target

Node Table (#2)

*_EstbTargetSta[2]

Normal Target Node Table (#1)

*_EstbTargetSta[1]

Node 1

error output

Normal Target

Node Table (#1)

*_EstbTargetSta[1]

Node 1 error output

Node 2 error output

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.

Omron CJ1W-EIP21 User Manual

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