Precautions for Correct Use
Communications Status with Target Node
The communications status with the target node of an NJ/NX-series Controller is shown by the
combination of the values of four system-defined variables.
•
_EIP_RegTargetSta (Registered Target Node Information)
• _EIP_EstbTargetSta (Normal Target Node Information)
• _EIP_TargetPLCErr (Target PLC Error Information)
• _EIP_TargetNodeErr (Target Node Error Information)
Value of
_EIP_RegT
arget-
Sta
Value of
_EIP_EstbTar-
getSta
Value of
_EIP_Tar-
getPLCErr
Value of
_EIP_Target-
NodeErr
Communications status
with target node
TRUE TRUE FALSE FALSE A connection with the target
node was established normal-
ly and there is no error in the
target PLC.
TRUE TRUE A connection with the target
node was established but
there is an error in the target
PLC.
FALSE --- TRUE A connection with the target
node was not established nor-
mally
.
FALSE --- --- --- The information is not valid
because the target node is not
registered.
For the NX-series Controller, the communications status of CIP communications 1 and CIP
communications 2 is shown by the combination of the values of four system-defined variables in
the same way as shown in the above table.
•
CIP Communications 1
• _EIP1_RegTargetSta (CIP Communications1 Registered Target Node Information)
• _EIP1_EstbTargetSta (CIP Communications1 Normal Target Node Information)
• _EIP1_TargetPLCErr (CIP Communications1 Target PLC Error Information)
• _EIP1_TargetNodeErr (CIP Communications1 Target Node Error Information)
• CIP Communications 2
• _EIP2_RegTargetSta (CIP Communications2 Registered Target Node Information)
• _EIP2_EstbTargetSta (CIP Communications2 Normal Target Node Information)
• _EIP2_TargetPLCErr (CIP Communications2 Target PLC Error Information)
• _EIP2_TargetNodeErr (CIP Communications2 Target Node Error Information)
3 System-defined Variables Related to the Built-in EtherNet/IP Port
3-33
NJ/NX-series CPU Unit Built-in EtherNet/IP Port User’s Manual (W506)
3-2 System-defined Variables
3
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