Level 1 Level 2 Level 3 Level 4
Variable Name Variable Name Variable Name Variable Name
_ErrSta Controller Er-
ror Status
_PLC_ErrSta PLC Func-
tion Module
Error Status
The rest of levels are omit-
ted.
_EIP_ErrSta EtherNet/IP
Error
The rest of levels are omit-
ted.
_NXB_ErrSta NX Bus
Function
Module Error
Status
The rest of levels are omit-
ted.
_XBU_ErrSta X Bus Func-
tion Module
Error Status
_XBU_MstrE
rr
X Bus Func-
tion Module
Master Error
Status
The rest of levels are omit-
ted.
_XBU_Uni-
tErr
X Bus Func-
tion Module
Unit Error
Status
_XBU_Uni-
tErrTbl
X Bus Func-
tion Module
Unit Error
Status T
able
Device variables in levels lower than Level 4_XBU_UnitErrTbl
Level 5 Level 6 Level 7
Variable Name Variable Name Variable Name
ETN_Err-
Sta
Communi-
cations
Port Error
ETN_Port1
Status.Por-
tErr
Communi-
cations
Port1 Error
ETN_Port1Status.MacA-
drErr
Port1 MAC Address Error
ETN_Port1Status.LanH-
wErr
Port1 Communications Controller Error
ETN_Port1Status.EtnCf-
gErr
Port1 Basic Ethernet Setting Error
ETN_Port1Sta-
tus.IP
AdrCfgErr
Port1 IP Address Setting Error
ETN_Port1Status.IP
Adr-
DupErr
Port1 IP Address Duplication Error
ETN_Port1Status.Boot-
pErr
Port1 BOOTP Server Error
ETN_Port2
Status.Por-
tErr
Communi-
cations
Port2 Error
ETN_Port2Status.MacA-
drErr
Port2 MAC Address Error
ETN_Port2Status.LanH-
wErr
Port2 Communications Controller Error
ETN_Port2Status.EtnCf-
gErr
Port2 Basic Ethernet Setting Error
ETN_Port2Sta-
tus.IP
AdrCfgErr
Port2 IP Address Setting Error
ETN_Port2Status.IP
Adr-
DupErr
Port2 IP Address Duplication Error
ETN_Port2Status.Boot-
pErr
Port2 BOOTP Server Error
ETN_TcpAppCfgErr TCP Application Setting Error
ETN_IPRTblErr IP Router Table Setting Error
ETN_DNSCfgErr DNS Setting Error
6 Device Variables Related to the NX-series EtherNet/IP Unit
6-3
NX-series EtherNet/IP Unit User's Manual (W627)
6-1 What You Can Check with Device Variables
6
6-1-1 Checking for Errors in the NX-series EtherNet/IP Unit
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