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CIO Area Allocations Section 4-2
Communications
Status 1
(EtherNet/IP Unit to
CPU Unit) (n + 12)
Word n+12 contains status flags related to the tag data links, as shown in the
following diagram.
15 Error Log Stored ON Unit Indicates that an error record
is registered in the error log.
OFF Unit Indicates that no error records
are registered in the error log.
Also turned OFF when an
error log clear request is
received.
Bit Name Status Manipulated
by
Unit operation
Bit Name Status Manipulated
by
Unit operation
0 Verification Error ON Unit Indicates that the information
registered for a target node in
the tag data link parameters is
different from the actual node
information.
Main causes:
• The specified target does not
exist.
• The variable name does not
match.
• The connection size is differ-
ent.
• Connection resources are
insufficient.
OFF Unit Indicates that a verification
error has not occurred. Also
turned OFF when a verifica-
tion error is cleared.
1 (Not used) --- --- ---
2 Tag Data Link Error ON Unit Indicates that there were two
or more errors in a connection
as an originator.
This status does not indicate
the following errors.
• Connection as a target
• Connection timeout due to a
Link OFF Error with the
switching hub
OFF Unit Indicates that the errors listed
above did not occur.
3 (Not used) --- --- ---
n+12
Tag Data Link Error
Invalid Communications Paramete
r
All Tag Data Links Operating
Verification Error
Tag Refresh Error
Ta
g
Data Links Operatin
g
Tag Database Error
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0