Omron SYSMAC CJ1W-EIP21 Operation Manual page 100

CIO Area Allocations
74
Bit Name
0 Unit Error Occurred
1 Network Error
Occurred
2 to 3 (Not used)
4 Unit Memory Error
5 Communications
Controller Error
6 IP Address Duplica-
tion Error
7 to 8 (Not used)
9 Link OFF Error
Status Manipulated
by
ON Unit Indicates that an error
occurred that is related to
EtherNet/IP Unit operation.
This flag is turned ON when
any bit in Unit Status 1 is
ON. (Bits 1 to 15 are logi-
cally ORed.)
OFF Unit Indicates that a Unit error
did not occur. This flag is
turned OFF when the error
is cleared.
ON Unit One or more network-
related errors occurred.
(The bits in Communica-
tions Status 1 and 3 are log-
ically ORed.)
OFF Unit Indicates that a network
error did not occur. This flag
is turned OFF when the
error is cleared.
--- --- ---
ON Unit Indicates that an error
occurred in accessing the
Unit's internal non-volatile
memory (device error).
OFF Unit Indicates that a non-volatile
memory error did not occur.
This flag is not cleared even
if it occurs one time. (Flag
remains ON.)
ON Unit Indicates that an error
occurred in the communica-
tions controller.
OFF Unit Indicates that a communica-
tions controller error did not
occur. This flag remains ON
until the power supply is
turned OFF and ON again.
ON Unit An ARP was sent with the
specified IP address, indi-
cating that an IP address
duplication was detected.
An address duplication is
detected if there is an ARP
response. This flag remains
ON until the power supply is
turned OFF and ON again.
(The Ethernet interface will
stop.)
OFF Unit There was no ARP
response.
--- --- ---
ON Unit There was an error estab-
lishing a link with the switch-
ing hub.
OFF Unit A link was established nor-
mally with the switching hub.
Section 4-2
Unit operation