8 Message Communications
8-36
NJ-series CPU Unit Built-in EtherNet/IP Port User’s Manual (W506)
(1) Interface Flag Details
05 hex Media Counters Media counters for the built-in
EtherNet/IP port.
Read Struct Reads the current value.
Alignment Errors Number of frames received that
were not octets in length.
UDINT Reads the current value.
FCS Errors Number of frames received that
did not pass the FCS check.
UDINT Reads the current value.
Single Collisions Number of frames sent success-
fully with only one collision.
UDINT Reads the current value.
Multiple Collisions Number of frames sent success-
fully with two or more collisions.
UDINT Reads the current value.
SQE Test Errors Number of times a SQE test error
message was generated.
UDINT Reads the current value.
Deferred Transmissions The number of frames for which
the first attempt to send was
delayed because the media was
busy.
STRING Reads the current value.
Late Collisions The number of collisions detected
in packets that were sent after
512 bit times.
UDINT Reads the current value.
Excessive Collisions The number of frames that failed
to be sent because of excessive
collisions.
UDINT Reads the current value.
MAC Transmit Errors The number of frames that failed
to be sent due to an internal MAC
sublayer transmission error.
UDINT Reads the current value.
Carrier Sense Errors The number of times the carrier
sense condition was lost or the
number of times an assertion did
not occur when an attempt was
made to send the frame.
UDINT Reads the current value.
Frame Too Long The number of frames received
that exceeded the maximum
allowed frame size.
UDINT Reads the current value.
MAC Receive Errors The number of frames that could
not be received through the inter-
face due to an internal MAC sub-
layer reception error.
UDINT Reads the current value.
06 hex Interface Control Counter for the built-in Ether-
Net/IP port.
Write Struct ---
Control Bits
AutoNego for Ethernet communi-
cations that specifies full duplex.
WORD Refer to (2) Control Bit Details,
below.
Forced Interface Speed Gives the set value of the Ether-
net baud rate.
UINT Reads the set value.
Bit Name Description
0 LinkStatus FALSE: The link is down.
TRUE: The link is up.
1 Half/FullDuplex FALSE: Half duplex
TRUE: Full duplex
2 to 4 Negotiation Status 00 hex: Auto-negotiation is in progress.
01 hex: Auto-negotiation and speed detection failed.
02 hex: Auto-negotiation failed, but speed detection succeeded.
03 hex: Speed and duplex mode negotiation succeeded.
04 hex: Auto-negotiation was not attempted.
5 Manual Setting Requires Speed Always FALSE: Changes can be applied automatically.
6 Local Hardware Fault Always FALSE
7 to 31 Reserved Always FALSE
Attribute ID Parameter name Description Attribute
Read/write data
Data
type
Value
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