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Nomenclature and Functions Section 1-6
Indicator Color Status Meaning
RUN Green Not lit Operation stopped
Hardware error
Lit Normal operation
100M
(Transfer speed)
Green Not lit 10 Mbps (10Base-T)
Lit 100 Mbps (100Base-TX)
ERC
(Ethernet Unit error)
Red Not lit Unit normal
Lit Node address not between 1 and 254
A hardware (e.g., internal memory) error has occurred.
ERH
(CPU Unit error)
Red Not lit CPU Unit normal
Lit An error has occurred at the CPU Unit.
There is an error in the I/O table, unit number, unit setup, or routing
table settings.
Flashing An illegal IP address has been set. With automatic address gener-
ation, the rightmost two digits of the IP address do not match the
node address.
SD
(Send Data)
Yellow Not lit Not sending data (ready to send)
Lit Sending data
RD
(Receive Data)
Yellow Not lit Not receiving data (ready to receive)
Lit Receiving data
LNK
(Link status)
Yellow Not lit Link not established between hubs.
Lit Link established between hubs.
TCP
(TCP socket in use)
Yellow Not lit None of the eight TCP sockets provided for socket services is in
use.
Lit At least one of the eight TCP sockets provided for socket services
is in use.
FTP
(FTP Server Service)
Yellow Not lit FTP server on standby.
Lit FTP server operating (one user connected).
HOST
(Server connection sta-
tus)
Yellow Not lit Server (DNS, SMTP, POP3, or SNTP) not being used.
Flashing An error has occurred in the server connection.
Lit The server connection is normal.
