GE IC697HSC700 High Speed Counter
Advanced User Parameters
Advanced User Parameters (AUP) are internal operating
parameters used by the Ethernet interface. For most
applications, the default AUP should not be changed.
Caution
The IEEE 802.3 standard strongly discourages
the manual configuration of duplex mode for a
port (as would be possible using Advanced
User Parameters). Before manually configuring
duplex mode for a port using AUP, be sure that
you know the characteristics of the link partner
and are aware of the consequences of your
selection. In the words of the IEEE standard:
“Connecting incompatible DTE/MAU
combinations such as full duplex mode DTE to
a half duplex mode MAU, or a full-duplex station
(DTE or MAU) to a repeater or other half duplex
network, can lead to severe network
performance degradation, increased collisions,
late collisions, CRC errors, and undetected data
corruption.”
Note: If both speed and duplex mode of an Ethernet
interface port are forced using AUP, that port will no
longer perform automatic cable detection. This
means that if the Ethernet interface port is
connected to an external switch or hub port, a
crossover cable must be used. If the Ethernet
interface port is connected to the uplink port on an
external switch or hub, or the Ethernet interface
port is directly connected to another Ethernet
device, a normal (straight-through) cable must be
used.

LEDs
The three CPU LEDs indicate the operating status of various
CPU functions. During powerup, the LEDs are turned on and
off in the initialization sequence. When the CPU has
successfully completed initialization, the OK LED stays on.
The RUN and EN LEDs are off or on, depending on the CPU
state at last power-down.
The two port LEDs indicate activity on COM 1 and COM 2.
The following table lists the CPU LED functions during
normal operation.
The Ethernet Interface indicators consist of seven LEDs. All
are single-color green LEDs controlled by the Ethernet
interface.
■ Module OK (EOK)
■ LAN online (LAN)
■ Status (STAT)
■ Two activity LEDS (LINK)
■ Two speed LEDS (100)
The EOK, LAN, and STAT LEDs are grouped together and
indicate the state and status of the Ethernet interface.
Each Ethernet port has two green LED indicators, 100 and
LINK. The Ethernet LED operation is described on page 7.