10
model 2000 Ethernet Module Operation Manual
Chapter 2 Names of Parts and their Functions
2
The functions of these parts are shown below.
(1) Status indicator LEDs
These LEDs display operating status, etc. as shown in Table 2-1.
(2) Transmission status indicator LEDs
These LEDs are with the Ethernet connectors of EN651, EN651A, and EN661.
(3) Ethernet Connectors (EN-A, EN-B)
These are Ethernet communication ports. Connect AUI cables to them in case of the
EN611, EN621, EB621 (10BASE5) modules, or coaxial cables to them in case of the
EN631, EN641, EB641 (10BASE2) modules, or twisted pair cables to them in case of
the EN651, EN661 (100BASE-TX, 10BASE-T) modules, or twisted pair cables to
them in case of the EN651, EN651A, EN661 (100BASE-TX/10BASE-T) modules.
Table 2-1 Status Indicator LEDs and the Meanings of their Indications Name of LED
Name of
LED
Display
Normally
RUN
(green)
Hardware operation display
ON:
Running
Blink: Watchdog timer (Hardware error detecting function) disabled
OFF: Down
ON
HLTH
(green)
Module status display
ON:
Operation normal
Blink: Network parameter setting mode (Set using RUN mode setting
switch:See Chapter 3.)
OFF: Down
ON
L-A
(green)
Ethernet bus A status display
ON or blink:
Transmitting
OFF:
Transmission stopped
ON or blink
L-B
(green)
Ethernet bus B status display (EN621 and EN641 only)
ON or blink:
Transmitting
OFF:
Transmission stopped
ON or blink
Table 2-2 Transmission Status Indicator LEDs and the Meanings of their Indications Name of LED
Name of
LED
Display
Normally
L-A
(yellow)
Ethernet status display of bus A
ON or blink: Transmitting
OFF:
Transmission stopped
ON or blink
LINK-A
(green)
Ethernet status display of bus A
ON: Hardware
connected
normally
OFF: Hardware
connected
abnormally
ON
L-B
(yellow)
Ethernet status display of bus B (EN661)
ON or blink: Transmitting
OFF:
Transmission stop
ON or blink
LINK-B
(green)
Ethernet status display of bus B (EN661)
ON: Hardware
connected
normally
OFF: Hardware
connected
abnormally
ON
