Handbuch / Manual
LED
Description
Red / Activity
The LED indicates any write/read accesses by the
host PC to the card. Every access is prolonged and
thus made visible by means of a digital monostable
multivibrator (time constant approx. 1 msec).
Green / Coax
The LED is activated if the ARCNET controller is
configured for a bit rate of 2.5 Mbit/s - 10 Mbit/s
valid for the coax interface. If there is no hub
function on the card, the controller is to be
operated in the non-backplane mode in addition. If
the LED is off, the coax interface is not addressed.
Yellow / Receive
The LED indicates any activity on the ARCNET
receiving channel. The signal is prolonged and thus
made visible by means of a digital monostable
multivibrator. As both the Coax and the RS485
interface receive the sent signal, too, the LED is
also activated by the transmitting signal. If the
ARCNET runs in a stable state, the LED is
continuously active. If reconfigurations [1] appear,
the LED flickers periodically.
Yellow / Transmit
The LED indicates activity on the ARCNET
transmitting channel. The signal is prolonged and
thus made visible by means of a digital monostable
multivibrator. The brightness of the LED depends
on the bit-rate set, the length of the transmitted
packages as well as on the number of nodes in the
ARCNET.
26
