User's Manual

22 • RF Sensor System I&O Manual 026-1702 Rev 0 10-30-00
ing system, if this light does not come on at all
for one minute, there may be a problem with
either the RF Receiver or the Token Ring Net-
work.
7.1.3. RF Gateway
The RF Gateway has four LEDs: a General
Status LED, an ALARM LED, an RS485 I/O
NET STATUS LED, and a TOKEN RING STA-
TUS LED (Figure 7-2).
7.1.3.1. The General Status LED
The General Status LED light flashes
GREEN once every second to indicate it is pow-
ered up.
7.1.3.2. The Alarm LED
The Alarm LED (red) indicates when an
alarm condition exists for the RF Gateway.
There are five possible LED states, each of
which indicates a different condition.
• OFF - No alarm conditions are active, and the RF
Gateway is functioning normally.
• Flashes 4 times/second - There is a problem with
the physical hardware (ROM) of the RF Gateway
board. The board may need to be replaced.
• Flashes 2 times/second - There is no user configu-
ration on this RF Gateway - no sensors are commis-
sioned in its memory, and it is essentially in an
empty state. This LED state will occur when the
board is first powered up on-site.
• Flashes 1 time/second - The RF Gateway is not
communicating with the area controller due to a pos-
sible RS485 I/O Network or controller failure.
• ON with no flashing - The RF Gateway is not de-
tecting any traffic on the Token Ring Network.
Check Token Ring Network connections.
7.1.3.3. RS485 I/O Network Status LED
The RS485 I/O Network Status LED flashes
ORANGE to indicate traffic on the I/O Network.
If this light does not come on at all and the
ALARM LED is flashing once per second, there
is a problem with the RS485 I/O Network or the
area controller.
7.1.3.4. Token Ring Network Status
LED
The Token Ring Network Status LED will
flash ORANGE briefly every time a message is
passed across the Token Ring Network. How-
ever, when the RF Gateway receives a message
that it detects as a message from one of its com-
missioned sensors, the LED will flash brightly
for 1/2 second.
If the RF Gateway has commissioned sen-
sors and is communicating properly, you should
see this LED flash brightly several times within
the course of a few minutes.
7.2. Clean Switch Operation
The clean switch input on the RF Sensors
allows you to manually suspend all temperature
alarming on the case so that the case may be
cleaned or serviced.
Activating Clean mode for an RF Sensor or
product simulator is slightly different depending
on whether the clean switch contacts are internal
(i.e. activated by pressing the Clean button on
the enclosure) or external.
Figure 7-2 - RF Gateway LED Locations