Troubleshooting Reference; Transponder Communication With Se485 Bus - Bosch Security Escort SE2000 Series Training Manual

Security Escort
LED
Heartbeat
Bus 0 to 7
Verifying communications
To verify communications, press the test feature on any transmitter. The Test in Progress LED
comes on. If it did not come on, the receivers are not communicating with the transponder.
About a second after the Test in Progress LED comes on, the Transmit Data LED flashes
(indicating the transponder is sending the test message to the Central Console). Less than a
second later the Receive Data LED flashes (indicating the Central Console returned an
acknowledgement).
Toggling the transponder's tamper switch on/off causes the Transmit Data LED to flash
(indicating that the transponder is sending the tamper message to the Central Console). Less
than a second later the Receive Data LED flashes (indicating the Central Console returns an
acknowledgement).
7.3

Troubleshooting reference

7.3.1

Transponder communication with SE485 bus

Robert Bosch (SEA) Pte Ltd
Troubleshooting transponders, points, receivers, and alert units | en
Function
Flashes at a fixed rate to indicate the microprocessor is operating
normally. If this LED stops flashing, the transponder is not
operational. Turn it off for 5-sec. using the power switch. Then turn it
back on. If the LED does not flash, the transponder should have the
AC power and the back-up battery disconnected. Wait a few seconds
and then reconnect. If the LED does not flash at this time, the
transponder should be replaced.
Normally these LEDs are on if the corresponding Bus Enable jumper is
in place, and is off if the jumper is removed. If the bus is enabled, the
LED flashes off and comes back on every time a receiver or alert
module on that bus communicates with the transponder. A Bus LED
flashes at the rate of the heartbeat LED if there is any kind of bus
fault (data to ground, data to power, and bus power to ground) on
that bus. On the EA501, the communications failure LED flashes at
this rate since there is no Bus LED. A Bus LED flashes at half the rate
of the Heartbeat LED if there are no points reporting on that bus
(open connection). On the EA501 the communications failure LED
flashes at this rate. If a Bus LED is flashing for a bus that is not
enabled, it can be reset in the Central Console's Transponder Data
View dialog by selecting this transponder and clicking the [Clear EE]
button. There are two special displays on the Bus LEDs. All the Bus
LEDs go out, and for 2-sec. a single LED is on. Walking down the
display from bus 0 to bus 7 indicates that a battery test is in progress.
Usually after the tamper switch is released, the bus LEDs count
rapidly to indicate the EEPROM memory is being updated.
Training Manual
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2017.08 | V2.18.1.0 | DOC