Filter
Top Products
Interpreting EX2 LEDs
BAS-APG001-EN 97
Status LED
The Status LED on the EX2 module operates differently from the status
LED on LonTalk devices.
Table 25 describes EX2 Status LED activity.
Communications LEDs
The LEDs labeled TX and RX indicate the communication status of the
EX2 module.
Table 26 describes the LED activity.
Table 25. Status LED
LED activity Explanation
LED is on continuously Power is on and the unit is operating normally.
LED blinks twice The EX2 has not received its configuration from
the Tracer MP580/581. Use the Rover service
tool to make sure that the Tracer MP580/581 is
correctly configured for use with the EX2 mod
-
ule. Check the I/O bus wiring.
LED blinks once The EX2 is not communicating on the I/O bus.
Check the communications LEDs described in
Table 26 for more information.
LED is off continuously Either the power is off or the controller has
malfunctioned.
Table 26. Communications LEDs
LED activity Explanation
Both LEDs blink regularly The EX2 is communicating with the Tracer
MP580/581 on the I/O bus. (If the LEDs blink nor-
mally but the EX2 is not working properly, make
sure that I/O bus addresses are not duplicated.)
Both LEDs are off
continuously
The EX2 is not communicating on the I/O bus.
Either the I/O bus wiring is faulty or the Tracer
MP580/581 has not been configured to use the
EX2 module. Use the Rover service tool to con
-
figure the Tracer MP580/581 for use with the
EX2 module.
RX LED blinks,
TX LED is off
The EX2 is receiving communications from the
Tracer MP581 (either for itself or another EX2)
but cannot send communications. Either the
module is not configured in the Tracer MP580/
581 or its I/O bus address is incorrect. Use the
Rover service tool to configure the Tracer
MP580/581 for use with the EX2 module. Make
sure the DIP switches are set for the correct I/O
bus address (
“Setting the I/O bus addresses” on
page 93).
RX LED is on continuously,
TX LED is off
Polarity is reversed on the I/O bus wiring. Swap
the wires at the plus (+) and minus (–) I/O bus
screw terminals on the EX2 module.