Status Led; Communications Leds - Trane Tracer MP581 Hardware Installation

Chapter 13 Installing EX2 expansion modules
80

Status LED

The Status LED on the EX2 module operates differently from the status
LED on Comm5 devices. Table 13 describes EX2 Status LED activity.
Table 13. Status LED
LED activity
LED is on continuously
LED blinks twice
LED blinks once
LED is off continuously

Communications LEDs

The LEDs labeled TX and RX indicate the communication status of the
EX2 module. Table 14 describes the LED activity.
Table 14. Communications LEDs
LED activity
Both LEDs blink regularly
Both LEDs are off
continuously
RX LED blinks,
TX LED is off
RX LED is on continuously,
TX LED is off
Explanation
Power is on and the unit is operating normally.
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.
The EX2 is not communicating on the I/O bus.
Check the communications LEDs described in
Table 14 for more information.
Either the power is off or the controller has
malfunctioned.
Explanation
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.)
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.
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 75).
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.
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