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Installing the PW-6000 Two-Reader Module
LED Operation
LED Operation
The Two-Reader Module uses two onboard LEDs (D1 and D2) to provide status information during
the power-up sequence as well as during normal operation. The Two-Reader Module also uses two
onboard LEDs (D3 and D4) to indicate reader activity.
In addition to the status LEDs, there are six additional relay status LEDs and eight input status LEDs
on board. The input LEDs flash when there is a fault associated with the input. When any relay or input
is energized or ON, its corresponding status LED becomes ON also. The LED remains ON for as long
as the relay is energized.
Table 3: Onboard LEDs
Mode LED D1 LED D2 Description
Power-up
sequence
ON OFF Start power-up, hardware setup
OFF ON Testing RAM
ON ON Testing ROM and completing
initialization
FLASH ON LED D1 flashes four times after
power-up is completed
Normal
Operation
FLASH
This is the processor heartbeat LED. It
flashes once every second. A short ON
time (~20% duty cycle) indicates the
board is offline or has lost serial
communication with the Controller
board. A long ON time (~80% duty
cycle) indicates the board is online and
communicating with the Controller
board.
FLASH Flash when there is activity on its Serial
Port.
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