I-2533 User Manual (ver. 1.1, 2013/05/31) ------10
2.5 LED Indicator
There are 5 LEDs on the I-2533. One for power indication, three for CAN
bus indication and one for fiber indication. The LED assignment and
description are shown as follows.
Figure 2-4 LED Assignment of I-2533
LED Name
Color
Description
PWR
Red
When power on the I-2533, this LED is turned on.
CAN_Tx
Green When the I-2533 sends one CAN message to CAN
bus, this LED flashes once. Therefore, if bus loading
is heavy, the LED will be always on.
CAN_Rx
Green When the I-2533 receives one CAN message from
CAN bus, this LED flashes once. Therefore, if bus
loading is heavy, the LED will be always on.
CAN Err
Red
1. If the I-2533 detects the bus-off status on the CAN
bus, this LED is always on. At this moment, the
I-2533 clear all CAN messages stored in the
I-2533 transmission buffer. When the I-2533 can
receive
or
transmit
one
CAN
message
successfully, the error status is clear and the LED
is turned off if there is no error happened.
2. If the I-2533 can
’t send CAN messages
successfully because the bus connector is off or
some errors happen, this LED flashes five times
per second. In this case, the I-2533 will keep all
CAN messages in the transmission buffer until the
buffer is overflow
。
When the I-2533 can receive or
transmit one CAN message successfully, the error
status is clear and the LED is turned off if there is
no error happened.
