Hardware-Installation
CAN-CBX-AI420
Manual • Doc.-No.: C.3030.21 / Rev. 1.4
Page 15 of 103
Note:
Red and green LEDs are strictly switched in phase opposition according to the CANopen
Specification [3].
For certain indicator states viewing all LEDs together might lead to a misinterpretation
of the indicator states of adjacent LEDs. It is therefore recommended to look at the
indicator state of an LED individually, in covering the adjacent LEDs.
3.2.2 Operation of the CAN-Error LED
LED indication
Display function
Label
Name
Colour
Indicator
state
Description
E
CAN Error
red
off
no error
1 flash
CAN controller is in Error Active state
on
CAN controller state is Bus Off
(or coding switch position ID-node > 7F
h
when
switching on; see ’Special Indicator States’on page 16)
2 flashes
Heartbeat or Nodeguard error occurred.
The LED automatically turns off, if
Nodeguard/Heartbeat-messages are received again.
Table 6: Indicator states of the red CAN Error-LED
3.2.3 Operation of the CANopen-Status LED
LED indication
Display function
Label
Name
Colour
Indicator
state
Description
S
CANopen
Status
green
blinking
Pre-operational
on
Operational
1 flash
Stopped
3 flashes
Module is in bootloader mode, the power LED is off,
(or coding switch position ID-node > 7F
h
when
switching on; see page 16)
Table 7: Indicator states of the CANopen Status-LED
