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The CANopen STATUS LED table below gives the possible LED indicator
states and the corresponding CAN state and controller. The only normal
states are “PRE-OPERATIONAL” and “OPERATIONAL.” Any red in the CAN
LED indicates a problem. All states listed below are consistent with CiA DR-
303-3 “Indicator Specification”, although not all possible states listed in that
document can occur in the ACR90x0. In addition, the ”off” and “blinking red”
indications are unique to the ACR90x0, not included and not conflicting with
the states listed in CiA DR-303-3 “Indicator Specification.”
The CANopen status LED is located just below the CANopen connector on
the ACR90x0.
CANopen
STATUS LED
CiA DR 303-3
CAN state
Description
Possible
ACR90x0
state(s)
OFF
N/A
No CAN controller detected
0
Blinking Green
Pre-Operational
CANopen is in the pre-
operational state.
1,3,4,5
Solid Green
Operational
The network is now
exchanging data
2
One Red blink
inside blinking
Green
Warning limit
reached
At least one of the error
counters of the CAN controller
chip has reached or exceeded
the warning level (too many
error frames)
6
Two Red blinks
inside blinking
Green
Error control
event (Health
event)
A guard event or heartbeat
event has occurred.
7
Solid Red
Bus Off
The CAN controller is bus off
10
Blinking Red
N/A
ACR internal error or
transmission overrun
8,9
136 ACR9000 Series Hardware Installation Guide
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