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8
Fault diagnosis
This chapter describes how to identify and rectify errors and malfunctions of the AHS/
AHM36 CANopen und AHS/AHM36 CANopen Inox Absolute Encoder.
8.1
In the event of faults or errors
CAUTION
Cease operation if the cause of the malfunction has not been clearly identified!
Stop the machine if you cannot clearly identify or allocate the error and if you cannot
safely rectify the malfunction.
8.2
Support
If you cannot remedy an error with the help of the information provided in this chapter,
please contact your local SICK subsidiary.
8.3
Error and status indications on the LED
LED
Figure 41: Position of the LED
8.3.1
Meaning of the LED displays
The LED indicates the CANopen status of the encoder and errors on the CANopen bus.
Table 141: Meaning of the LED displays
Display
Description
Status indications
ôKõ
Green
Status of the CANopen state machine = Stopped
ôFõ
Green
Status of the CANopen state machine = Preoperational
O
Green
Status of the CANopen state machine = Operational
Error messages
o
Off
No supply voltage
O
Red
Busoff
The CANopen master is disconnected from the bus.
ôFõ
Red
Invalid configuration
ôKõ
Red
Counter for the internal CAN controller has reached the warning
level for “error frames”.
ôKõôKõ
Red
Error within the Node Guarding telegram or the Heartbeat tele‐
gram
FAULT DIAGNOSIS
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8016869/1EF3/2021-12-08 | SICK
O P E R A T I N G I N S T R U C T I O N S | AHS/AHM36 CANopen
AHS/AHM36 CANopen Inox
89
Subject to change without notice