2017-04
68
Absolute Rotary Encoder
Troubleshooting
10 Troubleshooting
10.1 What to Do in Case of a Fault
In case of a fault, check whether a encoder fault can be remedied according to the following
checklist.
Checklist
Problem Description Possible Solution
Power on –encoder doesn’t
respond
The bus is active but the
installed encoder transmitted
no boot up message.
■
The encoders have the
default baud rate 125
kBaud. Adapt your PLC
setting accordingly.
■
Reprogram the encoders
baud rate
■
Restart encoder so the
new baud rate setting will
be valid.
Malfunction of the position
value during transmission
During the transmission of the
position value occasional
malfunction occurs. The CAN
bus can be temporary in the
bus off state also.
Check, if the last bus node
has switched on the
terminator.
Too mu c h E R RO R - Fr am e s The bus load is too high in
case of too much error frames.
Check if all bus node has the
same baud rate. If one node
has another baud rate error
frames are produced
automatically.
Limit switches without function The encoder didn’t transmit
the bits for the limit switches.
The limit switch functionality
has to be activated once.
Please follow the description
you can find at capter "Usage
of Layer Setting Services
(LSS)".
Note!
Baud rate and node number changes
The changing of baud rate and node number are only valid after a new power-up, NMT Reset or
the store parameters command.