BEI Sensors THK4 - Manual (Page 48)

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6. Diagnosis
6.2 Troubleshooting
6.2.1 Power on – Encoder doesn’t respond
Problem:
The bus is active but the installed encoder
transmitted no boot up message.
Possible solution:
- The encoders have the default baud rate
20kbaud. Adapt your PLC setting
accordingly.
- Reprogram the encoders baud rate
- Restart encoder so the new baud rate
setting will be valid.
6.2.2 Malfunction of the position value during
transmission
Problem:
During the transmission of the position value
occasional malfunction occurs. The CAN bus can
be temporary in the bus off state also.
Possible solution:
Check, if the last bus node has switched on the
terminal resistor.
6.2.3 Too much ERROR-Frames
Problem:
The bus load is too high in case of too much error
frames.
Possible solution:
Check if all bus node has the same baud rate. If
one node has another baud rate error frames are
produced automatically.
6.2.4 Limit switches without function
Problem:
The encoder didn’t transmit the bits for the limit
switches.
Possible solution:
The limit switch functionality has to be activated
once. Please follow the description you can find at
4.5.
6.2.5 Baudrate and Node Number changes
Notice: The changing of baud rate and node
number are only valid after a new power up, NMT
Reset or the store parameters command.