Manual – MOVI-PLC® advanced DHE41B/DHF41B/DHR41B Controller
59
6
Diagnostic procedure for system bus CAN 1/CAN 2
Error Diagnostics
6
Error Diagnostics
6.1
Diagnostic procedure for system bus CAN 1/CAN 2
Diagnostic problem:
Communication via system bus CAN 1 or CAN 2
does not work.
Initial status:
•
System bus CAN 1 or CAN 2 is connected correctly.
•
Communication via system bus CAN 1 or CAN 2 is programmed.
↓
Is the bus connector plugged in?
No
→
[A]
Yes
↓
Response of the LEDs CAN -1 sta-
tus or CAN -2 status?
Orange
→
[B]
Green
→
[C]
Lights up or flashes red
↓
System bus CAN 1 or CAN 2 is not operating
or communication of the system bus is faulty.
↓
[A]
↓
Check the set baud rate.
↓
Baud rate OK?
No
→
[D]
Yes
↓
Make sure that terminating resistors are connected properly.
[A]
Check the bus cabling.
[B]
System bus CAN 1 or CAN 2 is being initialized.
[C]
Bus communication is OK.
↓
Check the application program!
[D]
Correct the baud rate!