ABB ACS355 series User Manual

Fault tracing 367
Embedded fieldbus faults
Embedded fieldbus faults can be traced by monitoring group 53 EFB PROTOCOL
parameters. See also fault/alarm SERIAL 1 ERR (0028).
 No master device
If there is no master device on line, parameter 5306 EFB OK MESSAGES and 5307
EFB CRC ERRORS values remain unchanged.
What to do:
• Check that the network master is connected and properly configured.
• Check the cable connection.
 Same device address
If two or more devices have the same address, parameter 5307 EFB CRC ERRORS
value increases with every read/write command.
What to do:
• Check the device addresses. No two devices on line may have the same address.
 Incorrect wiring
If the communication wires are swapped (terminal A on one device is connected to
terminal B on another device), parameter 5306 EFB OK MESSAGESS value remains
unchanged and parameter 5307 EFB CRC ERRORS increases.
What to do:
Check the RS-232/EIA-485 interface connection.

ABB ACS355 series Specifications

General

Brand	ABB
Model	ACS355 series
Category	Controller
Language	English