BECKHOFF CX1100-000x - Manual (Page 59)

Error handling and diagnostics
Embedded PC 57
5 n Register access to complex
modules has failed Check the nth module
11 n Complex module working incorrectly Exchange the nth module
12 n More than 120 modules in the ring Connect fewer modules
13 n nth module unknown Firmware update required
off Module is exchanging data no error
Note
If an error occurs on both terminal busses (K-Bus and IP-Link-Bus) the error on K-Bus is
reported at first. The IP-Link-Bus error is reported as second. Both error codes are
introduced by their typical blink signal.