BECKHOFF ET1100 - Manual (Page 13)

General Issues
Slave Controller – Application Note FAQ 9
Table 1: Error counters interpretation comments
Case Comment Localization
1 Master issue Master
2 Master/slave to slave with increasing EPU error cnt., or
between the two slaves
in front of slave with increasing Forw. error cnt.
3
4 no communication to the slave,
error counters cannot be read Last slave with stable communication to slave without
communication
5 RX_ER during IDLE from 1
st
slave back to master
6 RX_ER during frame from 1
st
slave back to master
7 RX_ER during IDLE Slave to slave with RX err. cnt. increasing
8 RX_ER during IDLE, link down
by Enhanced Link Detection Slave to slave with RX err. cnt. increasing, or last slave
with stable communication to slave without
communication
9 RX_ER during frame Slave to slave with RX err. cnt. increasing
10 RX_ER during frame, link down
by Enhanced Link Detection Slave to slave with RX err. cnt. increasing, or last slave
with stable communication to slave without
communication
11 Slave to slave with Lost link cnt. increasing
12 Slave to slave with CRC err. cnt. increasing, or between
the two slaves in front of slave with increasing Forw. error
cnt.
13 Slave to slave with increasing or Forw. error cnt., or
between the two slaves in front of slave with increasing
Forw. error cnt.
14 Any slave to slave at or before the slave with increasing
Forw. error cnt.
15 Any slave to slave at or before the slave with increasing
Forw. error cnt.
16 Slave to slave with increasing or CRC error cnt
17 Subsequent fault, typically not
source of errors Between the two slaves in front of slave with increasing
Forw. error cnt.