[etherlab-users] Slave lost forever after power cycling

Joachim Sällvin joachim.sallvin at corpowerocean.com
Fri Feb 14 10:34:27 CET 2020


Hi all,

I loose contact with my TU4-ECT (freq inverter from Nord Drive) slave after power-cycling it when there are other slaves on the bus. This happens intermittently. Only a EEPROM reset (I use TwinCAT for this ) can make it accessible again. When it is the only slave on the bus it seems as I can power-cycle and always access again.

Has anyone experienced the same problem? What might cause this? Workarounds?

Example:

Before power-cycling the TU4-ECT (all slaves have been given alias addresses):


$ sudo ethercat slaves

0  1:0  PREOP  +  EK1100 EtherCAT-Koppler (2A E-Bus)

1  2:0  PREOP  +  EL2004 4K. Dig. Ausgang 24V, 0.5A

2  3:0  PREOP  +  ifm IO-Link Master AL1332

3  4:0  INIT   E  TU4-ECT


After power-cycling the TU4-ECT:


$ sudo ethercat slaves

0  1:0  PREOP  +  EK1100 EtherCAT-Koppler (2A E-Bus)

1  2:0  PREOP  +  EL2004 4K. Dig. Ausgang 24V, 0.5A

2  3:0  PREOP  +  ifm IO-Link Master AL1332

3  8:0  PREOP  +  ifm IO-Link Master AL1332


Lost!!!


I'm using Linux kernel 4.13.13-rt5, Ubuntu 18.04 and EtherCAT master 1.5.2.




Joachim Sällvin








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