Beckhoff EPP3504-0023 Short Manual page 126

Commissioning on EtherCAT Master
Fig. 49: Illegally exceeding the E-Bus current
From TwinCAT 2.11 and above, a warning message "E-Bus Power of Terminal..." is output in the logger
window when such a configuration is activated:
Fig. 50: Warning message for exceeding E-Bus current
Caution! Malfunction possible!
The same ground potential must be used for the E-Bus supply of all EtherCAT terminals in a terminal block!
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NOTE
Version: 1.2 EPP3504-0023