Pepperl+Fuchs CC-LINK Series, Компактное руководство

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CC-Link Gateways
Diagnostics
8.2.5.2 Earth fault monitor
The earth fault monitor checks the symmetry of the AS-i voltage. If the voltage is
no longer sufficiently symmetrical, the noise immunity of data transmission is
compromised.
8.2.5.3 Noise voltage detection
Noise voltages on the AS-i cable can cause telegram errors. The noise voltage
detector monitors the AS-i circuit for AC voltages which have been generated by
neither the AS-i Master nor the slaves.
8.2.5.4 Overvoltage detection
Normally UASi+ and UASi- are in symmetry with system ground. If this potential
rises significantly, the overvoltage detector reports this anomaly.