Festo Контроллер позиционирования CPX-CMAX - Manual (Page 335)

A. Notes on commissioning and service
A−27
Festo P.BE−CPX−CMA X−CONTROL−EN en 0908NH
A.3.6 Switch−on behaviour and power−down
After switching on, not only initialisation is checked but also
whether the data backup of the FMAM was performed without
errors last time the system was switched off.
In the event of an error, E76 (power−down error) is issued.
If the operating voltage drops below 17.9 V, all retentive data
(device and axis parameters, identification and adaptation
data) are saved retentively.
ć If the supply voltage returns to the valid range within
10 ms, this mains drop has no external effect.
ć If the voltage drops lasts longer than 10 ms (do not switch
off), fault E52 is issued.