It is on the same side as output terminal Y, the mark with “A+” and “B-“is the port of RS485.
Answer: No. Haiwell PLC is using Flash ROM permanent storage, power failure willaffect the data storage.
Theoretically Flash ROM is erasable for 1000000 times, and theprogram will only be stored one time when downloading, so no need to worryabout the storing times..
