Hardware manual PCD1.M2220-C15 │ Document 27-640 – Version ENG03 │ 2020-03-25
Saia-Burgess Controls AG
System resources
CPU/processor unit
3-10
3
3.6.4 Data retention
The used FRAM technology prevents data being lost if there is a power failure.
A supercap is also available on this controller type just for the retention of the
RTC (hardware clock). The supercap supplies the clock for at least 10 days and
typically 20 days.
The following resources are saved in the FRAM:
● Register
● Flags
● Timer
● Counter
● Strings (TEXT)
● Data blocks (DB)
The E-Line CPUs are maintenance-free and therefore do not require a battery.
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