FMD88-10 with FRAM-RTC256 switch 1

[Philippe Parmentier]

Good day all,

I've noticed a ladder execution time slower when the Switch-1 is ON (so the memory variables become non-volatiles)

For testing I'm incrementing X at every ladder scan and every seconds, I'm displaying the sum and resetting to 0

Switch-1 OFF : Volatil memory : 975 ladder loops/sec
Switch-1 ON  : Non-Volatil memory : 820 ladder loops/sec

Is it a normal behaviour?

[support]

With DIP switch #1 ON, every write to the A to Z and DM 1 to 1000 a copy will be written also to the FRAM, which takes more time to execute than without DIP switch #1 being turned ON.