[?]: PLC sizing - 30 DO, 15DI, 10 AI ?

[josealjim]

Hello guys,

I´m new in this forum and id really appreciate your help.
I have to do the stimation of a biogas plant automation system.
The control system doesnt seem to be so difficult, 30 DO, 15DI, 10 AI from some field sensors and 8 AI from the biogas generator control cabinet (Ethernet conection).
The analogic signal will be just monitored (using the necesary elements in the program to transform and storage them).
For the program Clock timer, about 28 timers, signals trnsducers, comparators... (not so difficult).
The point is that I dont know how to size the PLC memory COULD YOU PLEASE HELP ME WITH THAT?.
Monitoring and storing trends and historical data will have to be done.
The point is, Should I take into account the number of words stored every five secs in one month (as a example) for sizing the plc memory or the data is automaticatly stored in the server and deleted in the PLC memory?

Id really appreciate your suggestions coss i dont have too much idea about this.


Thank you a lot.

[josealjim]

The doubt about data logging has already become clrear, but could please anyone help me to make a rough stimation about my plc working and load memory?

Thank you in advance