DATA STORAGE

[fer_curt]

Hello. I'm new with Unitronics (and ladder).

The question is: database data (e.g. MI) are available after a power down? Or is in RAM Memory?

Thank you.

Fernando (Argentina)

[AlexUT]

Hi Fernando,

MI is not a Database, it is a Memoty Integer.

There is a backup batery to back up memory content, which include many other data types.

As a regular MIs are accessible after power cicle, but some modes of startup/reset will make init for internal memory.

So there is no yes or no. Answer is - it may have previous value and may not.

You need to know exactly what you need to implement, and there are other methods to save memory registers status.

I recommend you to start from some basic things and then go forward.

There is a forum topic which partially answers how to learn PLC.

http://www.unitronic...sp?TOPIC_ID=527

But I recommend you download VisiLogic from Unitronics web site. It includes free examples and help.

And it is free.

I will recommend you to download next 2 files from Unitronics site and start to read.

http://www.unitronics.com/Data/Uploads/VisiLogic_Software_New/VisiLogic%20-%20Getting_Started.pdf

http://www.unitronics.com/Data/Uploads/VisiLogic_Software_New/VisiLogic%20-%20Ladder%20Programming.pdf

There is an e-learning link:

http://www.unitronics.com/Content.aspx?page=e-Learning

I wish you success.

[fer_curt]

Thank you.

I'm reading what you send.

Regards