Hi, haven't got much experience when it comes to using data in programming so this may be an easy solve.

I'm using a 6ES7214-1AG40-0XB0 PLC and i'm wondering if its possible to store the values of Memory Words so that if power is removed from the PLC the values can be stored as at the moment they're wiped out every time.

TIA help (called also Information System) topic: Setting the retentive behavior of PLC tags

It says:

You set the retentivity for PLC tags in the PLC tag table for the S7-1200/S7-1500 CPU series. You can recognize the retentivity setting of a tag by the check mark set in the "Retain" column of the PLC tag table.

 Thanks for the reply,

Tried that but the full column is grey'd out so i'm unable to select the memory bit. Is there something that needs to be done before to give me access?

jacek d

TIA help (called also Information System) topic: Setting the retentive behavior of PLC tags

It says:

You set the retentivity for PLC tags in the PLC tag table for the S7-1200/S7-1500 CPU series. You can recognize the retentivity setting of a tag by the check mark set in the "Retain" column of the PLC tag table.

On the toolbar, click the "Retain" button.

The "Retain memory" dialog will open.

Set the width of the retentive memory area.

Enter the number of retentive memory bytes.

Example: If you enter "2", memory bytes MB 0 and MB 1 are retentive.

...

Click the "OK" button.

 Thats great, thanks for the help 

jacek d

So maybe a picture after all...

romasx

Or you can use created database and in database you can select any variable to have retention.

OT. In this context "DB" stands for a datablock.