Ganes10

Mike.Mc

I have 360 recipe values saved in a data block. Every time I make a change I have to go through all 360 values and compare the latest recipe data with the "start value" and adjust the start value so my download does not wipe out the recipe.

I would like to be able to upload the current DB values and save them in the "start values." Pl;ease see attached .jpg file.

Any ideas?

Hello Mike.Mc,
You can do the same using the snapshot function. Check here for the steps on the same - apply monitor values

Very good function but can we organize it by PLC programm?

I need it in order to place one button on HMI for "apply monitoring values as start values"  and I need to make second button "load start values".

Just to make some kind of backup  for technology engeneer which adjust process.

------------------------------------------------------------------------------------------
Split from S7-1200 Can DB current values (monitor value) be saved to start values.

You can do the following:

Create a "Work memory" DB

Create a "Load memory" DB duplicate of the work one above, you must highlight in its properties that it is being saved in the load memory of the plc

Then you can create a SAVE button on a HMI etc and write the entire contents of the "work memory" DB to the "Load memory" DB

On PLC start up to would write the Load to the Work memory or have a user push a button to do so.

When you download the PLC program use the functions you have just declared etc and then go online and compare your backup to the online version, see everything is the same except the Load Memory DB will show a difference... i.e. you saved different data during runtime

 Remember that the DB can not be optimized. 

William_B

George.Menderov

Very good function but can we organize it by PLC programm?

I need it in order to place one button on HMI for "apply monitoring values as start values"  and I need to make second button "load start values".

Just to make some kind of backup  for technology engeneer which adjust process.

Suggestion..
Have a duplicate DB that you can use for this purpose.
For the S7-1200 it is very easy to make the coding.

DB1 >> DB2: (backup)

 button1
---| |-------[MOVE]

    "myDB1" -[    ]- "myDB2"

DB2 >> DB1: (retrieve)

 button2
---| |-------[MOVE]

    "myDB2" -[    ]- "myDB1"

Does this help you?
w