1212 snap7 connection problems

[John den Hartog]

Hi
I have a 1212 with firmware V4.1.1
I have read the snap7 reference manual, esp. the topics about 1200
I have read the other discussions about the 1200 control.
But somehow I cannot get it working:

I run the ClientDemo. It connects (so IP address, rack 0, slot 0 are OK)
But when I do a [data read/write] it only mentions: CLI : function refused by CPU (unknown error)

The protections are set to "Full Access" and "Permit Access with PUT/GET communication" is checked
After that I downloaded my User Program. So this should be OK.
The DB protection I cannot set in TIA. That should also not be the problem because according the
manuals, this should only be set for S7 1500.

Any help on how to progress / debug is appreciated.
I would like to continue with Snap7, it is a great program!

thanks, John

Now I was able to uncheck the "optimized block access" for a new global DB.
But if I try to do a Data read on this DB (3), I always get a "function refused by CPU". I'm afraid it is related to the HW version V4 or firmware version V4.1.1.
Or is there somebody who got it running with those versions?

[John den Hartog]

Hi all.
I found out that going back in FirmWare from V4.1.1 to V4.0 helped.
Now I can address the 1212 with the directions mentioned by Davide.

And, Snap7 (+python) is a very nice piece of software. Well done.

txs, John

[Davide Nardella]

I'm not very happy with this...
Apart for the new protocol, S71200 (limited to data I/O) is claimed to be compatible with the common HMI/OPC Server which use the standard S7 protocol as Snap7.
Why someone must to downgrade the firmware ????

[Davide Nardella]

Just tested Snap7 with S71200 with 4.1.6 firmware and works fine.
DB unoptimized, full HMI R/W Access and Get/Put allowed.

[Bart Peters]

Where can I setup the Get/Put settings? I can only find DB unoptimized and the full HMI R/W access