Function Refused By CPU

[GleeisonRodrigues]

Having an issue with try to read a DB. My connection is successful but I get the rejection on the read function. In the DB example I have created a global DB26 and I am trying to read DB26.00. The db optimization is turned off as per the instruction and also I enable the features ALLOW PUT/GET .

CPU is 6ES7 214-1HG40-0XB0 CPU 1214C DC/DC/Rly Firmware Version 4.2

python version 3.11.4

Reading Example:

import snap7.client as c
from snap7.util import *
from snap7.types import *

if name == "main":
plc = c.Client()
plc.connect('192.168.0.20',0,1)
print("Connection Sucessful")
data = plc.db_read(26,0,1)

[nikteliy]

Hi @GleeisonRodrigues
Check the properties of your DB block. The optimized block access checkbox should be unchecked.

[GleeisonRodrigues]

Hi @nikteliy , I did that.

[nikteliy]

Did you reinitialize the db after that?
Have you uploaded the hardware configuration to the PLC after making changes?
It works for me, but i have firmware 4.0.

[GleeisonRodrigues]

Hi I also did that :(

[nikteliy]

I've run out of ideas. Can you post here the project archive, so I can test it on my PLC? I only need the hardware config and that DB.

[GleeisonRodrigues]

CENTRAL_BALANCE.zip

Hi @nikteliy , here is my project. thanks for your help.

[nikteliy]

Sorry, I cannot open it. I only have TIA Portal v15.1, and older versions don't work with projects created in a newer version.

[gijzelaerr]

Closing as stale. This was an S7-1200 configuration issue. Uncheck 'optimized block access' and reinitialize the DB after the change.