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gijzelaerr / python-snap7

A Python wrapper for the snap7 PLC communication library
http://python-snap7.readthedocs.org/
MIT License
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Function Refused By CPU #454

Closed GleeisonRodrigues closed 11 months ago

GleeisonRodrigues commented 11 months ago

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)

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nikteliy commented 11 months ago

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

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GleeisonRodrigues commented 11 months ago

Hi @nikteliy , I did that. image

nikteliy commented 11 months ago

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. output

GleeisonRodrigues commented 11 months ago

Hi I also did that :(