[jira] [Created] (PLC4X-239) Read DTL (Date and Time)

["Stefano Bossi (Jira)" <ji...@apache.org>]

Stefano Bossi created PLC4X-239:
-----------------------------------

             Summary: Read DTL (Date and Time)
                 Key: PLC4X-239
                 URL: https://issues.apache.org/jira/browse/PLC4X-239
             Project: Apache PLC4X
          Issue Type: Bug
          Components: Driver-S7
    Affects Versions: 0.8.0
            Reporter: Stefano Bossi
         Attachments: Screenshot 2020-08-19 at 17.02.58.png, correctDateAndTimeRead_v0_6_0.pcapng, wrongDateAndTimeRead_v0_8_0.pcapng

Dear developers,

I have found a bug in trying to read a Date and Time field from a S7 1200 PLC, here are the informations to help you in fixing the code. 
 I am using the HelloPlc4x application for testing, with this command line:
{code:java}
"--connection-string 's7://192.168.1.192' --field-addresses '%DB1:264.0:DATE_AND_TIME'"{code}
The Data Block in the PLC is like in the uploaded jpeg. 
When I reach the line of code for the synchronous read request the code never return. 
Via Wire Shark I have captured the dialog and I found that in the Read Var request only 1 byte is requested instead of the expected 8.
I have tried with the version 0.6.0 and in that release of the library are requested 8 byte correctly (the parsing after receiving the data fail for somewhat reason but via wireshark I could see that the data in the response is the correct Date and Time value I have on the PLC)

I attach the pcap capture with the 0.8.0 version and for comparison the one with the 0.6.0

Hope that this could help to have a more robust library. 

Regards,
Stefano Bossi 
 




--
This message was sent by Atlassian Jira
(v8.3.4#803005)