Stefano Bossi created PLC4X-240:
-----------------------------------
Summary: Protocol error in reading string
Key: PLC4X-240
URL: https://issues.apache.org/jira/browse/PLC4X-240
Project: Apache PLC4X
Issue Type: Bug
Components: Driver-S7
Affects Versions: 0.8.0
Reporter: Stefano Bossi
Attachments: Screenshot 2020-08-20 at 09.35.58.png,
captureString_v_0_6_0.pcapng, captureString_v_0_8_0_wrong.pcapng
Dear Christofer,
unfortunately I have found an another issue.
Via the HelloPlc app I am trying to read a string from my 1200 PLC; here
attached you could find the screenshot of the DB as configured in the PLC.
The command line I am using is:
{code:java}
"--connection-string 's7:tcp://192.168.1.192?controller-type=S7_1200'
--field-addresses '%DB1:6.0:STRING'"
{code}
With the library Version 0.8.0 after the patch Julian introduced here: [Pull
175|https://github.com/apache/plc4x/pull/175] which fix the reading of Array of
numbers, the reading of Strings doesn't work any more.
The error I could read via wireshark is:
{noformat}
[Error code: S7 protocol error: Wrong frames (0x8500)]
{noformat}
With the library version 0.6.0 the string is correctly read.
To help you in your work I have attached a capture with both the library
version.
Hope to be useful to fix the bug.
Regards,
Stefano Bossi
P.S. just to let you know, I am trying to read a complex DataBlock and this is
the reason I am experimenting with a lot of different types of variables. In
the near future I will try to read some many other and to write some too.
Unfortunately your code is far too complex for my java knowledge and I am not
able to fix the bug by myself but I could test the library and send detailed
report if I found some trouble. Hope this could help anyway.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
