Maximilian created PLC4X-343:
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Summary: Issue with Modbus Write -- PLC Connection Exception:
Error Creating Channel
Key: PLC4X-343
URL: https://issues.apache.org/jira/browse/PLC4X-343
Project: Apache PLC4X
Issue Type: Bug
Components: Driver-Modbus
Affects Versions: 0.9.1
Reporter: Maximilian
Attachments: image-2022-05-30-13-31-56-320.png, mb1.png, mb2.png,
mb3.png
Hi!
Thanks for supporting this library.
I'd like to seek your advice on an issue I'm having surrounding *writing* to
Modbus registers.
I have a code snippet as follows:
!image-2022-05-30-13-31-56-320.png!
I'm able to make about ~100 requests successfully, until I encounter a{{{} PLC
Connection Exception: Error creating channel error{}}}. This is consistent with
multiple tries.
I've tried using {{CachedDriverManagers }}/ {{{}PooledDriverManagers{}}}, but
this will result in a NullPointerException when I tried to use its
{{PlcConnection }}object to create a {{{}PlcWriteRequest.Builder{}}}.
Essentially, the "builder" object is null:
!mb2.png!
However, I'm able to create {{PlcReadRequest }}builders for reading data; no
{{{}NullPointerExceptions{}}}:
This is how I'm creating the {{{}CachedDriverManager{}}}:
!mb3.png!
I've noticed that I will never encounter a maximum buffer limit reached for
connections created from the {{{}CachedDriverManager{}}}, used to make Modbus
read requests. Hence, I considered using connections created from the
CachedDriverManger to make Modbus write requests, {*}however I get a
NullPointerException for the "builder"{*}.
Hope you could help point me in the right direction, been stuck at this for a
couple of days.
Thanks!
Regards,
Max
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