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https://issues.apache.org/jira/browse/PLC4X-309?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17394077#comment-17394077
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Maida Baralić edited comment on PLC4X-309 at 8/5/21, 2:52 PM:
--------------------------------------------------------------
Just to make sure I'm doing this right, this is what I changed in the example:
!image-2021-08-05-16-40-56-113.png!
However on version 0.9.0-SNAPSHOT I get the following exception:
java.lang.ClassCastException: class [B cannot be cast to class java.lang.String
([B and java.lang.String are in module java.base of loader
'bootstrap')java.lang.ClassCastException: class [B cannot be cast to class
java.lang.String ([B and java.lang.String are in module java.base of loader
'bootstrap') at org.apache.plc4x.java.spi.values.PlcBYTE.of(PlcBYTE.java:61)
And when I stop in the debugger when PlcBYTE is constructed, this is how it
looks like:
!image-2021-08-05-16-42-26-978.png!
In version 0.8.0:
org.apache.plc4x.java.api.exceptions.PlcUnsupportedDataTypeException: Data Type
class [B Is not
supportedorg.apache.plc4x.java.api.exceptions.PlcUnsupportedDataTypeException:
Data Type class [B Is not supported at
org.apache.plc4x.java.spi.values.IEC61131ValueHandler.of(IEC61131ValueHandler.java:91)
was (Author: maidab):
Just to make sure I'm doing this right, this is what I changed in the example:
!image-2021-08-05-16-40-56-113.png!
However on version 0.9.0-SNAPSHOT I get the following exception:
java.lang.ClassCastException: class [B cannot be cast to class java.lang.String
([B and java.lang.String are in module java.base of loader
'bootstrap')java.lang.ClassCastException: class [B cannot be cast to class
java.lang.String ([B and java.lang.String are in module java.base of loader
'bootstrap') at org.apache.plc4x.java.spi.values.PlcBYTE.of(PlcBYTE.java:61)
And when I stop in the debugger when PlcBYTE is constructed, this is how it
looks like:
!image-2021-08-05-16-42-26-978.png!
In version 0.8.0:
It throws an exception: PlcUnsupportedDataTypeException: Data Type class [B Is
not supported
> [S7] Writing byte array not working
> -----------------------------------
>
> Key: PLC4X-309
> URL: https://issues.apache.org/jira/browse/PLC4X-309
> Project: Apache PLC4X
> Issue Type: Bug
> Components: Driver-S7
> Affects Versions: 0.8.0
> Environment: Windows 10
> Reporter: Maida Baralić
> Assignee: Christofer Dutz
> Priority: Major
> Attachments: DB4.pdf, PLCWrite.zip,
> image-2021-08-05-16-40-56-113.png, image-2021-08-05-16-42-26-978.png,
> write_byte_array_0.8.0.pcapng, write_byte_array_0.9.0.pcapng
>
>
> I'm having some issues with writing a byte array using S7 driver to the
> S7-1200.
> I'm a bit new to the communication with PLCs, so I'm not sure if I'm doing
> something wrong.
> I've followed the example of how to write a byte array to the connection,
> however I'm getting an INTERNAL_ERROR as a response code from the library and
> in the Wireshark the status from the PLC is inconsistent data type.
> I've attached both the sample project that's not working for me, my
> definition of byte array on the PLC and also Wireshark capture.
> It's possible that I'm not doing something right, however I can't figure it
> out.
> Writing of most of the single values is working, however the array is the
> problem. And as far as I understood from the code and documentation arrays
> should be supported.
> Any help would be appreciated.
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