[Bug]: s7-1500 NullPointerException

Question

[Bug]: s7-1500 NullPointerException

anganing opened this issue a year ago · comments

anganing commented a year ago

What happened?

help me,please!
i want to read s7-1500, but s null pointer exception occurred! hear is my code:

the exception:

Version

v0.10.0

Programming Languages

plc4j
plc4go
plc4c
plc4net

Protocols

hongjinlin · Answer 1 · Fri Jun 30 2023 17:22:48 GMT+0800 (China Standard Time)

Hello, is your s7-1500 a real device?

César José García León · Answer 2 · Fri Jun 30 2023 20:47:44 GMT+0800 (China Standard Time)

Hello,

If it is a physical equipment, check the address of the device or the CP.
If it is the Advanced PLCSIM, you must assign it an IP address within your subnet.
If it's not the advanced, standard PLCSIM, you can try [1].
https://nettoplcsim.sourceforge.net/

anganing · Answer 3 · Mon Jul 03 2023 09:22:44 GMT+0800 (China Standard Time)

@hongjinlin
no, I use snap7 server demo.

anganing · Answer 4 · Mon Jul 03 2023 09:27:21 GMT+0800 (China Standard Time)

@glcj
i use snap7 server demo. i repalce it to NetToPLCSim, when i connect to the server:

heyoulin · Answer 5 · Mon Jul 03 2023 09:50:34 GMT+0800 (China Standard Time)

try my repository. It's NettyPlcConnection bug

anganing · Answer 6 · Mon Jul 03 2023 09:55:22 GMT+0800 (China Standard Time)

@spnettec how to use your repository?

anganing · Answer 7 · Mon Jul 03 2023 09:56:55 GMT+0800 (China Standard Time)

@spnettec the payload is null,It's NettyPlcConnection bug?

hongjinlin · Answer 8 · Mon Jul 03 2023 10:26:02 GMT+0800 (China Standard Time)

@hongjinlin no, I use snap7 server demo.

It seems that the snap7 server is not started successfully. Can you confirm if your 127.0.0.1:102 is listening?

anganing · Answer 9 · Mon Jul 03 2023 11:20:45 GMT+0800 (China Standard Time)

@hongjinlin no, I use snap7 server demo.

It seems that the snap7 server is not started successfully. Can you confirm if your 127.0.0.1:102 is listening?

yes, i sure. that is i use another tool with port 102 cause Permission denied

hongjinlin · Answer 10 · Mon Jul 03 2023 13:45:58 GMT+0800 (China Standard Time)

@hongjinlin no, I use snap7 server demo.

It seems that the snap7 server is not started successfully. Can you confirm if your 127.0.0.1:102 is listening?

yes, i sure. that is i use another tool with port 102 cause Permission denied

Hi, I think you can use the snap7 client to determine whether the data can be read normally. Or if you just want to confirm whether the PLC4X is normally used in your scenario, you can try it with a physical device.

anganing · Answer 11 · Mon Jul 03 2023 14:37:13 GMT+0800 (China Standard Time)

thanks a lot, I found the bug: invalid resource address. I think the plc4x's docs are not enough detailed,some times bugs given

Sebastian Rühl · Answer 12 · Mon Jul 03 2023 21:37:29 GMT+0800 (China Standard Time)

whatever happens a NPE shouldn't occur there. @glcj any idea?

César José García León · Answer 13 · Tue Jul 04 2023 10:13:37 GMT+0800 (China Standard Time)

Hello,

I'll take note, but it must be associated with regex processing.

It can be seen that it has erroneous addresses, for security it should pre-process the PlcTags before carrying out the build and discard those that contain errors.

From that point of view it is not so unreasonable to avoid execution with error tags.

Kind regards.

anganing · Answer 14 · Wed Jul 05 2023 13:40:23 GMT+0800 (China Standard Time)

Hello,

I'll take note, but it must be associated with regex processing.

It can be seen that it has erroneous addresses, for security it should pre-process the PlcTags before carrying out the build and discard those that contain errors.

From that point of view it is not so unreasonable to avoid execution with error tags.

Kind regards.

Thank you very much for your help. I hope the documentation can be more detailed (with more usage examples), which can help beginners quickly use it