[Bug]: s7-1500 NullPointerException

[anganing]

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

• AB-Ethernet
• ADS /AMS
• BACnet/IP
• CANopen
• DeltaV
• DF1
• EtherNet/IP
• Firmata
• KNXnet/IP
• Modbus
• OPC-UA
• S7

[hongjinlin]

Hello, is your s7-1500 a real device?

[glcj]

Hello,

1. If it is a physical equipment, check the address of the device or the CP.

2. If it is the Advanced PLCSIM, you must assign it an IP address within your subnet.

3. If it's not the advanced, standard PLCSIM, you can try [1].

4. https://nettoplcsim.sourceforge.net/

[anganing]

@hongjinlin
no, I use snap7 server demo.

[anganing]

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

[spnettec]

try my repository. It's NettyPlcConnection bug

[anganing]

@spnettec how to use your repository?

[anganing]

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

[hongjinlin]

@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]

@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]

@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]

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