Closed robertsabo0 closed 4 years ago
Hi Robert, TwinCAT ADS .NET from: https://infosys.beckhoff.com/english.php?content=../content/1033/tcadsnet/html/twincat.ads.intro.html&id= requires TwinCAT ADS-DLL from your TwinCAT Installation :-( https://infosys.beckhoff.com/content/1033/tcadsdll2/html/tcadsdll_intro.htm?id=3725064819111272020
The opensource library (AdsLib) you find here on GitHub is intended as a replacement for TwinCAT ADS-DLL, but the feature set is not 100% equal. The opensource library is limited by:
AdsSyncReadReqEx2
)I don't know the details of TwinCAT ADS .NET, but I am pretty sure the missing router is already a show stopper to make it work with opensource AdsLib.
I know of a Python wrapper which uses AdsLib: https://github.com/stlehmann/pyads
Maybe you find a .NET fork on github, too: https://github.com/Beckhoff/ADS/network/members
Regards, Patrick
There is an ADS driver on Sourceforge that uses the TCP/IP stack instead of the AMS router, so it will possibly work on Linux under Mono:
https://sourceforge.net/projects/twincatads/
The catch is the TwinCAT 2 AMS router has a flaw in which it will catch traffic and no matter which TCP/IP port it is received on, it will respond to the standard TwinCAT port, therefore the driver will not work if TwinCAT 2 is installed on the same PC (Of course Linux is not an issue). So far my tests seem to show this flaw does not exist in the TwinCAT 3 router.
Dear,
I'm working on implementation of reading PLC with TwinCAT 2 from .NET application. On windows, I succeed, and all is good. But on Linux (using mono) I cannot connect to PLC.
I installed c++ lib as docs says (https://github.com/Beckhoff/ADS)
When I run my code I got error that dll is not found:
Unhandled Exception: TwinCAT.Ads.AdsInitializeException: ADS could not be initialized because the 'TcAdsDll.dll' is not found! Please check DLL search paths! (tcadsdll.dll) ---> System.DllNotFoundException: tcadsdll.dll at (wrapper managed-to-native) TwinCAT.Ads.Internal.TcAdsDllWrapper+UnsafeNativeMethods.AdsGetDllVersion()
I guess the reason is that I installed c++ lib for ADS, not .NET.
Am I wrong? Is it possible to read TwinCAT using .NET from Linux?