Win 64

John Power — Sun, 11 Aug 2024 07:07:17 -0000

I'm having no luck with win11 and office 365, is there help available anywhere? I have been using it in win10 for years, and I can't aford to be without it now

Win 64

Piotr Bzdręga — Fri, 05 Jul 2024 17:28:28 -0000

I build x64 not stripped version (debug)

OnRead problem

Kazım Metin Kocadağ — Fri, 05 Jan 2024 08:07:17 -0000

Hello,
I have also problem with OnRead event. I'm using Siemens S7-1200 PLC.

NoDave.Active := True;
When I activated NoDave component, I can read data by OnRead event only one time.
I can't read periodically PLC data.
In order to read continuously, I was able to turn the Active feature TRUE and FALSE every time.
Is there any other way to do this?

LibNoDave & Delphi 2010

Kazım Metin Kocadağ — Fri, 05 Jan 2024 07:57:09 -0000

NoDave.Active := True;
When I activated NoDave component, I can read data by NoDaveRead event only one time.
I can't read periodically PLC data.
In order to read continuously, I was able to turn the Active feature TRUE and FALSE every time.
Is there any other way to do this?

LibNoDave & Delphi 2010

Matias_AR — Sun, 18 Jun 2023 15:18:52 -0000

This comment saved me hours of work. Attached are the 2 files, working properly in Delphi 11.

S7Online error and solution

Károly Sály — Wed, 28 Jul 2021 12:50:58 -0000

Dear Thomas, and Users,
I am an electrical engineer and PLC programmer. Usually, I use Siemens standard programs for PLC-PC communication. I tried libnodave out of curiosity, but it worked well only once in S7Online mode. After restarting the PC again once. I have now examined the error.
In libnodave version 0.8.5.1 from line 6379:
memset (fdr, 0.80);
fdr-> user = 110;
fdr-> field6 = 64;
fdr-> field8 = 16642;
a = _daveSCP_send (((int) dc-> iface-> fd.wfd), dc-> msgOut);
daveSCP_receive ((int) (dc-> iface-> fd.rfd), dc-> msgIn);

This is a TCL (Transport Control Layer) function which is an Open Request. The function returns a value to be referenced for further calls. In my program:
nRes = pInitBuffer (lpCon-> pIF, pSnd, TCL_SUBSYS, OPEN_REQ, 0, 0);
if (nRes) return nRes;
nRes = pRequest (lpCon-> pIF, lpCon-> nTimeOut, pSnd, pRcv, lpSysErr);
if (nRes) return nRes;
lpCon-> bOpened = TRUE;
lpCon-> nReference = pRcv-> TclApp.nReference;
The above code is available on my website.
S7ComX32
I'm sorry, but I use the Visual Studio 2010 with own libraries. Probably you can't compile everything in different environment. But I wrote a dll and you can use it.
If you have any question, my email: karoly.saly@matrasoft.hu
(And I,m sorry for my poor English)

Unabled to connect to PLC after a few/many hours

Arturas — Sun, 01 Nov 2020 11:02:04 -0000

I have exactly same problem. Did you find a solution?

Win 64

Stephan Berger — Fri, 15 Feb 2019 09:24:49 -0000

I'm running it on Win10 x64 - compiled as x86 app

Cheers, Stephan

Connection not being disposed properly? [C#]

Stephan Berger — Fri, 15 Feb 2019 09:17:24 -0000

Did You try using

_plcConnection.freePointer();
_plcInterface.disconnectAdapter();

btw - I only close connections on error...

Cheers, Stephan

Connection not being disposed properly? [C#]

Wade Ledbetter — Tue, 11 Dec 2018 17:31:46 -0000

Did you get any resolution on this? I'm having a problem with socket leaks on noisy connections. I'm getting ready to dig into the c-code to try to figure it out.

Recent posts to Discussion

Win 64

Win 64

OnRead problem

LibNoDave & Delphi 2010

LibNoDave & Delphi 2010

S7Online error and solution

Unabled to connect to PLC after a few/many hours

Win 64

Connection not being disposed properly? [C#]

Connection not being disposed properly? [C#]