[fpc-pascal] Sending Hex codes over TCP/IP

[James Richters]

Thanks!  That is exactly what I’ve been trying to figure out.   Just one simple unit, not a whole huge package that is so complicated I can’t follow it.   Your MODBUS  TCP implementation is very easy for me to follow and to see what’s going on.   I wrote my own MODBUS RTU unit, so I’m familiar with the process.  I don’t need a whole lot of functionality or any of the really advanced things that could be done with MODBUS, I just want to turn some relays on and off and check their status.   This will work perfectly for that.
 
Thank you very much, this will help greatly!
 
James
 
 
From: fpc-pascal <fpc-pascal-bounces at lists.freepascal.org> On Behalf Of LacaK via fpc-pascal
Sent: Sunday, September 13, 2020 5:56 AM
To: james at productionautomation.net; FPC-Pascal users discussions <fpc-pascal at lists.freepascal.org>
Cc: LacaK <lacak at zoznam.sk>
Subject: Re: [fpc-pascal] Sending Hex codes over TCP/IP
 
Dňa Fri, 11 Sep 2020 19:13:38 -0400
James Richters via fpc-pascal napísal:
> What I'm trying to do is control some different ethernet relays. 
> They use
> MODBUS TCP. I'm trying to keep it as simple as possible. I found 
>a modbus
> library for Pascal but it was way over complicated for that I need 
>to do,
> and while it looks like it would do some cool stuff, the one 
>function I
> need wasn't implemented yet.
> 



You can look at my simple MODBUS TCP implementation ... http://lacak.users.sourceforge.net/freepascal.html
I think that it is simple/straightforward to understand.
If there is something not implemented yet I can add it ... (I just implemented what I needed for my work project)



-Laco.



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