Modbus TCP/IP..... is it working ?

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04 Apr 2010 17:21 - 04 Apr 2010 17:26 #2509 by cmorley
It would be nice to add this to the wiki
maybe here:
wiki.linuxcnc.org/cgi-bin/emcinfo.pl?ClassicLadderExamples

What slaves devices are you using?
Last edit: 04 Apr 2010 17:26 by cmorley.

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04 Apr 2010 20:07 #2510 by cmorley
Maybe you can figure out how to connect CL as a TCP slave as well.
Its possible but not tried on EMC

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05 Apr 2010 09:16 #2517 by bigalex
Hello Chris....
At the moment I'm using two different slaves but same manufacturer (Schneider Electric) the first one is named Zelio (it is a smart relay)
and the second one is named TWIDO (it is a small class full feature PLC very flexible and scalable).
The Modbus TCP/IP seems to work fine and in this way it very easy to add a lot of Analog and Digital I/Os to be used by ClassicLadder PLC task (and connected woth EMC2).
For the Wiki use I need to know how to implement the information into, so please can you help me ?
About the Modbus Slave functinality I will test this soon and I will give to you the feedback.
As a Modbus Slave ClassicLadder will only be passive into a Modbus network (because Modbus is not a multimaster network class).
This means an external master manage the Read and Write functionalities.

bigalex :blink:

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05 Apr 2010 17:57 #2520 by cmorley
look here for steps to add to wiki:

wiki.linuxcnc.org/cgi-bin/emcinfo.pl?BasicSteps

Yes to test classicladder as a slave you must have two compoters running classicladder (one as master) or have some other master.
I hope you can figure this out.

is this similar to your plc?:

cgi.ebay.com/TELEMECANIQUE-TWIDO-STARTER...?hash=item4cee833b72

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06 Apr 2010 12:20 - 06 Apr 2010 12:26 #2530 by bigalex
Yes it is Chris.
The plc that you show is the modular one (there is also a compact version that is what I'm using) and you can find out more information about it on internet at the official website
of Schneider Electric for TWIDO TAKE A LOOK . By default the built in communication port can be used also as a Modbus over serial line . TWIDO can have a second communication port (very cheap) and attacched to this is possible to use a gateway Ethernet-->serial line (named Twidoport) and communicate with Modbus TCP/IP.
The code for the gateway is 499TWD01100.
Anyway for the application of EMC2 and CL+Modbus TCP/IP I think that every hardware device that is Modbus TCP/IP compliance can be used.


bigalex :blink:
Last edit: 06 Apr 2010 12:26 by bigalex.

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15 May 2010 20:33 #2867 by cmorley
Did you get a chance to add to the wiki?

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16 May 2010 08:52 #2872 by bigalex
Hello Chris....
At the moment I'm very busy so I need to wait a couple of weeks , because I want to test also the Modbus TCP/IP slave mode.
I've already the material and the software tools to test it ...... but the time.
So please be patient and I will do the job.
I check every day the messages on the forum to be up to date about the arguments that the users discuss.

bigalex :blink:

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08 Jul 2010 16:11 #3305 by robertofonte
Sorry for my English.

I have siemens material (S7-200, S7-1200, S7-300) and Schneider can do some tests.

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22 Oct 2010 13:28 #4793 by steva
Hello to forum,
where the stalled project.

Give us more details.
How do I connect EMC-CL with modbus to plc simulator on www.plcsimulator.org?

I ask for concrete examples.

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24 Oct 2010 03:12 #4816 by cmorley
I used a usb to serial adapter on the windows side.
to connect to the EMC computer I used a special cable.
I believe it was a serial lap-link cable. Used for connectting two computers together using the serial port.
This cable had four female connectors on it, because it could except either the db25 or db 9 connectors.

As for TCP , I never could figure it out. But someone else did.

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