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Data Acquisition
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Hi,
I ll see next week a prospect who is using Beckhoff PLCs.
I see in PcVue the Twincat protocol (but no documentation :unsure: )
Anybody knows how this protocol works in PcVue? Because for the equipement configuration, it needs the AMS Net ID, which is for me the address of the PC where twincat is installed.
Can we communicate directly with the PLCs or only with the PC where Twincat is installed?
Manu
Posted : 05/11/2013 8:52 pm
Hi Manu,
I have tested this protocol with the Malaysian Beckhoff team and it works well.
Twincat is using a gateway provided by Beckhoff. This gateway is installed in any computer on the network.
A documentation is available but, sorry, i couldn't retrieve it on my emails.
Ask Manu Duval to send it to you.
Posted : 06/11/2013 8:32 am
Posted : 06/11/2013 2:38 pm
Thank you guys!!! :woohoo:
Posted : 06/11/2013 3:20 pm
Hi Manu,
Attached version 1.2 of the document.
By the way, it appears to be a good practice (that in case you have control over the structure of the TwinCat program) to only expose a global byte array for access to the TwinCat data points.
That way you reduce the effort to manage the variable definition file, which is the most annoying part when configuring this driver, and you can treat it like any typical, traditional address based protocol.
For example when the name of the array is "GLOBAL" and its dimension is 700 bytes the variable definition file would just look like that:
.GLOBAL, 700
We are going to add this trick to the documentation as soon as possible.
Posted : 07/11/2013 2:47 pm