Hi Niclas,
Now your're borrowing my reasoning to use PLC4X over OPC UA to argument for
Serial communication ... I like it ;-)
Yeah, I know that industrial hardware tends to be run a tad longer than a
typical IPhone ... and I agree ... we need to get serial in shape.
I did notice with the Firmata
On Tue, Jun 30, 2020 at 2:31 PM Christofer Dutz
wrote:
> But can we assume that only one protocol is handled over one serial
> interface? So not multiple Modbus devices sharing with multiple S5 devices
> ...
>
So, I have never seen anyone trying multiple protocols on the same port, so
that is a
Hi all,
and thank you Niclas for your very detailed post.
Indeed I think you made me realize something I didn't realize till now: You can
connect multiple devices to a serial Interface.
For me, from the first zero-modem-cable I welded to play command and conquer
against a friend, serial interfa
Hi Niclas,
You are right on all points. I have not tested the Modbus serial driver,
but I am very interested that it works on Multidrop connections.
Version 0.7.0 is based on Mspec, so a proposal could be:
1. Modify the PLCField to include the UID of the device within the frame
from the address
Ok, let's dissect this...
1. There are many devices connected to a serial ModBus port.
2. ModBus (and every other serial protocol I have dealt with) are not
"connection" oriented, but packets, most of the time very small. The
"connection" metaphor in PLC4X for non-TCP comms is actually quite poor
Hi all,
sorry for joining in the party late ... but hopefully not too late.
Regarding making the serial port part of the connection string ... I have to
admit that right now I couldn't imagine how to not have it in there and not
over-complicate things for the users. Yes, if you create a connect
Hey,
yes, its in the module scraper or plc-scraper.
Its easily configurable by yaml, json or programmatically.
Julian
Am 25.06.20, 10:30 schrieb "Niclas Hedhman" :
Thanks
Another question; is there any "loop" system that just continuously reads
until I tell it to stop?
On
Thanks
Another question; is there any "loop" system that just continuously reads
until I tell it to stop?
On Thu, Jun 25, 2020, 15:16 Julian Feinauer
wrote:
> Hi Nic,
>
> I have to dig in a bit later to give you good answers but AFAIR the
> connection can be left open and configuration shou
Hi Nic,
I have to dig in a bit later to give you good answers but AFAIR the connection
can be left open and configuration should be as you wrote it.
I also did some tests with it but that was some months ago...
Hope to have some more information later.
Julian
Am 25.06.20, 05:58 schrieb "Nicla
Hi,
IIUIC, the connection string for Serial Modbus would be something like;
modbus:serial:/dev/ttyS0?unit-identifier=7
assuming I want to communicate with device with address 7.
That would mean that I have one connection per device I talk to over a
single serial port. Is that correct? (Pers
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