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Topic starter
My customer use our native protocol communcation with S7-1200, they want to read the "I" and "Q", How to do it?
Posted : 15/07/2016 7:55 am
Hi Xiao Dong
Our driver doesn't read directly these addresses (dunno why). User has to copy the 'I'/'Q' data to a supported address range like DBW.
Nico
Posted : 15/07/2016 9:04 am
Topic starter
Ok,a little strange.
Posted : 19/07/2016 10:13 am
No it is not because (not sure 100%) the stack we are using (from third party) doesn't allow reading that type of data.
By the way, it is always a better design to store in a dedicated address space the data for the Scada.
I let Manu confirming what I said.
Nico
Posted : 19/07/2016 10:30 am
Hello all
Actually I and Q area are accessible directly but as Nicolas rightly pointed it is good practise to have an internal area within the PLC for exchanging data with the supervisor.
EW is for input I
and AW is for Output.
The use of AW and EW is the german equivalent to I and Q.
Posted : 21/07/2016 5:00 pm
Haha thank you Manu! Goot to know.
@Robin: If you read that I advise you add this point in the Help
@Xiao Dong: Now you have the good answer!
Posted : 22/07/2016 11:20 am
Topic starter
Thanks for your answer.
Posted : 22/07/2016 12:57 pm