Python syntax

[Warichet]

The Baustein is (finally) working.
I use it to display the status of the A/D converter and the thermostat (RTR).

Thanks to all for their kind help
If someone wants to play the beta tester, he is welcome.

[makki]

Maybe a pointer to it ?

http://www.python.org/download/
Just download the Windows binarys, this includes the "idle shell". perfect for testing..

Makki

[Warichet]

I think this is only used for the iKO and not for the internal variables used by the Bausteine.

OK, that might be a coherent explanation, indeed.
I must admit I totally missed this aspect of the problem.

Do you know of other "specialities" and "pit fall" ? before I discover them all , one by one .

Thank you.

[MarcNaroska]

But I was referring to the
Experte/Stammdaten/Kommunikationsobjekte/Intern
and there, the "Status byte" is defined as "8-Bit (0..255/EIS 2,6)". Isn't that an integer ?. Also, the title of the line is "Datentyp", sooo

Thats right, but I think this is only used for the iKO and not for the internal variables used by the Bausteine. Its a little bit like the "Variant" type in VB...

Well, I'm collecting a terrific amount of experience these days

I know what you experience with getting this kind of experience...

[Warichet]

As far as I know you only define inputs and outputs of a Baustein as numerical or alphanumerical.

That's perfectly correct
But I was referring to the
Experte/Stammdaten/Kommunikationsobjekte/Intern
and there, the "Status byte" is defined as "8-Bit (0..255/EIS 2,6)". Isn't that an integer ?. Also, the title of the line is "Datentyp", sooo

I'm sorry for my last post where I forgot the INT()

No problem . Thank you for the kind help, anyway.

Nevertheless, as long as it works now, don't worry about the why...

Oh well, I've a strong tendency to worry a bit and I'm willing to gain some experience with this #@$& stuff.
Someone said:

Experience is the sum of all errors

Well, I'm collecting a terrific amount of experience these days

[MarcNaroska]

Hey Raymond!

As far as I know you only define inputs and outputs of a Baustein as numerical or alphanumerical. Maybe all numerical variables are internally declared as double...

I'm sorry for my last post where I forgot the INT(), but I didn't had a look into my Baustein where I used this and wrote it just from memory...

Nevertheless, as long as it works now, don't worry about the why...

[Warichet]

please use

5012|0|"((int(EN[9]) & 1)==1)"|"EN[1]"|""|1|0|0|0

Mmm, you are right.
It works
Still confused, why casting an integer that is already declared as an integer, 0-255 ?
I guess this is a lesson from experience ?

Thank you

[Warichet]

you have at least 9 input-pins?

Yes. Anyway, the Experte would complain if the number of declared inputs doesn't match.
I want to translate a status byte into the clear text equivalent of each status bit set to 1 (see picture below).
At input Pin 9, I get the unknown status, Byte, 0-255
At input Pins 1-8, I fil-in the meaning of each bit, static 14Byte text
At output Pins 1-8, I collect the clear text, according to the bits set in the status byte. Rather simple, no ?

5012|0|"((int(EN[9]) & 1)==1)"|"EN[1]"|""|1|0|0|0

I thought about it for a while, but I'm pretty sure it's an integer. Maybe I should cast it to force the type integer ? But why ? it has been declared as type integer.

in the unlikely case you don't do this already:

Bingo !

install python idle shell for testing.

Sounds very interesting, this tool for chasing the
Maybe a pointer to it ?
I was already looking for a tools to easy a bit the Python writing, didn't find any compatible with the situation at hand.

Thank you.

[makki]

And another thing, in the unlikely case you don't do this already: install python idle shell for testing. I made myself a simple textfile to paste values for EN[x] and EC[x] for testing..

Makki

[Taxus]

To your primary question: please use

5012|0|"((int(EN[9]) & 1)==1)"|"EN[1]"|""|1|0|0|0

[Taxus]

Sorry for asking that - you have at least 9 input-pins?

[Warichet]

Hi Marc,

The solution which worked for me is:
"((EN[9] & 1)==1)" to test if bit 1 is set

I'm unable to make these lines work

5012|0|"((EN[9] & 1)==1)"|"EN[1]"|""|1|0|0|0
5012|0|"((EN[9] & 2)==2)"|"EN[2]"|""|2|0|0|0

Seems to be the same as yours, at least about the condition.
Again, when I force the condition, like this,

5012|0|""|"EN[1]"|""|1|0|0|0

it works. So, it has to do with the condition.
I guess I missed something.
Any clue ?

[Warichet]

EC does not contain the value of the input pin! It only says that there was a new telgramm on that input pin.

Thank you very much.
By looking at the existing examples, I see that EC is often used in the conditional part of the expression.

PS:
Isn't the behaviour of the "AND" in the condition, a bit disturbing ?

[MatthiasS]

No, it is not.

Example:

EC[1]| EN[2] + en[3] | |..|4

This says:

If you have a telegramm on pin 1 (maybe a minute trigger), then send the sum of EN 2 and EN 3 to outpu no. 4

EC does not contain the value of the input pin! It only says that there was a new telgramm on that input pin.

[Warichet]

EC[m] tells you, that the logic module has been triggered by a telegramm arriving at pin number m, and
EN[m] tells you the value of the telegramm.

ûh
Still confused
Can you tell me when to use the one or the other ?

Maybe it's more appropriate to use EC[m] for variable inputs ? as it does 2 things at a time: it says:
1) a telegramm has arrived at pin number m
2) the value of that telegramm

Is that correct ?