Step7 bcd

ArXi · May 24, 2011

hello guys,
here's my problem... i cant find anywhere how to set counter for giving me BCD code in outputs... maybe someone can tell how to do it or give me some tips or show me the way?
i have wrote programme for counting up things... now i want to connect 7-segment display to see how number is increasing...

iant · May 24, 2011

the advice i have had in the past is simply to add 1 to a register for a counter
as far as BCD is concerned i think i remember a standard library conversion function - dont have the software here sorry

TurpoUrpo · May 24, 2011

Step7 counters have output: CV_BCD. That is BCD (as name suggest).

ArXi · May 27, 2011

ok

but can any1 tell how to send BCD code from cv_bcd to outputs Q0.1 Q0.2 Q0.3 Q0.4 ?

KalleOlsen · May 27, 2011

ArXi said:
ok but can any1 tell how to send BCD code from cv_bcd to outputs Q0.1 Q0.2 Q0.3 Q0.4 ?

Connect a LW or MW to the counter. Assign the L or M -bits to outputs.

Kalle

ArXi · May 29, 2011

am I doint right ? how to assign bits to outputs ?

KalleOlsen · May 29, 2011

M5.0 Q0.1
-I I-------( )
:
M5.3 Q0.4
-I I-------( )

The MW4 consists of MB4+MB5. M 5.0 is LSB. That means when you start to count, the first bits affected are in MB5.

====
Try this in monitor/modify: (presuming these bytes (or bits) aren't used in the program).
Input MB104 HEX
to MB107 HEX
and MW104 HEX
and MD104 HEX
Now, if you write DW#16#12345678 in MD104 you'll see how the bytes are arranged.

Kalle

ArXi · May 29, 2011

Big thank you, Kalle. everything is working fine...

Step7 bcd

ArXi

Member

iant

Lifetime Supporting Member + Moderator

TurpoUrpo

Lifetime Supporting Member

ArXi

Member

KalleOlsen

Member

ArXi

Member

KalleOlsen

Member

ArXi

Member

Similar Topics