read/write using profibus dp

HI

I have cpu315-2dp and I want to connect it to danfoss inveter fc 300

my question is: how can read and write data to/from FC300  using profibus dp??? i do not want to use the protected blocks.plz advice????

thanks

zezo2016

HI

I have cpu315-2dp and I want to connect it to danfoss inveter fc 300

my question is: how can read and write data to/from FC300  using profibus dp??? i do not want to use the protected blocks.plz advice????

thanks

 Hello zezo,

hope helps you.

regards

hag010

thank you friends for support

I m interested to send or read less than 4 words

but how can I use load and transfer (or move) to read or write specific data like changing frequency value??

how can I get specific data address??

plz advice with small example???

Hello,

simple example, say that you want read actual Motor current, look to Daniel's pdf, address PIW268, it shows hex W#16#009B value, it means 1.55A. How to get this value? Ifyou want count with this data mathematically, for first you must convert needed data. I can make this simply quick, also with Ampere calculation f.ex:

"Motor_A" - REAL value

"Motor_A":=0.01*(INT_TO_REAL(WORD_TO_INT(PIW268)));

Via this scheme you can also get other data with specific offset, look for calculation also, it must be differently calculated with other data.

zezo2016

thank you friends for support

I m interested to send or read less than 4 words

but how can I use load and transfer (or move) to read or write specific data like changing frequency value??

how can I get specific data address??

plz advice with small example???

 hello zezo,

you performe the program as below on FC depending on your FC300 address (this is just an exemple).

Network1: read

L PIW 256      //Read in the first I/O input word .

T MW 20        //put it to memory word 20.

L PIW258       //Read in second I/O input word .

T MW 22        //put it to memory word 22.

Network2: write

L MW 10 //Set up  marker word 10.

T PQW256 //Output to first I/O output word.

L MW 12 // Set up marker word 12.

T PQW 258 // Output to second I/O output word.

NB: you can change MW by DB if you need.

hope this help you.

cordialement

hag010

HI

where can I find full example for danfoss fc300 using S7-300 ???

i hope find it as zip file....

Hello zezo;

I am sorry that the help provided up to now has not been sufficient.

Maybe if you had shown us what you have started programming up till now we could have provided hints or corrections that could have guided you better.

Meanwhile, a sample project was submitted by member Manmeetvirdi a few years back, and I provided a link to it in an earlier post; you can locate it in the following thread in the forum; and it is a zip file. 

https://support.industry.siemens.com/tf/ww/en/posts/29691/

By the way, I strongly suggest you try the Search box at the right of this page, it is a very useful tool when you need to find something on the Siemens Support pages; in this case, search for Danfoss VFD Profibus, for example. You never know what can be found this way...

Hope this helps,

Daniel Chartier