S7-300 Profibus Master and non-Siemens device as Profibus Slave

Hello Guys,

I have s7-315-2 PN/DP with integrated DP. I have no CP module. PLC should be DP master.

ON other side there is basler device DECS250 ordered to support Profibus.

I download and installed GSD file  from BAsler website. Once I have add to my hardware configuration situation looks like on PIC1, pls take a look.

I also provide everything inside DECS250 manual about Profibus communication, take a look pic 2.

Here I will paste most important:

"4. Select modules from the GSD file to be part of the data exchange. Selecting the cyclic parameters is recommended. The cyclic parameters are comprised of the first 12 instances in the PROFIBUS parameters table (Table 39). The first 25 parameters, which make up the first five instances, are float types. The next 59 parameters, which make up the last seven instances of cyclic parameters, are UINT8 types.

It is not possible to write a portion of an instance by specifying a length smaller than the size of the instance. To modify a single parameter, read the entire instance, update the desired parameter, and write the entire instance back to the device

PROFIBUS parameters are listed in Table 39. Instances with names ending in “cyclic” are automatically transmitted at a periodic rate. All other instances are acyclic and transmitted only when requested by the PLC."

I also provide you part of the parameter table.

1. My question is how can I can partial data from this parameter table. So I want to take first 10 float which are cyclic parameters according this manual, but I also want to take floats somewhere in the middle of the table and also I want to change some data from PLC from the middle of the table.

So idk how I can poitn somewhere in the middle of the table from PLC. WHen I look my hardware configuration should I add whole table in it? 

2. take a read this "All other instances are acyclic and transmitted only when requested by the PLC."" . Since I'm doing all from hardware configuration (no functions for read and send) how can I required something from my SLAVE? 

MAybe something like this or?

L  variable_value

T PQW300

Will this work and where this PQW300 adress is actually pointing inside DECS250 parameter table).

Whats the correlation between my hardware configuration addresses and slave parameter table?

I still got no devices with me, but Im trying to prepare program before equipment arrives

Here are links for pics:

Hello,
I understand their manual this way (just a guess from me).
You must read/write what they call an instance completely (no partial read/write).
Instance 1 is composed of 11 floats ==> 44 bytes in total.

In step7, in the slave slot definition, the first slot should be an universal module of 44 input bytes.
Try to use "total length". Like in the screenshot in annex.

If the slave accepts that, try now to read the data using SFC14.
An alternative is to place the 44 bytes in the process image of the CPU.