It is possible at all?

I have an issue almost in accuracy same that I have found in official forum Siemens:

oshaman wrote:

“I have recently replaced some analogue Asi modules type 3RK1207-1BQ00-0AA3 with newer type; 3RK1207-1BQ40-0AA3 2AI S7.3.D. Whilst the old units were working OK, I have a problem in that the new modules cannot read analogue signals. I have some DP/ASi link 20E as ASi master to these modules. How can I get these modules to read analogue signals. Are there any FBs or SFCs that I need to use. What is difference between these modules because I had thought that it should have been a direct swoop with no problem at all.”

The question has been successfully solved because Siemens gateway Link 20E support ASi 2.1 specification. More over, Siemens offers two ways for ASi slaves S-7.3 reading through ASi 2.1 Profibus-ASi gateway - by means of use SFC59 (easier, but less diagnostic information) and SFB52 (slightly hard, but more of diagnostic information).

My issue is more difficult because I deals with ASi 2.0 AC1005 gateway from ifm.

I have not found out any information that it is impossibly to read out ASi slave of S-7.3 profil through gateway ASi 2.0, but I have not find out any information about how to do it too!

PS: At the moment, for reading analogue input of ASi slave of profile S-7.1 is used not clearly whence taken FC10 “ASI: Analog value ASI”, author - Siemens. The programme block does not read S-7.3 slaves, but ASi 2.0 gateway AC1005 sees it without any communication errors, but read value - 7FFF constantly.

New SFC59 and SFB52 blocks read value:
- if number of slave is 16 and less - 7FFF
- if number is 17… 31 - 0.
Errors:
“DP protocol error at layer 2 (for example, slave failure or bus problems)” if SFC59 used
“no DPV1 protocol element is used” for SFB52.

Does anyone can help me?

This forum is for AS-interface UK.
IFM are not members.
I suggest you contact IFM directly by email to resoolve your issue.

As for ifm all is clear to me, thanks.

My question is exclusively theoretical:
It is possible to read out a slave of profile S-7.3 through a gateway of specification ASi-2.0 ?

only YES or NOT

That is an issue with a specific manufacturer, in this case SIEMENS.
I have notified our SIEMENS member of this question.
SIEMENS UK supports it’s UK customers.

Hi Zova

I am not familiar with the exact part numbers you quote here because they belong to particular manufacturers. But behind your question you raise a general point which will be of interest to many users.. If you have a 2.0 master/gateway then the slaves you use on the network will need to be suitable for use on 2.0. If you then replace a (2.0) slave with one which requires a minimum 2.1 or 3.0 then it may not work. Certain analogue slaves for example will only work on 3.0 . In this case you will have to upgrade your network, by changing your master.

In some cases a 3.0 or 2.1 slave will work on a 2.0 network with reduced functionality, but the ID code will be different to a slave originally supplied for 2.0 , so changing a slave could be a fraction more complicated than an exact “like for like” swap.

So there is no general YES or No rule.

My guess is that you need specific advice fromm your local Siemens supplier, for that part number. If any Siemens user on this forum can help you I am sure that they will.

We have used these anaolgie modules with a DP/AS-I master - hoth the old one (Link 20E) and the new one (Link 20E advanced.

The old one makes it very hard. You cannot assign an address to the module, you need to set up a DB for your entire AS-I network - your analogue signal will be in this DB somewhere. Siemens have a manual (of cource) to help you through this using the SFCs you mention.

The newer master makes it much easier. the AS-I hardware config allows you to assign an address to each analogue channel. This address (outide the normal I/O addressing area) can simply be read directly in the PLC program. Don’t use node 1 for your module with the new master. Node 1B is reserved for diagnostics info. Doesn’t tell you anywhere, you just have to find out!

Jon