Dear Experts,

We are upgrading a S5 155U PLC to S7-400  PLC. In this, we had a CP524 communicating with S5 Sinumerik CP315(CP373) module. 

Now, we are using a S7 CP 441-1 card for the same Sinumerik system.

We noticed in COM 525 and SINPS 315 applications that, the Procedure used is 3964 R and protocol used is RK512 (in CP524) and AS 512 (in CP315 - Sinumerik).

1. Are RK 512 and AS 512 the same? Are the Message frame structures same?

2. We got to know the message frame structure of RK 512 in Entry ID: 12932189 . Can we get similar post/FAQ for the message frame structure of AS 512?

In our S7 441-1 CP, we have parameterized it to use 3964R procedure on TTY interface. We are using BSEND AND BRCV blocks for sending and receiving data in S7 400.

Can anyone please help us with this?

Thank you,

Sudheendra

Dear Kaulquappe,

Thank you for the reply.

But is RK 512 and AS 512 the same?

and any chance of getting the message frame structure of AS 512?

Regards,

Sudheendra

Hello Sudheendra;

I am not familiar with AS 512. The programming protocol used by S5 PLCs was known as AS 511.

You already have a brief description of the RK 512 procedure, which is an add-on to the 3964R serial communication protocol used by S5 processors. There is very little information on the AS 511 protocol,(Siemens would protect that type of information), but you might find enough in chapters 2,  3 and 4 of this old communications manual for S5 PLCs to see how different they were:

https://support.industry.siemens.com/cs/be/en/view/1137086

This manual for the  Kepware AS 511 driver explains how they use the AS 511 format for their OPC servers, it may offer some interesting information for you:

http://www.logic-control.com/datasheets/14/Manuals/Drivers/Siemens/Siemens%20S5%20Driver.pdf

Hope this helps,

Daniel Chartier

Hello Mr. Daniel,

Thank you for your views and guidance. I will definitely go through the manuals and see if it helps.

Please refer to the attachments of the configuration screenshots from applications SINPC315 and COM 524, which are used for configuration of CP315/CP373 of Sinumerik system and CP 524 of S5 PLC respectively.

From the program backup of these, I got to know that the protocol used is AS512 in Simumerik side and RK 512 in CP524 side.

Hence I wonder whether RK 512 and AS 512 are same.

Regards,

Sudheendra

Hello Sudheendra;

As I mentionned before, I am not familiar with AS512, and less so with Sineumerik systems.

The second screenshot you past, showing the CP315 configuration, shows that it is to be connected to AS512 using 3964R protocol

. RK 512 is not mentionned.

This is similar to what is found in this document:

SINUMERIK 840/840C 880 - Industry Support Siemens

https://support.industry.siemens.com/cs/attachments/22090274/447_840_840C_880_Computer_Link_General_Description.pdf

Hope this helps,

Daniel Chartier