Sicam with WinCC for Time Syncronization

Hi,

Im having the following hardware with me:

1.S7 400 414 CPU.
2.Time Syncronization Module 6MD1 010 0BA00 0AA0.
3.CP 443-1.
4.DI Module for SICAM 6MD1 021 0AA00.

My Aim is to:

Time Syncronization with the 414 CPU and the WINCC Alarm Generation.

My previous actions:

I haveconfigured the above hardwares in Simatic manager and in WinCC i have defined an external tag I 0.0 which is in the Sicam DI Module.

I have made the PLC time and the Computer time as different.

I Created an alarm in WinCC based upon the I0.0 as tag.

But the alarm is generated based upon the Computer time only and not based on the PLC time.

How can i achieve it? What is the required settings to be made at Step 7 and the WinCCExplorer Time Syncronization.

Till now i have not done any coding for the SICAM module or im not aware of them.

Please help me.

Thanks in advance

Hi,

If you use the Sicam Modules for get the messages (events and alarms) from PLC, you don't use the Message System of Simatic TIA, because you will lose the precision of 1ms of the modules..

The Input modules of Sicam, put the timestamp of the change state in a buffer of module. This buffer should be read in OB40. See the manuals of Sicam RTU/eRTU.

Well, and what you do to send the messages to WinCC?

Two Solutions:
1. You use some library sold by Siemens. See the pdf in attachement.
2. You create an program in the PLC to create a secondary buffer to storage the buffer of all modules, and send this buffer to WinCC via B_SEND.
In the WinCC you create a Raw Tag to receive this buffer and create an script to analyze this tag. This script should analyze the change of messages (received by Raw Tag)and using API of WinCC setting the status and the timestamp of messages.

In the second case, you should know theAPI of Sicam for reading and mounting the buffer in the PLC, you should know theB_SEND block for sending the buffer to WinCC, and mainly, you should know the API of WinCC (C-Functions as well )to analyze and setting the messages of Alarm Logging, theses functions are:
- MSRTStartMsgService;
- MSRTCreateMsg;
- MSRTStopMsgService.
This caseis much more complicated, but in 2000/2001 the Siemens don't provides the librarys, and we developed our libraries, in PLC and in WinCC, and this is basically the way as the libraries of Siemens work, but we used ours until today.
In our casethe situationis more complicated, because our projects are always executed in redundant servers.Is verycomplicated to maintain the synchronism of the buffers for the two servers.

Ohhh,

Is possible send the messages from PLC to WinCC in the format ofNRMS7PMC.
But I never made this.