Can two emulators of AC800F controller running on different PCs on LAN communicate through TCP/iP send/recv blocks

Emulator1 and Emulator2 are running on different Computers .one computer has Combivis . from this both emulators can be commissioned and downloaded. In HMI both emulators variables can be monitored. But when I send one variable from one emulator to other emulator using SR-SRTCP interface and coressponding send receive blocks in corresponding emulators, the variable is not received. The receiving block times out continuously and send block shows nothing sent. why it's happening so.? Is there a solution to this .kindly help and oblige.

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whisper_here Rank: 348

Asked 4 years ago

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hi,

What is IP address of emulator on both the computer is it localhost/127.0.0.1 or computer physical address ? if it's 127.0.0.1 it's not possible to comunicate via ethernet send and recieve. because to send/recieve unique IP address is required to identify source/destination while communicating. hence use computer physical IP address.

Also check first both computer physical IP address can ping each other. i.e both computers are in same network !

Also not sure if that impacts but switch off firewall if switched on.

Check this link for more info on running emulator on physical IP address @ http://www402.abbext.com/AC-800F-Emulator-q623613.aspx#commentsList624930

Reply back if not resolved.

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by whisper_here Rank: 348 on 4/28/2014 9:49:07 AM | Like (0) | Report

Yes surely both emulators are running on different computers with different local IP address and same subnet mask. Both computers can ping each other. From engineering station both emulators can be commissioned and corresponding program's can be downloaded. On HMI their variables can be monitored. But send receive blocks are not working properly as I mentioned in question.

by Sumit Gargav AKS expert

Rank: 3 on 4/28/2014 6:55:13 PM | Like (0) | Report

Hi, Can you attach screen-shot of SRTCP block parameter mask on both the emulator. USEND and URECV block parameter mask and the error code you are getting on usend and urecv block.
OR if your projects are not bulky just attach both the emulator .csv file will easy to analyse.
Usually if you are in network then there is only problem of configuration.

by whisper_here Rank: 348 on 4/30/2014 8:34:44 PM | Like (0) | Report

I got the solution. Both computers were not time synched. After time synchronisation of the computers data communication by send receive blocks started. However problem arises again if I just download the emulators again or make any changes in program and download again. This problem is solved by using a new /unused TCP/IP port number before downloading. However another finding is that by restarting both the computers the already used port number start working properly. But again once used a port number does not work for the next download. Can u please explain this behaviour , is it right one . Or something is to change. Regards

by Sumit Gargav AKS expert

Rank: 3 on 5/6/2014 7:05:22 AM | Like (0) | Report

not sure timesynch was the isuue because ethernet SR executes on each task cycle independent of timestamp. but good to know if problem resolved.
Try restarting "Freelance Controller Emulator services" from services after download if that works. could be possible as physical controller is having dedicated ports where as emulator is using computers ports which are occupied already. WBr.

by whisper_here Rank: 348 on 5/9/2014 8:40:12 AM | Like (0) | Report

I think so in case of emulator the operating system may not have released port before we test it again. However I checked on real controller with the same procedure , it worked fine,no problem occurred with the same port no each time. Thanks a lot for your keen interest and help.
One more thing I wanna know how many variables can I communicate between two controllers and does this communication disturbs or overloads the normal operation of controller.

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