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| 3/6/2024 2:39 PM | |
Joined: 12/2/2011 Last visit: 10/24/2024 Posts: 4 Rating:
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Hi, The costumer at site experience a lot of communicationproblems with some slaves at 3 different profibus networks/subnet. Our guess is disturbances at site because the 3 profibusnetwork is to 3 different AS/CPU. They run all subnet at the speed 1,5 Mbps. We are about to test to slow down this speed to 500Kbps. First I tested to change a subnet called FilterOP in HW and downloaded and it worked out nice. This AS/CPU has no extra modules installed as more Profibus masters etc Then we will test another AS/CPU which has several more modules installed like 2 more profibus master modules. When I change Baudrate to 500 Kbps for the profibus subnet (PROFIBUS(1)) which is connected to the AS/CPU Master built in DP-master and downloaded, we loose all connection to all slaves on that subnet. When I then go back to 1,5 Mbps evertything is ok again. What can the problem be? I thought about if some slave was set up as fixed 1,5 Mbps and not autoconnect speed from master, but then not all slaves should be lost. See attached doc Urban
AttachmentProfibusproblem.pdf (348 Downloads) |
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