![]() Interesting comments from Duris: electrical meters providing 'bad values'. I can't answer your other questions because I've never even seen an RS416, just other serial servers. However, if you are getting bad values from a given hardware field device and you move that hardware device from one serial server to another and the bad values move to the 2nd serial server, then the field device is generating bad values. How do you "manipulate/move serial ports"?ĭo you connect a different field device to an unused serial hardware port?ĭo you assign a different virtual serial port number to a physical hardware serial port? >2) by try and error I've found that the distortion can be avoided by manipulation of specific serial devices - the problem migrated to another RS416 after I transferred a specific serial port to it.īecause I don't know what you mean by 'transfer a specific serial port'. I don't understand thd 2nd part of your troubleshooting: Whatever is the alternative master/client is some how misinterpreting the data format.Ģ. Sounds like master/client fails to interpret data properly - not serial server problem - because a substitute master/client (Modscan) gets good data assuming Modscan talks through the RS416 serial server. >1) if during this distortion someone connects to the same RS416 and polls the same devices with Modscan utility, the values arrive correct. I would appreciate any assistance, and thank everyone in advance.ġ. 2) by try and error I've found that the distortion can be avoided by manipulation of specific serial devices - the problem migrated to another RS416 after I transferred a specific serial port to it.ġ) Is it possible that some RTU device or several RTUs connected to a single port can cause RS416 send incorrect responses to PI Server from ALL ports?Ģ) How can I know if RS416 is overloaded?ģ) Is there any way to schedule automatic serial port reset for RS416? Here's the twists: 1) if during this distortion someone connects to the same RS416 and polls the same devices with Modscan utility, the values arrive correct. In some cases this distortion passes by itself after half an hour or a couple of hours, but in other cases it can hold for days and the only way to clear it is to disconnect the TCP port or restart PI Service. Time to time (can be hours or days), all the values received from a specific RS416 lose their "connection to reality", for example instead of around 400Volts I get 100 or 7000, instead of 50Deg temp I get 2000 or -500 etc. Since various systems are involved, I cannot point out which one is causing it. Lately I've been facing the following problem with several RS416s. Each RTU is requested to transmit several values like voltage, current, PT100 values, statuses, about once in 1-2 min. RS416's are connected by fiber optics to PI Server PC, and each of them has 8 or 12 or 16 serial ports with up to 25 devices on each port. I've been using about a dozen of RuggedCom RS416's for the last decade to read electrical values from numerous "Modbus RTU-speaking" devices.
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