tag:blogger.com,1999:blog-35259639.post4483555301326173387..comments2023-04-11T04:53:39.245-05:00Comments on Lynn's Industrial Protocols over IP: How Exposed in Public Cellular IPLynn August Linsehttp://www.blogger.com/profile/01534730541144544922noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-35259639.post-4907798538392363092008-02-12T13:21:00.000-06:002008-02-12T13:21:00.000-06:00Hi there Lynn Expanding this topic a ...Hi there Lynn<BR/> Expanding this topic a little....have you worked with SCADA over broadband satellite ? We are looking at connecting a remote station with a commercial broadband consumer type connection service ( monthly fee for a certain amount of speed and data throughput ). A topic on protocols over satellite would be great. We're looking at UHF radio modems using DF1-RM to a satellite hub and then out to the HMI. Perhaps I should start a new thread as this could be of interest to others.Anonymoushttps://www.blogger.com/profile/12699731051273143613noreply@blogger.comtag:blogger.com,1999:blog-35259639.post-76017084876037000632008-02-12T13:13:00.000-06:002008-02-12T13:13:00.000-06:00Hi there Lynn Expanding this topic a ...Hi there Lynn<BR/> Expanding this topic a little....have you worked with SCADA over broadband satellite ? We are looking at connecting a remote station with a commercial broadband consumer type connection service ( monthly fee for a certain amount of speed and data throughput ). A topic on protocols over satellite would be great. We're looking at UHF radio modems using DF1-RM to a satellite hub and then out to the HMI. Perhaps I should start a new thread as this could be of interest to others.Anonymoushttps://www.blogger.com/profile/12699731051273143613noreply@blogger.comtag:blogger.com,1999:blog-35259639.post-81921659701618157762008-01-23T08:56:00.000-06:002008-01-23T08:56:00.000-06:00You need to discover who "breaks" the connection.I...You need to discover who "breaks" the connection.<BR/><BR/>If it is the "serial tunnel" pieces, then there's some incorrect setting. I would think the tunnel could stay up forever, but you need to have at least a 4+ minute TCP keepalive set. One problem I'd forsee - if the originator of the serial tunnel won't wait 5-10 seconds at least, then it likely aborts the tunnel before it can realistically open.<BR/><BR/>If the tunnel drops due to host/protocol timout, then you may not be able to do this ever. Best bet is to try using any dialup/radio modem mode it might have.<BR/><BR/>For example, a Siemens PPI protocol demands an (ACK) in a few milliseconds, which cannot work across cellular, However telling the host you're using radio modems relaxes this demand.Lynn August Linsehttps://www.blogger.com/profile/01534730541144544922noreply@blogger.comtag:blogger.com,1999:blog-35259639.post-53296401700291759162008-01-22T17:40:00.000-06:002008-01-22T17:40:00.000-06:00Hi Lynn. i am trying to sent data between SCADA sy...Hi Lynn. i am trying to sent data between SCADA system Bailey Infi90 (INIIR-01 serial RS232 gateways) using serial servers in "Serial Tunneling" Configuration with ESR902 devices over WAN, but the link is broken a few seconds later. I hope you can help me with the configuration that I must use.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-35259639.post-57698610890545857122007-10-16T14:34:00.000-05:002007-10-16T14:34:00.000-05:00Hey, I just located your Blog through some Google ...Hey, I just located your Blog through some Google searching (curiously enough, while searching for info on Modicon PLC TCP/IP communication issues), and must say that you have written some fascinating articles. <BR/><BR/>I'm going to forward your link to my SCADA/Controls colleagues and will be sure to visit in the future for more updates!Chrishttps://www.blogger.com/profile/10975950669121360383noreply@blogger.com