Vidmas30 Posted May 31, 2017 Report Share Posted May 31, 2017 Good day, We have Scada software where data from PLC's is taken by Unitronics PCOM prtocol. When PLC's are on LAN or connected via serial - everything is fine. Is it possible to collect data with GPRS modem (SIM card with static IP address) using it as TCP serial converter? It works when we use it as Modbus TCP to serial cobverter (but our SCADA software don't support). Can't get to work it with PCOM (transparrent TCP to serial coverter).. Any suggestion (maybe I need to do some special settings on modem) would be appreciated. Modem is GENEKO GWR202. Thank you. Quote Link to comment Share on other sites More sharing options...
MVP 2021 Joe Tauser Posted June 12, 2017 MVP 2021 Report Share Posted June 12, 2017 Yes, it is possible. The modems are supposedly transparent to communication. You'll need to turn your TCP packet timeout up (SI 101) to something longer than the modem time lag. Otherwise the PLC closes the socket on you without much explanation. The Help says this value maxes out at 10 (1 sec) but we have pushed it to 50 and it still works. Joe T. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.