AdvancedHMI Software
General Category => Support Questions => Topic started by: neptun2002 on September 22, 2014, 08:57:11 AM
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Dear Archie I am trying to read tow MODBUS devices one with Station ID=100 the other one with Station ID=101
Connected to Rs485 Bus and connected to the PC Via USB to Rs485 Converter to com5
how can I read each device with a different Station ID ??
I tried to add another ModbusRTUCom2 Driver on the same com5 with a different Station ID But always I can read the one connected to ModbusRTUCom1
it seems like the com is open and not closed after the reading / writing so the second device never get any packet is there any thing wrong that I did ??
what is your suggestion to solve this ?
Thank you so much
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You are doing the right thing, but I never tested the driver in this scenario. I will have to try it to see if there is a bug that needs fixed.
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Hi
Any solution to read two modbus devices on the same com port?
Thanks
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Hi Archie
Any solution to read two modbus devices on the same com port?
Thanks
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Have you tried with the latest version 3.99y Beta ? I think using two drivers pointing to the same COM port that is an RS485 port should work.
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Hi Archie,
I have tested the driver with two devices connected via a usb-Rs485 converter with polling time 100ms and time out 300;
the stable 3.99x version works correctly,
the new version (3.99xbeta4), on the other hand, always generates TimeOut errors on the controls.
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Hi Archie,
I have tested the driver with two devices connected via a usb-Rs485 converter with polling time 100ms and time out 300;
the stable 3.99x version works correctly,
the new version (3.99xbeta4), on the other hand, always generates TimeOut errors on the controls.
This is on the list to be looked into.