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M-90 T connection issue

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I have two old units but i haven't got original cable. I dont know if they work good so i tried to connect to them with my pl2303 rs232 to USB converter and an rj11 cable. Tried it on Windows 8.1 64bit and Windows 7 64bit. Evertime it say that it can't synchronise with PLC. I use proper COM and got good drivers and good settings. 

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I have used several   Prolific USB serial Converters over the years  with Win XP,  and 7

And when I tried to use them on Win 8 they did not work, even with the updated files from Prolific.

Seems there was a flaw in the chip, and also knock-offs of the chip. 

The WIN 8 drivers won't work with the older versions.


Ended up getting a newer USB cable with WIN 8 drivers included.


Chances are , that is your problem. -- Get a new USB serial converter with drivers for Win 8.

  STAR   has one that I use.





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