Vidmas30 Posted November 7, 2010 Report Share Posted November 7, 2010 Good evening, Our customer wants PLC to count impulses of four machines, and to have results (count per minute) in PC (Excel). So I think cheapest solution would be Jazz connected via serial cable to PC DDE server. I want to ask what max length of serial connection cable can be used? Thank you! Quote Link to comment Share on other sites More sharing options...
Damian Posted November 8, 2010 Report Share Posted November 8, 2010 Good evening, Our customer wants PLC to count impulses of four machines, and to have results (count per minute) in PC (Excel). So I think cheapest solution would be Jazz connected via serial cable to PC DDE server. I want to ask what max length of serial connection cable can be used? Thank you! As a general rule of thumb, RS232 is not recommended over 50 feet. Quote Link to comment Share on other sites More sharing options...
Phil Salkie Posted November 8, 2010 Report Share Posted November 8, 2010 If you can live with a slower data transfer rate, you can increase the distance. Assuming you only need to collect results once or twice a minute, you could set a rate of 1200 baud, and run your RS-232 signal a few thousand feet without any problems. Alternately, you could put a $60 RS-232 <-> RS422 converter at the PC end, switch the DIP switches to RS-422, and run your data half a mile at 9600 baud. Quote Link to comment Share on other sites More sharing options...
Vidmas30 Posted November 8, 2010 Author Report Share Posted November 8, 2010 Thank you!!! Quote Link to comment Share on other sites More sharing options...
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