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I'm new to the MODBUS world and am trying to test various installation scenarios for a touchscreen fan speed control system my company is developing. In this case, the system works properly when I run a 2 foot twisted pair length from a cat5 cable. But when I connect an 800 foot spool, I get no control. DC Voltage still reads adequate on the distal end, but apparently the digital signal is getting lost in the mix. Could it be just signal noise from all of the cable being coiled up in a box?
Any insight is much appreciated, Thanks!
Any insight is much appreciated, Thanks!