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Forum: Troubleshooting Mon 17 January 2011, 06:49
Replies: 35
Views: 44,270
Posted By bradm
Picking up on what Gerald mentions, while RS485...

Picking up on what Gerald mentions, while RS485 may be hard to get working, setting up a quick Optoisolated circuit with a PWM driven Resistor/Capacitor to act as the remote potentiometer is quick...
Forum: Troubleshooting Sat 15 January 2011, 22:41
Replies: 35
Views: 44,270
Posted By bradm
Ross - okay, good that the grounds are actually...

Ross - okay, good that the grounds are actually isolated. I thought I'd recollected I'd seen them tied together at some point. I agree, no need for less than 9600 bps.

Good luck!
Forum: Troubleshooting Sat 15 January 2011, 20:41
Replies: 35
Views: 44,270
Posted By bradm
Ross, do a quick resistance test with a...

Ross, do a quick resistance test with a multimeter, and I think you'll find that all the grounds on that VFD are connected together.

You've been doing a lot of work to try to make the...
Forum: Troubleshooting Wed 22 December 2010, 15:36
Replies: 35
Views: 44,270
Posted By bradm
Chris, interchangeable, no. Convertible, yes. ...

Chris, interchangeable, no. Convertible, yes. Google "RS422 vs RS485" and you'll find info like this (http://www.rs485.com/pfaq.html) that helps to clarify. Both standards only cover the actual...
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