I know this is going to sound a basic to some of you Wizards but....
I am building a large hydraulic press. The central ram had a 4-20ms stroke position sensor built in and I have connected that to a 24v dc Siemens Logo8 PLC. As the ram moved I can display its position on a screen.That was the easy bit.
Next I want to set a digital limit for the ram travel using a 10 turn, 200 K potentiometer.
The PLC has both 0-10v and 4-20ma inputs available, either could be used to provide a suitable human adjustable input.
However my first attempt at building a simple voltage divider didn't go well, the resistor changed colour , the wires melted and all the smoke leaked out of the circuit. I have trawled through all the topics on this forum, but can't find quite the right answer.
Any help and a simple diagram would be much appreciated.
Thank you
I am building a large hydraulic press. The central ram had a 4-20ms stroke position sensor built in and I have connected that to a 24v dc Siemens Logo8 PLC. As the ram moved I can display its position on a screen.That was the easy bit.
Next I want to set a digital limit for the ram travel using a 10 turn, 200 K potentiometer.
The PLC has both 0-10v and 4-20ma inputs available, either could be used to provide a suitable human adjustable input.
However my first attempt at building a simple voltage divider didn't go well, the resistor changed colour , the wires melted and all the smoke leaked out of the circuit. I have trawled through all the topics on this forum, but can't find quite the right answer.
Any help and a simple diagram would be much appreciated.
Thank you