micah123
Guest
M
You guys were a lot of help last time, thought I'd try another problem on you. My company is putting in a new mixer (rubber) and are putting in a measuring and weighing system to feed it. My task is to connect a plc to the weighing conveyor load cells and then determine proper amounts for each item to put into the batch. I have a SLC-503 and a MV/thermocouple card (on my desk). I connected a load cell simulator to the first input and used 3 resistors to give me 30mv at 15 volt excitation on the second input. Then calculated the weight in the logic. This seems to work pretty good and the load cell simulator switched to different positions is within 2/10ths of a pound all the way up to full scale (1000lb). I even varied the excitation from 2 volts to 15 volts and the calculated weights were still within 2/10ths of a pound. What I want to know from you guys is has this been done by any of you, if so how did it work in the field, also I haven't purchased this stuff yet. The SLC503 may be the same one that runs the mixer or it may be stand alone, If stand alone I may use a micrologix 1200 and a TC/MV card with it. I've done this using a regular weigh scale years ago but we lost some accuracy by converting the weigh scale to analog and into the plc. What about a weigh scale card for the SLC-503? Anybody make one?
Load cells 2mv/volt @ 1000lb.
Load cells 2mv/volt @ 1000lb.