thierry2003
Member
- Join Date
- Oct 2003
- Posts
- 70
Hi all.
I am reprogramming some machinery that has a weigh-hopper built into it. I just haven't got a clue how I must use the analog value from the loadcell transmitter.
On my analog input card (plc) I can set offset and gain, on the loadcell-transmitter there are some dipswitches to set the span.
In the current setup one can set the offset and change the span on the touchscreen. What is the use of all this stuff?
I thought I just had to do the following...
Put 0 kg in the hopper and set the offset of my AD converter to 0.
Put the maximum possible weight into the hopper (let's say 500 kg) and set the gain of the AD converter to the maximum (4000 in my case).
So 0 kg give's a digital value of 0, and 500 kg a value of 4000.
And that's it, I THINK!
I am probably wrong so if anyone can help me...
I am reprogramming some machinery that has a weigh-hopper built into it. I just haven't got a clue how I must use the analog value from the loadcell transmitter.
On my analog input card (plc) I can set offset and gain, on the loadcell-transmitter there are some dipswitches to set the span.
In the current setup one can set the offset and change the span on the touchscreen. What is the use of all this stuff?
I thought I just had to do the following...
Put 0 kg in the hopper and set the offset of my AD converter to 0.
Put the maximum possible weight into the hopper (let's say 500 kg) and set the gain of the AD converter to the maximum (4000 in my case).
So 0 kg give's a digital value of 0, and 500 kg a value of 4000.
And that's it, I THINK!
I am probably wrong so if anyone can help me...