Hi All
I am using 2 x analog cards on my rack and they are described as 12bit cards in there title. The manual suggests that the resolution can be programmed per group but i can't seem to find out how to do this. I do select 4 wire (4-20mA) so would that be selecting the resolution behind the scenes, instead of me selecting 9bit,12bit or 14bit somewhere?
Also my understanding is that 12bit represents 4096 14bit is 16384 etc but with Siemens I always seem to put 27648 as upper limit (20mA) to get it to work which i have also done in this case.
My reason for requesting some feedback on this is that i'd like to know the smallest increment i can measure in 2 silos. One is 200000KG max reading and the other is 80000KG.
200000/27684 = 7.22KG (HMI display will be to the nearest 7.22kg)
80000/27684 = 2.89KG (HMI display will be to the nearest 2.89kg)
Is this the correct way to work this out?
thanks for your time
I am using 2 x analog cards on my rack and they are described as 12bit cards in there title. The manual suggests that the resolution can be programmed per group but i can't seem to find out how to do this. I do select 4 wire (4-20mA) so would that be selecting the resolution behind the scenes, instead of me selecting 9bit,12bit or 14bit somewhere?
Also my understanding is that 12bit represents 4096 14bit is 16384 etc but with Siemens I always seem to put 27648 as upper limit (20mA) to get it to work which i have also done in this case.
My reason for requesting some feedback on this is that i'd like to know the smallest increment i can measure in 2 silos. One is 200000KG max reading and the other is 80000KG.
200000/27684 = 7.22KG (HMI display will be to the nearest 7.22kg)
80000/27684 = 2.89KG (HMI display will be to the nearest 2.89kg)
Is this the correct way to work this out?
thanks for your time