New Controls Guy
Member
The input card (NI-4) has a range of 3277 to 16384 I believe. I found that someone had sub 3277 from the source value and had 0 for the offset. The scaled range of the device is 0-300, and the offset should be -75 I believe. The rate is 229.
In other places in the logic, they also sub 3277 from the source value, (which is the same word used in the above question) but left an offset value in the scl command. However the offset value in the command isn't what I thought it should be. Here's what they have:
Attached are pics from the logic. The logic is scaling the outlet temperature, using a rosemount device (4-20ma, -50 to 730F range)
I believe the rate should be 595, but they have 601. I believe the offset should be -245, however the offset in the logic is -50.
What am I missing?
Thanks in advance..
Newbie
In other places in the logic, they also sub 3277 from the source value, (which is the same word used in the above question) but left an offset value in the scl command. However the offset value in the command isn't what I thought it should be. Here's what they have:
Attached are pics from the logic. The logic is scaling the outlet temperature, using a rosemount device (4-20ma, -50 to 730F range)
I believe the rate should be 595, but they have 601. I believe the offset should be -245, however the offset in the logic is -50.
What am I missing?
Thanks in advance..
Newbie