Micromod MOD: 30ML Operation and Template Setup - Manual (Page 44)

MOD 30ML Multiloop Controller
OPERATION
3-12
3.9.3 Single Loop Automatic Operation with Ratio and Bias
A set-point bumpless transfer is possible when AUTO RAT (ratio) or AUTO BIA (Bias) is
configured. These configurations calculate a ratio or bias value that balances the remote set-
point with the local set-point upon a switch from local to remote set-point.
Using Auto Bias, a switch from local to remote set-point will cause the bias value to
automatically adjust to the difference between the active set-point and the remote
set-point times the ratio value. For example, if the active set-point is 17.00 and the
remote set-point is 20.00 with a ratio of 2.00, then the auto bias value will be:
-23.00 = 17-(20*2).
Using Auto Ratio, a switch from local to remote set-point will cause the ratio value to
automatically adjust to the ratio between the active set-point minus bias and the
remote set-point. For example, if the active set-point is 17.00 and the remote set-
point is 20.00 with a bias of -23.00, then the auto ratio value will be:
2 = 17- (-23.00)/20.
From the Auto, Local, Bias display, press the R/L key to
switch from local to remote set-point (REM).
Bias value automatically adjusts to balance remote and
local set-points.
Press the
∆ or ∇ key to adjust the bias value and change
the active remote set-point by the bias value.
Press the scroll key until appears SP to view the new
set-point.
The same idea applies to use of ratio.