User`s guide

Function Blocks
Function Block Categories and Types
78 UMC800 Control Builder User’s Guide Release E
1/01
Signal selectors category
Table 24 lists the function block types in the Signal Selectors category.
Table 24 Signal selectors category function block types
Block Type Description Graphic Form
HSEL High Selector - Selects the higher of two analog inputs (X or
Y) for output.
LSEL
Low Selector - Selects the lower of two analog inputs (X or
Y) for output.
SW Switch - Selects input Y for output when digital input signal
(SY) is ON.
RSW Rotary Switch - A Single output can be selected from up to 8
analog inputs based on the analog value (1 - 8) applied to the
selected input.
XFR
Transfer Switch - Provides “bumpless” switching between
two analog input values (X and Y) that is triggered by a digital
input signal (SY).
When switched, the output ramps to new value at a specified
rate. A rate is available for each status of the digital input.