User`s guide

Function Blocks
Function Block Categories and Types
Release E UMC800 Control Builder User’s Guide 67
1/01
Block Type Description Graphic Form
LTCH Latch - Turns a logic output ON when latch input (L) turns
ON and unlatch input is OFF. Output turns OFF when unlatch
input (U) turns ON.
TGFF Toggle Flip Flop - Provides an ON state output when a
digital input goes from OFF to ON and the previous state of
the output was OFF, and an OFF state output when the digital
input goes from OFF to ON and the previous state of the
output was ON.
RESET input when ON sets output to OFF.
BOOL Freeform Logic - Reads digital inputs and calculates the
output based on a specified Boolean logic function, such as:
AND, OR, NOT, or XOR
PB
Push-button - Provides the interface from the operator
interface to the logic functions of the controller.
Provides a one-shot output based on an OFF to ON change
of an operator interface F1 to F4 key action. Supports four
pushbuttons per block.
Up to 4 screens (16 digital signals) may be configured,
assigned to any screen access key.
FSS
Four Selector Switch - Provides 16 digital outputs in groups
of four. A dedicated display allows activating of only one
output per group while other outputs in the group are turned
off simulating 2, 3, or 4 position selector switches.
Up to 4 screens (4x16 digital signals) may be configured and
assigned to any screen.