User`s guide

Function Blocks
Function Block Categories and Types
Release E UMC800 Control Builder User’s Guide 79
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Auxiliary category
Table 25 lists the function block types in the Auxiliary category.
Table 25 Auxiliary category function block types
Block Type Description Graphic Form
FGEN
Function Generator - 10 segment - Generates output
characteristic curve based on up to 11 configurable
“breakpoints” for both input and output values.
LDLG Lead Lag - Modifies an analog input value to include Lead
(T2) and Lag (T1) time constants from 0 to 99 minutes when
a digital input (EN) is ON.
HLLM High Low Limiter - Provides High-Low limit for an analog
value. Turns ON high or low logic output if input exceeds or
falls below set limits.
VLIM Velocity (Rate) Limiter - Limits the rate at which an analog
input value can change when a digital input signal (EN) is ON.
Provides independent increasing and decreasing rate of
change limit values. Logic output indicates increasing or
decreasing rate is active.
ROC Rate of Change - Provides:
• an analog output representing units per minute change of
the analog input,
• compare setpoints for high and low rate of change,
• compare selections for increasing, decreasing or both
directions of change,
• a logic 1 (ON) output when input rate exceeds high rate
setpoint,
• a logic 1 (ON) output when input rate is less than the low
rate setpoint.
RCON Read Configuration Parameter Data - Reads the numerical
value of selected configuration parameter in a given function
block using the index number of the parameter.
WCON
Write Configuration Parameter Data - Writes the numerical
value of selected configuration parameter to a given function
block.