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Functions
(
continued)
Software
Unity Pro software
Small/Medium/Large/Extra Large
Programmable process control
Process control in machines
(
continued)
CONT_CTL library functions
(
continued)
Process value processing
AVGMV
Moving average with fixed number of samples (50 max.)
AVGMV_K
Moving average with constant correction factor, 10,000 samples
max.
DEAD_ZONE
Dead zone
LOOKUP_TABLE1
Linearization of characteristic curves using first-order interpolation
SAH
Detection of a rising edge
HYST_XXX
Detection of high threshold with hysteresis
(1)
INDLIM_XXX
Detection of high and low thresholds with hysteresis
(1)
Output value processing
MS
Manual control of an output
MS_DB
Manual control of an output with dead zone
PWM1
Control via pulse width modulation
SERVO
Control for servo motors
SPLRG
Control of two
Split Range
actuators
Setpoint management
RAMP
Ramp generator, with separate ascending and descending ramps
RATIO
Ratio controller
SP_SEL
Selection of setpoint value: local (operator) or
remote
(
processing)
Setting up process control function blocks
Based on the sequencing of function blocks, the FBD language integrated in Unity Pro
is a programming language particularly suitable for building control loops.
Designers can use FBD to easily associate blocks from the CONT_CTL library with
their own DFBs written in Unity Pro’s ST, IL or LD language, or in C language.
Debugging, operation
All Unity Pro’s standard debugging services (see page 6/9) are available. In
particular, the Modicon M340 processor simulator can be used to check correct
execution of processing offline.
Compatibility:
The CONT_CTL control function block library is available in all versions of Unity Pro.
It is compatible with all processors in the Modicon M340, Premium and Quantum
ranges.
Optional specialized libraries
The CONT_CTL control function block library can be supplemented with optional
specialized libraries, to meet specific needs such as predictive control, fuzzy logic
controller, HVAC and mass flow calculation (see page 6/28).
Resources
The technical documentation provides many examples of how to set up programmable
process control function blocks in FBD, LD, IL and ST languages.
The techniques for adjusting process control loops are described in the document
“
Process control, Unity V3.0” available online at
www.schneider-electric.com.
(1)
XXX according to the type of variable: DINT, INT, UINT, UDINT, REAL.
Programming in Unity Pro in offline mode
Programming in online mode
Selection guide:
page 6/2
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