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Function block diagram language (FBD / Grafcet SFC / Logic functions)
(1)
Definition
FBD language allows graphical programming based on the use of predefined function blocks; it provides the use of:
32 pre-programmed functions for counting, time delay, timing, definition of switching threshold, (for example: temperature regulation),
generation of impulses, time programming, multiplexing, display,
7 SFC functions,
6 logic functions.
b
b
b
Pre-programmed functions
Zelio Logic smart relays provide a high processing capacity, up to 200 function blocks, including 32 pre-programmed functions:
TIMER AC
TIMER BH
TIMER Li
TIMER BW
Timer. Function A/C
(ON-delay and OFF-delay)
Timer. Function BH.
(adjustable pulsed signal)
Pulse generator
(ON-delay, OFF-delay)
Timer. Function BW
(pulse on rising/falling edge)
Timer. Function A/C with
external preset adjustment
(ON-delay and OFF-delay)
Timer. Function BH with
external preset adjustment
(adjustable pulsed signal)
Pulse generator with
external preset adjustment
(ON-delay, OFF-delay)
BISTABLE
SET- RESET
BOOLEAN
CAM
PRESET COUNT
Impulse relay function
Bistable latching
- Priority assigned either to
SET or RESET function
Allows logic equations to be
created between connected
inputs
Cam programmer
Up/down counter
UP DOWN COUNT
PRESET H-METER
TIME PROG
GAIN
TRIGGER
Up/down counter
with external preset
Hour counter
(hour, minute preset)
Time programmer,
weekly and annual.
Allows conversion of an
analogue value by
change of scale and offset.
Defines an activation zone
with hysteresis
MUX
COMP IN ZONE
ADD/SUB
MUL/DIV
TEXT
Multiplexing functions
on 2 analogue values
Zone comparison
(Min.
y
Value
y
Max.)
Add and/or subtract function Multiply and/or divide function Display of 4 pieces of data:
digital, analogue, date,
time, messages for
Human-Machine interface.
DISPLAY
COM
COMPARE
STATUS
ARCHIVE
Display of digital and analogue
data, date, time, messages for
Human-Machine interface.
Sending of messages
with communication interface
(see page 48)
Comparison of 2 analogue
values using the operands
=, >, <,
y
,
u
.
Access to smart relay status Storage of 2 values
simultaneously
SPEED COUNT
CAN
CNA
SL In
SL Out
Fast counting up to 1 kHz
Analog/digital converter
Digital/analog converter
Input of a word via serial link Output of a word
via serial link
SFC functions
(2)
(GRAFCET)
RESET-INIT
INIT STEP
STEP
DIV-OR 2
CONV-OR 2
Reinitialisable step
Initial step
SFC step
Divergence to OR
Convergence to OR
DIV-AND 2
CONV-AND 2
Divergence to AND
Convergence to AND
Logic functions
AND
OR
NAND
NOR
XOR
NOT
AND function
OR function
NOTAND function
NOT OR function
Exclusive OR function NOT function
(1) Function Block Diagram
(2) Sequential Function Chart.
Presentation :
pages 6 to 9
Characteristics :
pages 14 to 19
Curves :
pages 20 and 21
References :
pages 22 to 27
Dimensions, schemes :
pages 28 to 31
Functions
(continued)
1
Zelio Logic smart relays
1
Compact and modular smart relays
“Zelio Soft 2” programming software
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