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α
2 Simple Application Controllers
FB Name
PWM
[PWM]
PID
Retentive
Alternate
[RAL]
Addition
[ADD]
Subtraction
[SUB]
Multiplication
[MUL]
Division
[DIV]
Calculation
[CAL]
Shift
[SFT]
SMS
[SMS]
FB Symbol
The Pulse Width Modulation Function Block
changes the output status according to a
0 0
0
set period of time with a minimum of 100ms
I
P
O
a n d a m a x i m u m o f 3 2 7 6 7 0 0 m s i n
increments of 100ms. The percentage duty
P
W
M
for the function controls the amount of
elapsed time before the output status is
changed.
T h e P I D F u n c t i o n B l o c k i s t h e
implementation of PID, a control method
E
0 0
0
used to obtain stable control over a system
A
P
O
variable. It is a equipped with an Auto-
C
tuning function, which automatically adjusts
P
I
D
the Function Block parameters for the
specific application.
The Alternate Function Block is used to
reverse the ON and OFF state of the output
as and when the input pin receives a signal.
0 0
0
The output will be set ON when the input
I
O
pin goes high and remain ON until the input
C
receives the second rising edge. When the
R
A
L
power is turned OFF the function block will
use the last alternation operation to control
the output.
0 0
0
I
P
O
T h e A D D F u n c t i o n B l o ck i s u s e d t o
summate two input values
A
D
D
0 0
0
I
P
O
The SUB Function Block is used to subtract
two input values.
S
U
B
0 0
0
I
P
O
The MUL Function Block is used to multiply
two input values.
M
U
L
0 0
0
I
P
O
The DIV Function Block is used to divide
two input values.
D
I
V
0 0
0
The CAL Function Block is used to perform
I
P
O
a calculation from the combination of
different Arithmetic function blocks.
C
A
L
This Shift Function Block is used to transfer
I
0 0
0
the Shift Input status just before the Input
T
O
signal is set ON. It has a bit input pin, a shift
S
input pin, a set input pin, a reset input pin
S
F
T
R
and a bit output pin.
0 0
0
The GSM SMS Function Block sends the
I
P
O
LCD screen as a SMS message to either a
mobile phone handset or an E-mail account
S
M
S
for remote maintenance purposes.
Description of Function Block
Appendix 8
Memory
Section
Use
16 Byte
6.21
α
2
52 Byte
6.22
13 Byte
6.23
20 Byte
6.24
20 Byte
6.25
20 Byte
6.26
20 Byte
6.27
*3
6.28
19 Byte
6.29
*6
6.30
8 - 6
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