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2 Simple Application Controllers
FB Name
Time
Switch
[TS]
Time
Switch m
[TSm]
Counter
[CN]
U/D
Counter
[UD]
Compare
[CP]
Analog
Output
Offset
Gain
[OG]
Display
[DP]
Zone
Compare
[ZC]
FB Symbol
Description of Function Block
0 0
0
The Time Switch Function Block uses a
P
O
predefined time schedule to control the ON
and OFF status of the output.
T
S
The Time Switch maintenance Function
0 0
0
Block uses a predefined time schedule to
P
control the ON and OFF status of the
output. The function block can be setup
T m
S
from the TopMenu "Parameter" via the front
panel keys.
The Counter Function Block increments the
0 0
0
current value by one as and when the input
I
P
O
pin receives a signal. When the current
C
value reaches the set value the output is set
C
N
ON. The counter current value is reset as
and when the clear pin receives an input.
The Up/Down Function block positively or
U
0 0
0
negatively increments the counter until a
set value is reached thereby setting the
D
P
O
output ON. A preset signal can also equal
C
U
D
the set value regardless of the current value
P
for the function block and thereby setting
the output ON.
The Compare Function Block monitors the
0 0
0
current value of the input pin in relation to a
I
P
O
preset expression. The expression consists
of =,>,>=,<,<= or <>. If the compared value
C
P
satisfies the expression subsequently the
output pin is set on.
0 0
0
The Analog Output function takes a digital
M
P
value input and delivers a corresponding
E
analog voltage or current to a selected
A
O
channel on the AL2-2DA module.
0 0
0
The Offset Gain Function Block is based
I
P
upon a linear function Y=A/B∗X+C to which
the value obtained from an analog input
O
G
(X:A01-A08) is set.
0 0
0
The Display Function Block is used as an
I
P
interface between the user and the devices
held within the controller. Current values,
timer messages, user-defined messages
D
P
can be read.
T h e Z o n e C o m p a r e F u n c t i o n B l o c k
0 0
0
identifies whether the input value lies within
I
P
O
a specified upper and lower limited zonal
area and if so changes the status of the
Z
C
output accordingly.
Function Blocks 6
Memory
Section
Use
*2
6.10
*2
6.10
16 Byte
6.11
22 Byte
6.12
17 Byte
6.13
17 Byte
6.14
22Byte
6.15
*4
6.16
20 Byte
6.17
6 - 2
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