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Operands
For
WX
s
-
d
Error flags
No.
IEC address
%MX0.900.11
R900B
%MX0.900.9
R9009
In this example the function has been programmed in ladder diagram (LD) and structured text
Example
(ST).The same POU header is used for all programming languages.
POU header
All input and output variables used for programming this function have been declared in the POU
header.
Body
When the variable start is set to TRUE, the function is carried out.
LD
ST
IF
start
THEN
F20_ADD(value_in, value_in_out);
END_IF;
Relay
T/C
WY
WR
WL
SV
WY
WR
WL
SV
Set
for an instant
for an instant
Register
EV
DT
LD
FL
EV
DT
LD
FL
If
the calculated result is 0.
the result exceeds the range of 16-bit
data (overflow or underflow).
Arithmetic instructions
Constant
dec. or hex.
-
343
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