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Data types
Data type
BOOL
TIME
BOOL
TIME
In this example, the same POU header is used for all programming languages. For an example
Example
using IL (instruction list), please refer to the online help.
POU header
All input and output variables which are used for programming the function block TP are declared
in the POU header. This also includes the function block (FB) itself. By declaring the FB you create
a copy of the original FB. This copy is saved under copy_name. A separate data area is reserved
for this copy.
Body
If start is set (status = TRUE), the clock is emitted at signal_output until the set_value for the
clock period is reached.
LD
ST
When programming with structured text, enter the following:
copy_name( IN:=
PT:=
Q=>
ET=>
I/O
Function
input IN
clock generated according to clock period at rising edge
input PT
clock period
output Q
signal output
output ET
elapsed time
start
,
set_value
,
signal_output
,
current_value
);
Timer instructions
329
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