When setting the fields in the Timer Tag parameter,
you must set the timer preset value, PRE, in milliseconds. When the
value of the timer accumulated value field, ACC, equals the preset
value, the block sets the DN bit to 1 for the
TON and RTO blocks and 0 for the
TOF block.
Before you set the timer preset values:
Load the built-in timer data types by using the
plcloadtypes function. At the MATLAB® command line,
enter:
Open the ladder diagram block library. At the MATLAB command line, enter:
Select a PLC Controller Suite block and add it to your
model. Navigate to the ladder diagram program by double-clicking PLC Controller Suite > Task > Program. Alternatively, you can:
Add a JSR (RTN) Subroutine block and navigate
to the ladder diagram program block by double-clicking JSR (RTN) Subroutine
> Routine Logic.
Add a Function Block (AOI) block and navigate
to the ladder diagram program block by double-clicking Function Block (AOI) >
Logic Routine.
Add a TON, TOF, or RTO block
to the ladder diagram program. Double-click the TON,
TOF, or RTO block and enter a name. For
example, name your block as T1.
When you add a TON, TOF, or
RTO block, Simulink®
PLC Coder™ creates the associated timer structure and names your
structure as TimerName_InitialValue. For example, if your
timer block name is T1, the structure name is
T1_InitialValue.
To set the timer preset values you can:
Assign the timer preset values at the MATLAB command line. For example, if your block names are
T1, T2, and T3,
at the MATLAB command line,
enter:
Use a MATLAB script that executes when the model loads. For example, if
your block names are T1, T2, and
T3, in the InitFcn model callback
property, enter:
Set the timer preset values by using a MATLAB script file. You must first create a script file and then call
the script file in the LoadFcn model callback. For
example, create a script file called mytimerpresets. In
this script file, enter:
To programmaticaly assign the mytimerpresets script
file to the LoadFcn callback, at the MATLAB command line,
enter:
