Byte, word, double word
Input or output parameters without symbols.
Integer, double integer
Input or output parameters with symbols.
Real number
It identifies single precision floating point values.
String
This data type is used as a four byte pointer to the string.
Enable bit
Boolean enable bit can be used only for bit.It can be used as
input.
6.18.3 How to set up a subroutine
The following methods can be used to establish a subroutine:
1.Project manager → program block → Right click program block → Insert → subroutine
2.Project manager → program block → SBR - 0 → Right click SBR - 0 → Insert → subroutine
You can use the local variable table to define the parameters of the subroutine.
Notes ：
1.Please remember that each POU in the program has an independent local variable
table.In the A subroutine, you can only use the A local variable table to define
variables.
2.Each subroutine can be set up to 16 IN/OUT parameters.If the number of
parameters is greater than 16, the program will generate errors.
3.You can write a subroutine in the program edit window.
4.Click on the label of POU that you want to edit.SO you can edit the POU in the
program edit window.
Editor inserts POU termination instruction automatically. （ END for main ， RET for SBR ，
RETI for INT).
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