6F3B0253
Basic Hardware and Function 203
7. Instructions
FUN 128 CALL Subroutine call
Expression
Input −[ CALL N. n ]− Output
Function
When the input is ON, this instruction calls the subroutine number n.
Execution condition
Input Operation Output
OFF No execution OFF
ON Execution ON
Operand
Name Device Register Constant Index
X Y R S T. C. XWYWRWSW T C D I J K
nSubroutine
number √ (Note)
Example
When X007 is ON, the subroutine number 8 is called. When the program execution is returned
from the subroutine, the output is turned ON.
Main program Subroutin e
| | [ CALL N.008 ] [ SUBR (008)]
[ RET ]
Note
• The possible subroutine number is 0 to 15 (T1) or 0 to 255 (T1S).
• Refe r to t h e SUBR instruction (FUN 137).
• In case of T1, nesting of subroutines is not allowed. That is, the CALL instruction cannot be
used in a subroutine.
• In case of T1S , nesti ng of subroutines is possible. (up to 3 levels)
• The CALL instruction can be used in an interrupt program. However, it is not allowed that the
same subroutine is called from an interrupt program and from main program.