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6F3B0250
Basic Hardware and Function
221
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 Re
g
ister Constant Index
X Y R S T. C. XW YW RW SW T C D I J K
n
Subroutine
number
Ö
(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 Subroutine
| | [ CALL N.008 ] [ SUBR (008)]
[ RET ]
Note
·
The possible subroutine number is 0 to 15 (T1) or 0 to 255 (T1S).
·
Refer to the 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, nesting 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.
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