Toshiba PROSEC T1-16S PLC User's Manual - CTi Automation

7. Instructions
FUN 028 − Subtraction
Expression
Input −[ A − B → C ]− Output
144 T1-16S User’s Manual
6F3B0253
Function
When the input is ON, the data of B is subtracted from the data of A, and the result is stored in C.
If the result is greater than 32767, the upper limit value 32767 is stored in C, and the output is
turned ON. If the result is smaller than -32768, the lower limit value -32768 is stored in C, and the
output is turned ON.
Execution condition
Input Operation Output
OFF No execution OFF
ON Execution (normal) OFF
Execution (overflow or underflow occurred) ON
Operand
Name Device Register Constant Index
X Y R S T. C. XWYWRWSW T C D I J K
A Minuend √ √ √ √ √ √ √ √ √ √ √ √
B Subtrahend √ √ √ √ √ √ √ √ √ √ √ √
C Difference √ √ √ √ √ √ √ √ √ √
Example
When R005 is ON, the constant data 2500 is subtracted from the data of D0200, and the result
is stored in RW50.
If the data of D0200 is 15000, the result 12500 is stored in RW50, and R010 is turned OFF.
D0200 15000
Constant 2500
− RW50 12500 R010 is OFF
If the data of D0200 is -31000, the result is smaller than the limit value, therefore -32768 is
stored in RW50, and R010 is turned ON.
D0100 -31000 Underflow
− RW50 -32768 R010 is ON
Constant 2500
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