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Symbol Math Instructions
Section 3-11
Precautions
When –(410) is executed, the Error Flag will turn OFF.
If as a result of the subtraction, the content of R is 0000 hex, the Equals Flag
will turn ON.
If the subtraction results in a borrow, the Carry Flag will turn ON.
If the result of subtracting a negative number from a positive number is nega-
tive (in the range 8000 to FFFF hex), the Overflow Flag will turn ON.
If the result of subtracting a positive number from a negative number is posi-
tive (in the range 0000 to 7FFF hex), the Underflow Flag will turn ON.
If as a result of the subtraction, the content of the leftmost bit of R is 1, the
Negative Flag will turn ON.
Examples
When CIO 000000 is ON in the following example, D00110 will be subtracted
from D00100 as 4-digit signed binary values and the result will be output to
D00120.
3-11-10 DOUBLE SIGNED BINARY SUBTRACT WITHOUT CARRY: –L(411)
Purpose
Subtracts 8-digit (double-word) hexadecimal data and/or constants.
Ladder Symbol
Variations
Applicable Program Areas
Carry Flag
CY
ON when the subtraction results in a borrow.
OFF in all other cases.
Overflow Flag
OF
ON when the result of subtracting a negative number from
a positive number is in the range 8000 to FFFF hex.
OFF in all other cases.
Underflow Flag
UF
ON when the result of subtracting a negative number from
a positive number is in the range 0000 to 7FFF hex.
OFF in all other cases.
Negative Flag
N
ON when the leftmost bit of the result is 1.
OFF in all other cases.
Name
Label
Operation
−
−
L(411)
R
Mi
Su
Mi
: Minuend word
Su
: Subtrahend word
R
: Result word
Variations
Executed Each Cycle for ON Condition
–L(411)
Executed Once for Upward Differentiation
@–L(411)
Executed Once for Downward Differentiation Not supported.
Immediate Refreshing Specification
Not supported.
Block program areas
Step program areas
Subroutines
Interrupt tasks
OK
OK
OK
OK
Summary of Contents for SYSMAC CS Series
Page 2: ......
Page 4: ...iv ...
Page 30: ...xxx ...
Page 186: ...146 List of Instructions by Function Code Section 2 4 ...
Page 1320: ...1280 Model Conversion Instructions Unit Ver 3 0 or Later Section 3 35 ...
Page 1390: ...1350 CJ series Instruction Execution Times and Number of Steps Section 4 2 ...
Page 1391: ...1351 Appendix A ASCII Code Table ASCII SP Four leftmost bits Four rightmost bits ...
Page 1392: ...1352 ASCII Code Table Appendix A ...
Page 1404: ...1364 Revision History ...