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449
Symbol Math Instructions
Section 3-11
Precautions
When –C(412) 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 and CY from a positive number
is negative (in the range 8000 to FFFF hex), the Overflow Flag will turn ON.
If the result of subtracting a positive number and CY from a negative number
is positive (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.
Note
To clear the Carry Flag (CY), execute the Clear Carry (CLC(041)) instruction.
Examples
When CIO 000000 is ON in the following example, D00110 and CY will be
subtracted from D00100 as 4-digit signed binary values and the result will be
output to D00120.
3-11-12 DOUBLE SIGNED BINARY SUBTRACT WITH CARRY: –CL(413)
Purpose
Subtracts 8-digit (double-word) hexadecimal data and/or constants with the
Carry Flag (CY).
Ladder Symbol
Variations
Applicable Program Areas
Operand Specifications
–CL(413)
R
Mi
Su
Mi
: Minuend word
Su
: Subtrahend word
R
: Result word
Variations
Executed Each Cycle for ON Condition
–CL(413)
Executed Once for Upward Differentiation
@–CL(413)
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
Area
Mi
Su
R
CIO Area
CIO 0000 to CIO 6142
Work Area
W000 to W510
Holding Bit Area
H000 to H510
Auxiliary Bit Area
A000 to A958
A448 to A958
Timer Area
T0000 to T4094
Counter Area
C0000 to C4094
Содержание SYSMAC CS1D-CPU**
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Страница 185: ...146 List of Instructions by Function Code Section 2 4...
Страница 193: ...154 3 35 4 MOVE BIT MOVBC 568 1274 3 35 5 BIT COUNTER BCNTC 621 1276 3 35 6 GET VARIABLE ID GETID 286 1278...
Страница 1389: ...1350 CJ series Instruction Execution Times and Number of Steps Section 4 2...
Страница 1390: ...1351 Appendix A ASCII Code Table ASCII SP Four leftmost bits Four rightmost bits...
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