2 Instructions
2-170 CP1E CPU Unit Instructions Reference Manual(W483)
–C/–CL
Applicable Program Areas
Operands
Operand Specifications
Flags

Instruction Mnemonic Variations Function

code Function

SIGNED BINARY SUBTRACT

WITH CARRY –C @–C 412 Subtracts 4-digit (single-word) hexadecimal data

and/or constants with the Carry Flag (CY).

DOUBLE SIGNED BINARY

SUBTRACT WITH CARRY –CL @–CL 413 Subtracts 8-digit (double-word) hexadecimal data

and/or constants with the Carry Flag (CY).
Symbol
–C –CL
Area Step program areas Subroutines Interrupt tasks
Usage OK OK OK
Operand Description Data type Size
–C –CL –C –CL
Mi –C: Minuend word
–CL:First minuend word INT DINT 1 2
Su –C: Subtrahend word
–CL:First subtrahend word INT DINT 1 2
R–C: Result word
–CL:First result word INT DINT 1 2
Area Word addresses Indirect DM addresses Constants CF Pulse bits TR bits
CIO WR HR AR T C DM @DM *DM
Mi, Su OK OK OK OK OK OK OK OK OK OK --- --- ---
R---
Name Label Operation
–C –CL
Error Flag P_ER OFF OFF
Equals Flag P_EQ ON when the subtraction result is 0.
OFF in all other cases.
ON when the result is 0.
OFF in all other cases.
Carry Flag P_CY ON when the subtraction results in a borrow.
OFF in all other cases.
ON when the results in a borrow.
OFF in all other cases.
Overflow Flag P_OF ON when the result of subtracting a negative num-
ber and CY from a positive number is in the range
8000 to FFFFhex.
OFF in all other cases.
ON when the result of subtracting a negative num-
ber and CY from a positive number is in the range
80000000 to FFFFFFFF hex.
OFF in all other cases.
Underflow Flag P_UF ON when the result of subtracting a positive num-
ber and CY from a negative number is in the
range 0000 to 7FFFhex.
OFF in all other cases.
ON when the result of subtracting a positive num-
ber and CY from a negative number is in the
range 00000000 to 7FFFFFFF hex.
OFF in all other cases.
Negative Flag P_N ON when the leftmost bit of the result is 1.
OFF in all other cases.
ON when the leftmost bit of the result is 1.
OFF in all other cases.
R
Mi
Su
Mi: Minuend word
Su: Subtrahend word
R: Result word
–C(412) –CL(413)
R
Mi
Su
Mi: Minuend word
Su: Subtrahend word
R: Result word