Omron CPM1 Programming Manual

297
Binary Calculation Instructions Section 5-21
UF: ON when the result is below –32,768 (8000).
(CQM1-CPU4@-E/-EV1 only)
Example The following example shows a four-digit addition with CY used to place either
#0000 or #0001 into R+1 to ensure that any carry is preserved.
In the case below, A6E2 + 80C5 = 127A7. The result is a 5-digit number, so
CY (SR 25504) = 1, and the content of R + 1 becomes #0001.
Note For signed binary calculations, the status of the UF and OF flags indicate
whether the result has exceeded the signed binary data range (–32,768
(8000) to +32,767 (7FFF)). (CQM1-CPU4@-EV1 only)
5-21-2 BINARY SUBTRACT – SBB(51)
Limitations DM 6144 to DM 6655 cannot be used for R.
Description When the execution condition is OFF, SBB(51) is not executed. When the exe-
cution condition is ON, SBB(51) subtracts the contents of Su and CY from Mi
CLC(41)
00000
ADB(50)
010
DM 0100
HR 10
MOV(21)
#0000
HR 11
MOV(21)
#0001
HR 11
TR 0
25504
25504
= R
= R+1
= R+1
Address Instruction Operands
00000 LD 00000
00001 OUT TR 0
00002 CLC(41)
00003 ADB(50)
010
DM 0100
HR 10
00004 AND NOT 25504
00005 MOV(21)
# 0000
HR 11
00006 LD TR 0
00007 AND 25504
00008 MOV(21)
# 00001
HR 11
R+1: HR 11 R: HR 10
000127A7
Au: IR 010
A6E2
Ad: DM 0100
80C5
+
Mi: Minuend word (binary)
IR, SR, AR, DM, HR, TC, LR, #
Su: Subtrahend word (binary)
IR, SR, AR, DM, HR, TC, LR, #
Ladder Symbols
Operand Data Areas
R: Result word
IR, SR, AR, DM, HR, LR
SBB(51)
Mi
Su
R
@SBB(51)
Mi
Su
R

Omron CPM1 Specifications

General

Brand	Omron
Model	CPM1
Category	Controller
Language	English