Omron SYSMAC C20K Operation Manual page 134

BCD Calculations
TR 0
0002
1904
1904
HR 300
5-16-3 BCD MULTIPLY – MUL(32)
Limitations
If CY is not set by executing SUB(31), the result is positive, the second sub-
traction is not performed and HR 300 is not turned ON. HR 300 is pro-
grammed as a self-maintaining bit so that a change in the status of CY will
not turn it OFF when the program is recycled.
CLC(41)
SUB(31)
DM 01
HR 2
CLC(41)
SUB(31)
#0000
HR 2
HR 2
Turned ON to indicate
negative result.
Ladder Symbol
MUL(32)
Md
Mr
R
R and R + 1 must be in the same data area.
First
subtraction
10
Second
subtraction
Address Instruction
0000 LD
HR 300
0001 OUT
0002 CLC(41)
0003 @SUB(31)
0004 AND
0005 CLC(41)
0006 @SUB(31)
0007 LD
0008 AND
0009 OR
0010 OUT
Operand Data Areas
Md : Multiplicand word (BCD)
IR, DM, HR, TC, #
Mr : Multiplier word (BCD)
IR, DM, HR, TC, #
R : First result word (BCD)
Section 5-16
Operands
0002
TR 0
10
DM 01
HR 2
1904
# 0000
HR 2
HR 2
TR 0
1904
HR 300
HR 300
IR, DM, HR
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