IDEC FC4A-C10R2 User Manual page 236

11: B A
INARY RITHMETIC
Repeat Operation in the ADD and SUB Instructions
Source operands S1 and S2 and destination operand D1 can be designated to repeat individually or in combination. When
destination operand D1 is not designated to repeat, the final result is set to destination operand D1. When repeat is desig-
nated, consecutive operands as many as the repeat cycles starting with the designated operand are used.
Since the repeat operation works similarly on the ADD (addition) and SUB (subtraction) instructions of the word and inte-
ger data types, the following examples are described using the ADD instruction of the word data type.
Repeat One Source Operand
When only S1 (source) is designated to repeat, the final result is set to destination operand D1.
ADD(W)
SOTU
I1
Repeat Destination Operand Only
When only D1 (destination) is designated to repeat, the same result is set to 3 operands starting with D1.
ADD(W)
SOTU
I1
Repeat Two Source Operands
When S1 and S2 (source) are designated to repeat, the final result is set to destination operand D1.
ADD(W)
SOTU
I1
Repeat Source and Destination Operands
When S1 (source) and D1 (destination) are designated to repeat, different results are set to 3 operands starting with D1.
ADD(W)
SOTU
I1
Repeat All Source and Destination Operands
When all operands are designated to repeat, different results are set to 3 operands starting with D1.
ADD(W)
SOTU
I1
Note: Special internal relay M8003 (carry/borrow) is turned on when a carry or borrow occurs in the last repeat operation.
When a user program execution error occurs in any repeat operation, special internal relay M8004 (user program execution
error) and the ERR LED are turned on and maintained while operation for other instructions is continued.
11-4
I
NSTRUCTIONS
S1 R S2 – D1 –
D10 D20 D30
S1 – S2 – D1 R
D10 D20 D30
S1 R S2 R D1 –
D10 D20 D30
S1 R S2 – D1 R
D10 D20 D30
S1 R S2 R D1 R
D10 D20 D30
« FC4A M
ICRO
S1 (Repeat = 3)
REP
D10 10
3
D11 15
D12 20
S1 (Repeat = 0)
REP
D10 10
3
D10 10
D10 10
S1 (Repeat = 3)
REP
10
D10
3
15
D11
20
D12
S1 (Repeat = 3)
REP
D10 10
3
D11 15
D12 20
S1 (Repeat = 3)
REP
10
D10
3
15
D11
20
D12
S U ' M »
MART SER S ANUAL
S2 (Repeat = 0)
+ D20 25
+ D20 25
+ D20 25
S2 (Repeat = 0)
+ D20 25
+ D20 25
+ D20 25
S2 (Repeat = 3)
25
+ D20
35
+ D21
45
+ D22
S2 (Repeat = 0)
+ D20 25
+ D20 25
+ D20 25
S2 (Repeat = 3)
25
+ D20
35
+ D21
45
+ D22
D1 (Repeat = 0)
D30 (35)
D30 (40)
D30 45
D1 (Repeat = 3)
D30 35
D31 35
D32 35
D1 (Repeat = 0)
(35)
D30
(50)
D30
65
D30
D1 (Repeat = 3)
D30 35
D31 40
D32 45
D1 (Repeat = 3)
35
D30
50
D31
65
D32