IDEC MicroSmart - Manual (Page 201)

7: B ASIC I NSTRUCTIONS
« FC4A M ICRO S MART U SER ’ S M ANUAL » 7-17
Examples: DC= and DC
≥ (Data Register Comparison)
Ladder Diagram 1
Timing Chart
DC=
5 D2
DC>=
3 D2
Input I1
ON
OFF
D10 Value
Output Q0
ON
OFF
Output Q1
ON
OFF
Instruction Data
LOD
MOV(W)
DC=
OUT
DC
≥
OUT
I1
D10 –
D2
–
D2
5
Q0
D2
3
Q1
Program List
4 4 5 5 3 3 5 2 10
I1
REP S1 –
D10
D1 –
D2
MOV(W)
10 3 7 2 2
D2 Value
0 4 5 5 3 3 5 2 10 10 3 3 2 2
Output Q0 is on when data register D2
value is 5.
Output Q1 is on when data register D2
value is 3 or more.
Q0
Q1
Ladder Diagram 2
Output Q0 is on when data register D30 value is 500.
DC=
500 D30
Timing Chart
Output Q0
ON
OFF
400 210 210 0 500
D30 Value
I1
REP S1 –
D50
D1 –
D30
MOV(W)
500 500 700
Q0
Ladder Diagram 3
DC>=
350 D15
I1
REP S1 –
D0
D1 –
D15
MOV(W)
Output Q1 is on when data register D15 value is 350 or more.
Timing Chart
Output Q1
ON
OFF
200 249 200 350 390
D15 Value
355 521 600
Q1
Ladder Diagram 4
DC>=
150 D20
DC>=
100 D20
Q0
I1
REP S1 –
D100
D1 –
D20
MOV(W)
Output Q2 is on while data register D20 value is between
149 and 100.
Timing Chart
Output Q0
ON
OFF
90 150 80 160 110
D20 Value
120 180 95
Output Q2
ON
OFF
Q0
Q2