IDEC MicroSmart - Manual (Page 376)

22: D UAL / T EACHING T IMER I NSTRUCTIONS
22-2 « FC4A M ICRO S MART U SER ’ S M ANUAL »
Valid Operands
For the valid operand number range, see page 6-2.
▲ Internal relays M0 through M1277 can be designated as D1. Special internal relays cannot be designated as D1.
Destination operand D2 (system work area) uses 2 data registers starting with the operand designated as D2. Data registers
D0 through D1298 and D2000 through D7998 can be designated as D2. The two data registers are used for a system work
area. Do not use these data registers for destinations of other advanced instructions, and do not change values of these data
registers using the Point Write function on
WindLDR . If the data in these data registers are changed, the dual timer does not
operate correctly.
The dual timer instructions cannot be used in an interrupt program. If used, a user program execution error will result,
turning on special internal relay M8004 and the ERR LED on the CPU module.
Examples: DTML, DTIM, DTMH, DTMS
For the timer accuracy of timer instructions, see page 7-8.
Operand Function I Q M R T C D Constant
S1 (Source 1) ON duration — — — — — — X 0-65535
S2 (Source 2) OFF duration — — — — — — X 0-65535
D1 (Destination 1) Dual timer output — X
▲ X — —
— —
D2 (Destination 2) System work area — — — — — — D0-D7998 —
Instruction Increments S1 ON duration S2 OFF duration
DTML 1 sec 2 1 sec
× 2 = 2 sec
1 1 sec
× 1 = 1 sec
DTIM 100 ms 10 100 ms
× 10 = 1 sec
5 100 ms
× 5 = 0.5 sec
DTMH 10 ms 50 10 ms
× 50 = 500 ms
25 10 ms
× 25 = 250 ms
DTMS 1 ms 250 1 ms
× 250 = 250 ms
125 1 ms
× 125 = 125 ms
500 ms 250 ms
I0
D2
D100
While input I0 is on, four dual timer instructions turn on and off
the destination operands according to the on and off durations
designated by source operands S1 and S2.
S1
2
D1
M10
DTML S2
1
D2
D200
S1
10 D1
M20
DTIM S2
5
D2
D300
S1
50 D1
M30
DTMH S2
25
D2
D400
S1
250
D1
M40
DTMS S2
125
M10
ON
OFF
M20
ON
OFF
M30
ON
OFF
I0
ON
OFF
2 sec
M40
ON
OFF
1 sec
1 sec 0.5 sec
250 ms 125 ms