IDEC FC4A-C10R2 User Manual page 340

20: P I
ULSE NSTRUCTIONS
Sample Program: PWM1
This program demonstrates a user program of the PWM1 instruction to generate pulses from output Q0, with an ON/OFF
ratio of 30% while input I0 is off or 60% when input I0 is on.
Operand Settings
Operand
S1+0 Output pulse frequency
S1+1 Pulse width ratio
S1+2 Pulse counting
S1+3 Preset value (high word)
S1+4 Preset value (low word)
S1+5 Current value (high word)
S1+6 Current value (low word)
S1+7 Error status
D1+0 Pulse output ON
D1+1 Pulse output complete
D1+2 Pulse output overflow
MOV(W) S1 –
M8120
MOV(W) S1 –
MOV(W) S1 –
I0
MOV(W) S1 –
I0
PWM
1
I1
20-12
Function
D1 – REP
2 D0
D1 – REP
0 D2
D1 – REP
30 D1
D1 – REP
60 D1
S1 D1
D0 M100
« FC4A M
Description
217.86 Hz
30% or 60%
Disable pulse counting
Not used
Not used
0: Pulse output OFF
1: Pulse output ON
0: Pulse output not complete
1: Pulse output complete
0: Overflow not occurred
1: Overflow occurred (PWM1 only)
M8120 is the initialize pulse special internal relay.
When the CPU starts, MOV(W) instructions store parameters to data regis-
ters D0 and D2.
D0 (output pulse frequency): 2 (217.86 Hz)
D2 (pulse counting): 0 (disable pulse counting)
When input I0 is off, D1 (pulse width ratio) stores 30 (30%).
When input I0 is on, D1 (pulse width ratio) stores 60 (60%).
When input I1 is on, PWM1 generates output pulses of a 30% or 60%
pulse width ratio from output Q0 depending whether input I0 is off or on,
respectively.
S U ' M
ICRO MART SER S ANUAL
Allocation No. (Value)
»
D0 (2)
D1 (30 or 60)
D2 (0)
D3
D4
D5
D6
D7
M100
M101
M102