20: PULSE INSTRUCTIONS
« FC4A MICROSMART USER’S MANUAL » 20-23
Sample Program: RAMP — Reversible Control with Dual Pulse Output
This program demonstrates a user program of the RAMP instruction to generate 30,000 pulses from output Q0 (forward
pulse) or Q1 (reverse pulse) while input I1 is off or on, respectively.
Steady pulse frequency: 5,000 Hz
Initial pulse frequency: 2,000 Hz
Frequency change rate: 100 Hz / 10 ms
Reversible control enable: Reversible control with dual pulse output
Preset value: 30,000 pulses total
Operand Settings
Operand Function Description Allocation No. (Value)
S1+0 Operation mode Frequency range 100 to 10,000 Hz D0 (1)
S1+1 Steady pulse frequency 10,000 Hz × 50% = 5,000 Hz D1 (50)
S1+2 Initial pulse frequency 10,000 Hz × 20% = 2,000 Hz D2 (20)
S1+3 Frequency change rate 10,000 Hz × 1% = 100 Hz D3 (1)
S1+4 Reversible control enable Reversible control with dual output D4 (2)
S1+5 Control direction 0 (forward) or 1 (reverse) D5 (0 or 1)
S1+6 Preset value (high word)
30,000
D6 (0)
S1+7 Preset value (low word) D7 (30000)
S1+8 Current value (high word)
0 to 30,000
D8
S1+9 Current value (low word) D9
S1+10 Error status D10
D1+0 Pulse output ON
0: Pulse output OFF
1: Pulse output ON
M100
D1+1 Pulse output complete
0: Pulse output not complete
1: Pulse output complete
M101
D1+2 Pulse output status
0: Steady pulse output
1: Changing output pulse frequency
M102
D1+3 Pulse output overflow
0: Overflow not occurred
1: Overflow occurred
M103
M8120
M8120 is the initialize pulse special internal relay.
When the CPU starts, seven MOV(W) instructions store parameters to
data registers D0 through D7.
D0 (operation mode): 1 (100 to 10,000 Hz)
D1 (steady pulse frequency): 50 (10,000 Hz × 50% = 5,000 Hz)
D2 (initial pulse frequency): 20 (10,000 Hz × 20% = 2,000 Hz)
D3 (frequency change rate): 1 (10,000 Hz × 1% = 100 Hz)
D4 (reversible control enable): 2 (reversible control with dual output)
D6 (preset value high word): 0
D7 (preset value low word): 30,000
When input I1 is off, D5 (control direction) stores 0 (forward).
When input I1 is on, D5 (control direction) stores 1 (reverse).
When start input I0 is turned on, RAMP starts to generate 30,000 output
pulses.
I0
REPS1 –
1
MOV(W) D1 –
D0
REPS1 –
50
MOV(W)
D1 –
D1
REPS1 –
20
MOV(W) D1 –
D2
REPS1 –
1
MOV(W) D1 –
D3
REPS1 –
2
MOV(W)
D1 –
D4
D1
M100
RAMP S1
D0
REPS1 –
0
MOV(W) D1 –
D6
REPS1 –
30000
MOV(W)
D1 –
D7
REPS1 –
0
MOV(W) D1 –
D5
REPS1 –
1
MOV(W) D1 –
D5
I1
I1
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