Simex multicon cmc-99 - Page 159

User Manual For - CONTROLLER/DATA RECORDER MultiCon CMC-99/141
The duty cycle
D
is defined as the ratio between the pulse duration
t
and the period
Τ
of
a rectangular waveform:
duty cycle
D=
t
T
where:
t - is the duration that the function is active
Τ - is the period of the function.
Fig. 7.87. Normalized duration (t
n
) of the output signal in PWM mode for parameters: Lower
level=4, Upper level=14 (input signal lower than 4 has t
n
=0, higher than 14 has t
n
=1)
Timing
parameter block
The parameters of this block include:
–
Period
- the duration of one cycle of output pulse (the minimum value is 0.1
seconds),
–
Minimum ON time
- minimum duration of high state (after switching to high state,
switch back is possible after
Minimum On time
), see
Fig. 7.88
,
–
Minimum OFF time
- minimum duration of low state (after switching to low state,
switch back is possible after
Minimum OFF time
), see
Fig. 7.88
,
159
0 2 4 6 8 10 12 14 16
0
0,2
0,4
0,6
0,8
1
Lower
level
Upper
level
D
Input
value