Bosch R911172904, Hardware Manual

Page: 147 / 243

PWM signal specifications Unit Minimum Typical Maximum
Digital output PWM frequency Hz 0.1 10 000
PWM duty cycle % 0 100
Pulse accuracy for f
PWM
> 6.25
Hz
ms 1
Pulse accuracy for f
PWM
≤ 6.25
Hz
µs 10
Digital output on-delay,
before PWM μs 0 10 000 000
On-delay accuracy for t
DELAY
≤
160 ms
μs 10
On-delay accuracy for t
DELAY
>
160 ms
ms 1
Tab. 11-10: PWM signal specifications of the digital outputs
The PWM signal is defined by the NYCe 4000 software through the PWM
frequency parameter specified in Hz, and the duty cycle parameter specified
in %. These two parameters are internally converted to pulse duration "a" and
pulse pause duration "b" (see fig. 11-12 "PWM signal specification
parameters" on page 138 ) which can only have a discrete increment step
size. The increment step size is equal to the pulse accuracy and depends on
the specified PWM frequency. These discrete values for the pulse duration
and pulse pause duration imply that the actual PWM frequency and duty
cycle may differ from the specified PWM frequency and duty cycle.
active state
inactive state
on_delay
set
a b
T
T =
1
f
pwm
duty cycle
a =
T *
100%
b = T - a
Fig. 11-12: PWM signal specification parameters
The schematic of the digital output is given in
fig. 11-13 "DigOut0 and
DigOut1" on page 139 .
138/233
NY4140: High Voltage Drive Module
NYCe 4000 Multi-axis motion control system Hardware Sys‐
tem Manual
Bosch Rexroth AG R911337671_Edition 18