MAN0974-14-EN_XL7_XL7P_UM
July 6, 2022
Page 103 | 199
At controller power-up or during a download, the PWM output is maintained at zero until both the
Frequency and the Duty cycle are loaded with non-zero values. When the controller is placed in stop mode,
the state of the PWM outputs is dependent on the
PWM State on Controller Stop
configuration. This
configuration allows for either hold-last-state or specific frequency and duty cycle counts. Specifying zero for
either the period or duty causes the PWM output to remain low during stop mode.
NOTE
: For standard I/O models (1E3, 1E4, 1E5, and 1E6) the maximum recommended PWM frequency is
10kHz, due to the limitations of built-in output circuitry. The
HE-XHSQ
generates 24V pulse outputs with
a recommended max of 400kHz. The
HE-XHSQ-5
generates 5V pulse outputs with a recommended max
of 1.0MHz. The add-on HSQ and HSQ-5 module can be added to the 1E2 unit for HSC function.
9.5.3 PWM Output Waveform
Figure 9.8
–
PWM Output Waveform
Table 9.5
–
PWM Output Waveform Table
Rise Time
150ns Max
Fall Time
150ns Max
PWM Period
Frequency =
1
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