Siemens SIMATIC ET 200SP Manual page 70

Pulsed cam output
It is possible to pulse the cams. This function can be activated via a control interface and is
active while a cam has state 1. You configure the pulsed cam output with the "Pulsed cam
output duty cycle" and "Pulsed cam output period" parameters.
You use the "Pulsed cam output duty cycle" parameter (0 ... 1000) to specify the pulse duty
cycle of the "modulated upon" pulse within the configured period.
Note
In contrast to the "Pulse width modulation" operating mode, the duty cycle cannot be
updated cyclically as a function of an output value from the user program.
You use the "Pulsed cam output period" parameter to specify the frequency of the pulse
"modulated upon" for the cam control.
Note
The edges of the pulsed output cam are not synchronized with the cam start or end.
If the interpulse period is currently active, the first rising edge can come later at the cam start
and the last falling edge can come earlier at the cam end.
①
T
ON
②
Period
Duty cycle = T
ON
Figure 6-9 Pulsed cam output
Example of the application of the pulsed cam output:
A glue trace is to be applied to a box for adhesion. To save glue, glue dots will be placed
instead of a continuous trace in the switch-on range (cam).
See also
Pulse width modulation (Page 46)
Digital output module DQ 4x24VDC/2A HS (6ES7132-6BD20-0DA0)
Manual, 06/2018, A5E32855695-AC
/ Period * 100%
Cam control operating mode
6.2 Parameters/address space
69