User Manual

Rockwell Automation Publication 1752-UM001E-EN-P - June 2014 257
Function Blocks Command Reference Appendix D
Pulse Generator
Figure 81 - Pulse Generator Function Block Diagram
The Pulse Generator function block generates an On/Off pulse output at the
output enable signal while the function block’s input signal is on.
The pulse’s on-time and off-time can be set independently between 10 ms and 3
seconds in 10 ms increments. When the on-time is set to 100 ms and the off-time
is set to 500 ms, the signal will be repeatedly turned on for 100 ms and then off
for 500 ms.
The output pulse width will have a timing error equivalent to the cycle time of
the SmartGuard controller. For example, if the SmartGuard controller’s cycle
time is 7 ms and the pulse width is set to 100 ms, the output pulse will be
anywhere between 93 and 107 ms.
Pulse Generator Function Block Parameters
Set these parameters for the Pulse Generator function block.
Pulse Generator Function Block Timing Chart
Figure 82 - Pulse Generator Timing Chart
Table 32 - Pulse Generator Function Block Parameters
Parameter Valid Range Default Setting
On pulse time 10 ms…3 s in 10 ms increments
(1)
(1) The set value must be longer than the controller’s cycle time.
500 ms
Off pulse time 10 ms…3 s in 10 ms increments
(1)
500 ms
Input
Output Enable
On Pulse Time:
500 ms
Input 1 (NO)
Output Enable
Idle to Run