Pulse Generator; Random On/Off Delay - Siemens Simatic RTU303xC Series Operating Instructions Manual

Program blocks
5.6 Blocks for time functions
5.6.5

Pulse generator

Function
A regularly clocked pulse is output at the output. The cycle length is specified for the duration
of the 0 and 1 signal using the function parameters.
Parameters
Parameters
Input parameters
En
Function parameters
Pulse duration
(ms)
Interpulse period
(ms)
Output parameters
Output
5.6.6

Random on/off delay

Function
When there is an edge change 0 → 1 at the "Trigger" input, the random time of the On delay
is started (within the configured limits). After the On delay has elapsed, the output is set to 1.
If "Trigger" changes back to 0 before the On delay has elapsed, the delay time is stopped
and the output remains set to 0.
When there is an edge change 1 → 0 at the "Trigger" input, the random time of the Off delay
is started (within the configured limits). After the Off delay has elapsed, the output is set to 0.
If "Trigger" changes back to 1 before the Off delay has elapsed, the output is set to 0. At the
same time the running of the On delay is restarted and the Off delay is stopped.
When there is an edge change 0 → 1 at the input "Reset" the On delay is suppressed and
the output remains set to 0.
For the diagram, refer to On / Off delay.
268
Range of values Description
Enable parameter, see section Often used parameters
(Page 252).
500 .. 999999999 Time (milliseconds) in the clock cycle during which the
output = 1.
500 .. 999999999 Time (milliseconds) in the clock cycle during which the
output = 0.
Tag in which the pulses generated by the block are out-
Digital output / bit
•
put.
memory
Operating Instructions, 06/2019, C79000-G8976-C382-06
RTU303xC