On / Off Delay - Siemens Simatic RTU303xC Series Operating Instructions Manual

5.6.3

On / Off delay

Function
When there is an edge change 0 → 1 at the "Trigger" input, the configurable time of the On
delay is started. 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 configurable time of the Off
delay is started. 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 / Off delay is suppressed
and the output remains set to 0.
Tr
Ton
Toff
R
Q
Figure 5-4
Parameters
Parameters
Input parameters
En
Trigger
RTU303xC
Operating Instructions, 06/2019, C79000-G8976-C382-06
Trigger
On delay
Off delay
Reset
Output
Circuit diagram of a block. "On / Off delay"
Range of values
True / False
•
Digital input /
•
output / bit
memory
STATUS_ERROR
•
Description
Enable parameter, see section Often used parameters
(Page 252).
When there is an edge change 0 → 1 the On delay is
started.
When there is an edge change 1 → 0 the Off delay is
started.
With the setting "True" the trigger is always active.
With the setting "False" the block is never processed.
Program blocks
5.6 Blocks for time functions
265