User Manual

LOGO! functions
4.4 Special functions list - SF
LOGO!
Manual, 04/2011, A5E03556174-01
251
4.4.29 Analog Ramp
Short description
The Analog Ramp instruction allows the output to be changed from the current level to the
selected level at a specified rate.
Symbol in LOGO! Wiring Description
Input En A change in the status from 0 to 1 at input En
(Enable) applies the start/stop level (Offset "B" +
StSp) to the output for 100 ms and starts the ramp
operation to the selected level.
A change in the status from 1 to 0 immediately sets
the current level to Offset "B", which makes output
AQ equal to 0.
Input Sel SeI = 0: Level 1 is selected
SeI = 1: Level 2 is selected
A change in status of Sel causes the current level to
start changing to the selected level at the specified
rate.
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Input St A change in the status from 0 to 1 at input St
(Decelerated Stop) causes the current level to
decrease at a constant rate until the start/stop level
(Offset "B" + StSp) is reached. The start/stop level is
maintained for 100ms and then the current level is set
to Offset "B", which makes output AQ equal to 0.