Random Generator - IDEC FL1E-H12RCA User Manual

IDEC SmartRelay functions
4.4.8

Random generator

Short description
The output of the random generator is set or reset within a
configured time.
Symbol in IDEC
SmartRelay
Parameter T and T
H
Note the defaults of the T
Chapter 4.3.2.
The on-delay time TH and the off-delay time TL can be
provided by the actual value of another already-programmed
function. You can use the actual values of the following
functions:
• Analog comparator (actual value Ax - Ay, see Chapter
4.4.18)
• Analog trigger (actual value Ax, see Chapter 4.4.16)
• Analog amplifier (actual value Ax, see Chapter 4.4.20)
• Analog multiplexer (actual value AQ, see Chapter 4.4.26)
• Analog ramp control (actual value AQ, see Chapter
4.4.27)
• Analog math (actual value AQ, see Chapter 4.4.30)
• PI controller (actual value AQ, see Chapter 4.4.28)
• Up/down counter (actual value Cnt, see Chapter 4.4.13)
Select the required function by the block number. The
timebase is configurable. For information on valid ranges
and parameter defaults, refer to Chapter 4.4.1.
144
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Wiring
Input En
Parameter
Output Q
L
and T
H
Description
A positive edge ( 0 to 1 transition) at
input En (Enable) triggers the on-
delay time of the random generator.
A negative edge ( 1 to 0 transition) at
input En (Enable) triggers the off-
delay time of the random generator.
The on-delay is set at random to a
value between 0 s and T
The off-delay is set at random to a
value between 0 s and T
Output Q is set when the on-delay
has expired and if En is still set. It is
reset when the off-delay has expired,
provided En was not set again
meanwhile.
parameters listed in
L
IDEC SmartRelay Manual
.
H
.
L