PMA KS 98, Manual

Page: 80 / 246

14.4 DELA1 ( delay time )
If the clock input is not wired, the function calculates y1(t) = x1 (t-n
•
ts).
(
ts
= sampling interval,
Delay
= delay factor n)
Unless clock input clock is wired, the following is applicable: input variable
x1
is output with a delay by n times the
amount of adjusted sampling interval ts ( phase shift by n ts
×
). The effective delay time corresponds to integer multiples
of the selected time group (sampling interval ts 100/200/400/800 ms). The delay time range covers n= 0 to 255 (
0 255 .....
×
ts )
With clock input clock wired, DELA1 acts like a shift register with a length of max. 255=Parameter
delay
. This register can be switched on by one step by an external event
preset
.
Switching on is only with a positive flank ( transition from 0
r
1) at the clock input plus the adjusted delay factor (pa-
rameter delay ).
Example:
With
delay
= 4 change-over at output y is only after 4 flank changes from 0
r
1 at input cloc k
Preset
: The output provides the value applied to Preset. After (n+1) positive flanks at clock or
(n+1) sampling cycles t
S
(if clock isn't wired), the first input value x1 appears at y1.
reset
: The output provides value 0. After a positive flank at clock, value zero still is provided
for the sampling interval ts.
The function has a ‘memory’. This means: after power-on, it continues operating with values y1, z1 and z2, which ex-
isted at power-on, provided that the RAM data are still unchanged.
Inputs/outputs
Digital inputs
clock
= 0->1 clock for delaying
preset
= 1 The preset value is taken to the output
reset
= 1 Output
y1
is set to zero
Analog inputs
x1
Input variable to be delayed
Preset
Value output without delay by
preset
= 1
With several simultaneous control commands:
reset
= 1 has priority over
preset
and
stop
preset
= 1 has priority over
stop
Analog output
y1
Delayed output variable
Parameter:
Parameter Description Range Default
Delay
Delay factor n 0/1/.....255 0
Time functions
9499 040 50611
DELA1 ( delay time ) 80