Simex PUR-49D, User Manual

Page: 29 / 80

User manual - CONTROLLER PUR-49D
6.3.1. One threshold mode
6.12 presents the principle of relay outputs operation for one threshold mode for an
example values of other parameters.
Description:
A, B, C, D - points where measured signal exceeds border values (expected value ± allowed deviation)
B
ON
, B
OFF
, D
ON
, D
OFF
- relays state changes moments: (for “t on” > 0, “toFF” > 0)
t
A
, t
B
, t
C
, t
D
- time periods while input signal is in zone A or zone B
Figure 6.12. Principle of LED/relay output operation for one threshold mode
Parameter “SEtP” sets a threshold of the relay, and parameter “HYSt” sets a
hysteresis of the relay ( 6.12a ). The relay can change his state only when input value
exceeds (over or under) border value and t
A
,t
B
,t
C
,t
D
times ( 6.12 ) are bigger than the time
defined by parameters “t on ” , “ toFF ” and “ unit ” . Border values means values equal
threshold + hysteresis and threshold - hysteresis respectively.
If “t on” and “toFF” parameters are set to “ 0 ”, then the relay state will be changed
as soon as input value exceeds any of the border values (see points A and C, 6.12 a, b, c ).
If values of “t on” or/and “toFF” are positive, then relay state will be turned on if the
input value exceeds the border values and stay bigger (or lower) during at least “t on” (see
points B
ON
, D
ON
, 6.12 a, d, e ). Similarly, the relay will be turned off if time “toFF” elapse since
the input signal value exceeds any of the border values (see points B
OFF
, D
OFF
, 6.12a, d, e ).
If time t
A
,t
B
,t
C
,t
D
(when input signal stay in zone A or zone B ) are lower than parameters
“ t on ” or “ toFF ” , the relay will not change his state (see points A and C, 6.12 a, d, e ).
The state of relay output while the input value exceeds the border values (points A, B,
C, D) is described by parameter “modE”. The relay can be turned on ( “modE” = ”on” ), or
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“SEtP” parameter
(expected signal value)
“HYSt” parameter
(allowed signal
deviation)
measured
signal
displayed value
time
time
time
A
B
C D
relay state
( modE = on
t on = 0
toFF = 0)
relay state
( modE = on
t on > 0
toFF > 0)
t
A
t
B
t
C
t
D
B
ON
D
OFF
relay state
( modE = oFF
t on = 0
toFF = 0)
relay state
( modE = oFF
t on > 0
toFF > 0)
“toFF”
parameter
“t on”
parameter
B
OFF
D
ON
time
time
closed
open
a)
b)
c)
d)
e)
open
closed
open
open
closed
closed
“t on”
parameter
“toFF”
parameter
zone A
zone B