gefran 450-R-R-1 User Manual

12
81505C_MHW_450_10-2016_ENG
• Pro
6 • ALARM
time
AL + Hy.1
AL
alarm
(*)
For AL = reverse absolute alarm (low) with positive Hy.1, Al.t= 1
(*) = OFF if disabled on power-up
For AL = symmetrical Lo absolute alarm with Hy.1, Al.t = 5
For AL = symmetrical Hi absolute alarm with Hy.1, Al.t = 4
* Minimum hysteresis = 3 scale points
Normal absolute alarm Symmetrical absolute alarm
reverse
direct
AL
AL + [ Hy.1* ]
AL - [ Hy.1* ]
time
For AL = Lo deviation alarm with negative Hy.1, Al.t = 3
For AL = Hi deviation alarm with negative Hy.1, Al.t = 2
For AL = Symmetrical Lo deviation alarm with Hy.1, Al.t = 7
For AL = Symmetrical Hi deviation alarm with Hy.1, Al.t = 6
time
SP+AL
SP
reverse
direct
SP+AL
SP
reverse
direct
time
Hy.1
Symmetrical deviation Alarm Symmetrical deviation Alarm
SP-AL
Proportional Action:
action in which contribution to output is proportional to deviation at input (deviation = difference between controlled variable and
setpoint).
Derivative Action:
action in which contribution to output is proportional to rate of variation input deviation.
Integral Action:
action in which contribution to output is proportional to integral of time of input deviation.
Influence of Proportional, Derivative and Integral actions on response of process under control
* An increase in P.B. reduces oscillations but increases deviation.
* A reduction in P.B. reduces the deviation but provokes oscillations of the controlled variable (the system tends to be unstable
if P.B. value is too low).
* An increase in Derivative Action corresponds to an increase in Derivative Time, reduces deviation and prevents oscillation up
to a critical value of Derivative Time, beyond which deviation increases and prolonged oscillations occur.
* An increase in Integral Action corresponds to a reduction in Integral Time, and tends to eliminate deviation between the
controlled variable and the setpoint when the system is running at rated speed.
If the Integral Time value is too long (Weak integral action), deviation between the controlled variable and the setpoint may
persist.
Contact GEFRAN for more information on control actions.
7 • CONTROL ACTIONS
Pro
Protection code
Pro Display Change
0 SP, AL.1, Ou.P,UPd SP, AL1
1 SP, AL.1, Ou.P,UPd SP
2 SP, UPd SP
3 SP, UPd
+4 disables InP, Out
+8 disables CFG
+16 disables “SW turn on - turn off”
+32 disables MAN/AUTO key and switching automatically
+ 64 to disable manual power memorization
To activate the turn off SW function, press keys F
F +
Δ for 5 secs. in P.V.
To return to normal functioning, press key F for
5 secs.
Configuraz.
0
Default Custom
30

gefran 450-R-R-1 Specifications

General

Brand	gefran
Model	450-R-R-1
Category	Controller
Language	English