Table of Contents
Advertisement
4 Commissioning
4.1 Adapting the controller direction of effect to the controlled system
S controller
The following is prescribed:
Direc-
Direction
Direc-
tion
of effect
of effect
of effect
of the
of the
of effect
of effect
of the
actuator
of the
system
system
and ac-
tuator
+∆y
normal
normal
opens
rever-
+∆y
y
rever-
sing
i
opens
If the actuator is connected reversing as an exception (+∆y closes), the position feedback must also be reversed and the
controller direction of effect (Kp) negated.
Table 4-2
Controller direction of effect and y-display direction of effect of system and actuator direction
of effect in S-controllers
D Direction of effect of system and actuator unknown
Put controller in manual mode, leave structure switches S54, S56 and S68 in factory setting
(0).
-- Determine direction of effect of the actuator
Press the right manipulated variable adjusting key if possible with the process switched
off or near to its safety position and observe whether the actuator opens or closes. If the
actuator opens this means it has normal effect. If closing is determined in S-controllers,
the connections +∆y and -∆y should be switched.
The actuator can be monitored as follows:
-- normal effect system:
-- reversing member:
-- in S-controllers and already
correctly connected
position feedback:
-- The actuator can be monitored additionally at the installation location.
-- Determine the direction of effect of the system
Actuate the right manipulated variable and observe on the actual value display whether
the controlled variable (actual value) rises or falls. Rising means normal effect system
with normal effect actuator, reversing effect system with reversing actuator. Falling
means reversing effect system with normal effect actuator, normal effect system with re-
versing actuator. With the direction of effect of actuator and system determined in this
way, the controller can be set according to table 4-1, page 215 and table 4-2.
216
Select the desired effect here:
pressing the right key cau-
tion
ses in manual operation:
active switching
output is
+∆y
-∆y
sing
i
+∆y
rising x means normal effect actuator
falling x means normal effect actuator
rising y-display means normal effect
actuator
This gives settings of S54 or
S56 and S68 and function of
S56
actual
value/
value/
control-
t l
S54
led
valve
or
variable
S56
rises
opens
rises
0
closes
rises
1
opens
falls
1
Manual
g
g
d S68
d f
ti
f
the controller
Kp
S68
y
=
An
(cP)
pos.
0
y
R
neg.
1
100 % - y
R
neg.
0
y
R
SIPART DR22 6DR2210
C79000-G7476-C154-03
Hide quick links:
Advertisement
Table of Contents
