nvent raychem tcontrol-cont-03 Operating And Installation Manual page 18

Parameters Symbol
Proportional
Pb1
band
Pb2
1)
Derivative
dt
time
Reset time
rt
1) For 3-state controllers only (controller output 2)
Cycle time
Cy1
of output
Cy2
1)
Dead band
db
Hysteresis
HyS1
HyS2
1)
Valve
tt
run time
Operating
y0
value
Output
y1
value limits
y2
1) For 3-state controllers only (controller output 2)
18 | nVent.com
Value
range Description
0...9999 Proportional band
At Pb1,2 = 0, the controller structure
0...9999
is ineffective. For the continuous
controller Pb1,2 must be > 0.
0... Influences the differential component
9999s of the controller output signal
The larger the derivative time
the higher the effectiveness of
the D component.
0... Influences the integral component of
9999s the controller output signal
The larger the reset time the lower the
effectiveness of the I component.
0... For a switching output, the cycle time
20... should be selected such that on one
9999s hand no inadmissible process values
fluctuations are generated and on
0...
the other hand no overload of the
20...
actuators occurs by the cyclic supply
9999s
of energy.
0.0... Spacing between the two control
999.9 contacts of the 3-state controller and
the modulating controller
0.0... Hysteresis for switching controller
1.0... with Pb1,2 = 0.
999.9
100%
0.0...
1.0...
999.9
0%
5...60... Used run time range of the control
3000s valve (actuator) of the modulating
controller
-100... Output value for P and PD controllers
0... (for x = w is y = Y0)
+100%
0...100% Maximum output value limit
Minimum output value limit
-100...
(Only effective when Pb>0!)
+100%
HyS1, 2
y
w
x