West Control Solutions N8840 - Manual (Page 58)

5.2 Parameters
1 Valid for ConF/ othr/ dP = 0. With dP = 1 / 2 / 3 also 0,1 / 0,01 /
0,001 is possible.
Parameter setting level
Parameters 58 8840 profiler
Cntr
Name Value range Description Default
Pb1 1...9999 1 Proportional band 1 (heating) in phys. dimensions (e.g. °C) 100
Pb2 1...9999 1 Proportional band 2 (cooling) in phys. dimensions (e.g. °C) 100
ti1 0,1...9999 Integral action time 1 (heating) [s] 180
ti2 0,1...9999 Integral action time 2 (cooling) [s] 180
td1 0,1...9999 Derivative action time 1 (heating) [s] 180
td2 0,1...9999 Derivative action time 2 (cooling) [s] 180
t1 0,4...9999 Minimal cycle time 1 (heating) [s]. The minimum impulse is
1/4 x t1
10
t2
0,4...9999 Minimal cycle time 2 (heating) [s]. The minimum impulse is
1/4 x t2
10
SH 0...9999 Neutral zone or switching differential for on-off control
[phys. dimensions)
2
Hys.l
0...9999 Switching difference Low signaller [engineering unit] 1
Hys.H
0...9999 Switching difference High signaller [engineering unit] 1
d.SP
-1999...9999 Trigger point seperation for additional contact ∆ / Y / Off
[phys. dimensions]
100
tP 0,1...9999 Minimum impulse [s] OFF
tt 3...9999 Motor travel time [s] 60
Y2 -100...100 2. correcting variable 0
Y.Lo -120...120 Lower output limit [%] 0
Y.Hi -120...120 Upper output limit [%] 100
Y.0 -100...100 Working point for the correcting variable [%] 0
Ym.H -100...100 Limitation of the mean value Ym [%] 5
L.Ym
0...9999 Max. deviation xw at the start of mean value calculation
[phys. dimensions]
8
oFFS -120...120 Zero offset 0
PAr.2
(second parameterset
r
5.4)
Name Value range Description Default
Pb12 1...9999 1 Proportional band 1 (heating) in phys. dimensions (e.g. °C),
2. parameter set
100
Pb22
1...9999 1 Proportional band 2 (cooling) in phys. dimensions (e.g. °C),
2. parameter set
100
Ti22 0,1...9999 Integral action time 2 (cooling) [s], 2. parameter set 180