Santerno Sinus Penta - Page 399

PROGRAMMING GUIDE
SINUS PENTA
399/486
C288 (C289,C290) Selection of PID Feedback n.1 (2, 3)
C288 (C289, C290) Range
0 ÷ 14
0 ÷ 16 if ES847 is fitted
0: Disable
1: REF
2: AIN1
3: AIN2/PTC
4: Pulse Input
5: Serial Link
6: Fieldbus
7: Keypad
8: Encoder
9: Iout
10: Vout
11: Vdc
12: Pout
13: Vout measured
14: Tout
15: XAIN4
16: XAIN5
Default
C288 = 3
C289 = 0
C290 = 0
C288 = 3: AIN2/PTC
C289 = 0: Disable
C290 = 0: Disable
Level
ENGINEERING
Address
1288 (1289, 1290)
Function
C288 selects the first PID feedback source. Up to three feedback sources can
be configured among the available reference sources. If multiple sources are
selected, their sum is considered. T
hey are saturated based on parameters
P247 and P248 (PID feedback
maximum and minimum value respectively).
See also parameter C285.
Feedback source 13 is useful if C294 = 3:Add Voltage.
This is a RMS measure
of the output voltage obtained from the readout
of the values of two properly
transformed phase-to-phase output voltages from AIN1 and AIN2.
Feedback sources 15 and 16 can be selected only after setting XAIN
in
parameter R023.
C291 PID Operating Mode
C291 Range
0 ÷ 2
0: Disable
1: Normal
2: Reverse
Default
0
0: Disable
Level
ENGINEERING
Address
1291
Function
This parameter defines how to compute the PID output.
Three computing modes are available: 0: Disable, 1: Normal, 2: Reverse.
If 0: Disable is selected, the PID regulator is inactive and
its output is always
set to zero.
In Normal mode, the real PID output is considered.
If 2: Reverse is selected, the output actuated
by the PID regulator results from
the subtraction of the max. output value set in P236
from the output obtained by
the PID regulator.
This operating mode can be used for special applications (see the
Keeping
Fluid Level Constant (Example) at the end of this chapter).