Evoqua WALLACE & TIERNAN SFC, Original Instruction Manual

Page: 100 / 288

100
WT.050.590.000.DE.IM.0719
Functions
SFC
4.
Adaption sequence
Each adaption phase is then displayed with a status message:
Various status messages can be output, depending on the
selection of the actuator. Different status messages also have
different execution times. It is possible that some status messages
are only displayed briefly or not at all if the execution time is very
short.
Caution!
Adaption can take up to 13 hours, depending on the control loop.
During this time no errors should occur on the control loop (e.g.
filter backwashing, changes in the circulation or widely fluctuating
number of visitors).
Please note
The adaption procedure can be terminated at any time with
"STOP". The previously set parameters remain unchanged.
Display text Explanation
"
0:
Init“ Start
"
1:
Ym = 0 %“ Chlorinator to 0 % or dosing pump off
"
2:
X = 20 %“ Delay until actual value < 0.2 x 2x
setpoint
"
3:
Ym = 100 %“ Chlorinator to 100 % or dosing pump
on
"4: Ym = 100 %“ Wait until the chlorinator reaches 100
%
"5:
Tu!
"
Start dead time measurement
"6:
Tu!
"
Measurement of the loop dead time Tu
"7: Tu Check“ Plausibility enquiry dead time
"8: Init Ts“ Start of rise time measurement
"9:
Ts
"
Measurement of the loop rise time Ts
"
10: TS
"
Calculate control parameters
"
11:
Y = 0 %“ Chlorinator to 0 % or dosing pump off
"
12:
Y = 0 %“ Wait until the chlorinator reaches 0 %
"
13:
Adaption OK“ End