ABB AX410, User Manual

Page: 46 / 84

Single and Dual Input Analyzers for Low Level Conductivity
AX410, AX411, AX413, AX416, AX418, AX450, AX455 & AX456 5 PROGRAMMING
44 IM/AX4CO Issue 11
Time Proportioning Output
The Time Proportioning Output is interrelated to the retention time of the vessel and the
flow of the chemical reagent and is adjusted experimentally to ensure that the chemical
reagent is adequate to control the dosing under maximum loading. It is recommended
that the Time Proportioning Output is adjusted in Manual Mode set to 100% valve
output before setting up the PID parameters.
The time proportioning output value is calculated using the following equation:
on time =
Set the cycle time, between 1.0 and 300.0 seconds in 0.1 second increments - see
appendix B on page 78, Fig. B.4 Mode C.
Note.
Changes to the cycle time do not take effect until the start of a new cycle.
See Section 5.8.2.
See Section 5.9.
Analog Output
Set the analog current output range.
See Section 5.8.2.
See Section 5.9.
Cycle Time
10.0
Secs
Power Recovery
Output Type
set to
Time
PID Controller
CONFIG. SECURITY
Output Range
----
4-20mA
0-20mA
0-10mA
Output Type
set to
Analog
Power Recovery
PID Controller
CONFIG. SECURITY
control output x cycle time
100
2.5s 7.5s
Energized
Output = 50%
Output = 75%
De-energized
Energized
De-energized
2.5s
Cycle Time = 10s
Energized
Permanently de-energized
Output = 0%
Output = 25%
De-energized
Permanently energized
Output = 100%
7.5s
5s 5s