Ecolab MULTRONIC Manuel Technique page 33

The type of controller can be selected with the control device function.
Value range: Signalling device / 2-pt. PID / 2-pt. fuzzy / 2-pt. aFUZa / 2-pt. aFUZs / 3-pt.
PID / 3-pt. fuzzy / 3-pt. aFUZa / 3-pt. aFUZs
The settings aFUZa and aFUZs relate to adaptive fuzzy controllers that independently
adapt themselves to the control process. aFUZa is an asymptotic fuzzy controller without
overshoots. aFUZs attains the nominal value with a quick algorithm while accepting
overshoots.
If the integrated enable lead is to be used for controller enabling this can be specified under
ext. controller enable.
Value range: on / off
The type of acknowledgement for the limit-alarm message can be selected under limit
acknowledgement.
Value range: man / auto
If the man setting has been selected, the alarm message can only be acknowledged through
the ENTER key. If the auto setting has been selected, the alarm message will be
acknowledged in addition when the measured value has moved out of the limit range (see
controller parameters).
The add. controller enable function denotes an enable contact that is mounted to another
module at the enable terminals. This can be used in addition for controller enabling.
Value range (if conductive C module is on plug-in connection 1): off / module 2 / module 3 /
module 2+3
The setting is only effective if the ext. controller enable is set to on.
This enables additional enable signals to directly contribute to the controller control. If the
function module 2 + 3 has been selected, both enable signals must be received for the
controller to operate (AND linkage). It is not necessary to set the ext. controller enable of the
module that is to be used for the control to on.
Through selecting the module selection function one returns to configuration module
selection.
The second page of the conductive C module configuration menu is opened through
selecting page 2.
Conductive C
configuration page 2
The minimum duration for which the PID-controller remains activated can be adjusted
with the min. controller on-time function.
Value range: 0.1 sec to 30.0 sec
Default: 0.5 sec
The controller circle time function is used to specify the period at which the PID
controller carries out a new calculation of the pulse duration.
Value range: 1.0 sec to 300.0 sec
Default: 5.0 sec
NOTE
417101802_Anhang02_LF_konduktiv.doc
Conductivity Measuring Module (contact measurement)
It is recommended to establish an approximate ratio of 1/10 (min on-time/cycle
time), since the implemented PID controller has been tuned to this ratio.
A longer on-time may be required for large motors (pumps, circulation system)
since those motors operate for a longer period of time and can be protected in this
way.
- 33 - Rev.: 05-07/10