700 P electronics module
Description
3.
37
The DIN contact can be used for the following functions:
•
Enabling of circulation reduction in conjunction with a filter
control
•
A visual signal “Water quality good/bad”.
•
It is possible to switch to ECO parameter via digital input 1 to 3
Please note
The function is only available if there is a Cl
2
, pH and ORP mea-
surement.
If there is no Cl-N measurement, the DIN function is provided with-
out Cl-N measuring value.
The DIN contact remains active in spite of “Controller STOP” as
long as the measuring values are within the DIN limits.
3.4.13
ECO mode
The 700 P electronics module offers several ways to switch to
ECO mode (see “ECO mode” on page 85). There is the option to
switch to a different setpoint (setpoint ECO), different control
parameters or to CEDOX mode.
If necessary, e.g. during the night, circulation is reduced, i.e. the
700 P electronics module, when in ECO mode, switches to ECO
parameter, ECO setpoint or if the relevant setting is realized, to
CEDOX mode. Flocculant dosing is also switched to ECO mode.
The setting for the ECO changeover is done with the menu field
"Input/Output - Digital Inputs" or "Cl2 Functions - ECO Mode." The
digital contacts DI1, 2, 3 or several internal functions can be con-
figured for the ECO changeover.
3.4.14
Safety functions
The safety functions integrated into the control unit are:
•
Safety deactivation if the circulation fails and/or if the dosing
tank signals that it is empty and also if the sample water sup-
ply fails
•
Dosing time monitoring and the feed time delay
•
Alarms
•
External STOP for all controllers
•
“Positioner closed” function in the event of a power failure
(only if positioner has external power supply)
•
Password protection on two levels
Содержание WALLACE & TIERNAN 700 P
Страница 1: ...WALLACE TIERNAN ELECTRONICS MODULE 700 P Version 1 31 and later INSTRUCTION MANUAL...
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