Functions Of Digital Inputs (4.3.7.1); Analog Inputs (4.3.8); Min. Duty (4.3.14.1); User-Defined Duty (4.3.14.3) - Grundfos CONTROL MPC Installation And Operating Instructions Manual

11.7.27 Functions of digital inputs (4.3.7.1)

Fig. 68 Functions of digital inputs
Description
In the displays 4.3.7.1, a function can be related to the digital
inputs.
Setting range
It is possible to select one function in each display:
Function Contact activated
Not used
Min. duty
Max. duty
User-defined duty
External fault
Dry-running protection
Flow switch
Reset of alarm
Emergency run
Pilot pump fault
Alternative setpoint 2
Alternative setpoint 3
Alternative setpoint 4
Alternative setpoint 5
Alternative setpoint 6
Alternative setpoint 7
See the relevant sections for further information about the
functions.
Generally, a closed contact activates the function selected.
Setting via control panel
1. Mark the Settings menu with
2. Mark Secondary functions with
3. Mark Digital inputs with
4. Select the digital input with
5. Select the desired function with
with .
The activation is indicated by a check mark in the box.
= Operating mode Min.
= Operating mode Max.
= Operating mode User-
defined
= External fault
= Water shortage
= Flow rate
= Reset alarms
= Operating mode
Emergency run
= Pilot pump fault
= Setpoint 2 selected
= Setpoint 3selected
= Setpoint 4 selected
= Setpoint 5 selected
= Setpoint 6 selected
= Setpoint 7 selected
.
or , and press
or , and press .
or , and press .
or , and activate it
Factory setting
Digital input Function
External start/stop. Open contact = stop.
DI1 (CU 351) [10]
Note: Input No 1 cannot be changed.
Monitoring of water shortage (dry-running
DI2 (CU 351) [12] protection). Open contact = water shortage
(if the system is supplied with this option).
Monitoring of water shortage requires a pressure
Note
switch connected to the Control MPC.

11.7.28 Analog inputs (4.3.8)

Fig. 69 Analog inputs
Description
In this display, the analog inputs of the Control MPC can be set.
Each input can be activated and related to a certain function.
As standard, the Control MPC has three analog inputs. If the
Control MPC incorporates an IO 351B module (option), the
number of analog inputs is 5.
In the display, all analog inputs are shown so that their physical
position in the Control MPC can be identified.
A redundant primary sensor can be fitted as back-up for the
primary sensor in order to increase reliability and prevent stop of
operation.
If two sensors are to be redundant, each must
Note
have a separate analog input.
Example
AI1 (CU 351) [51]:
AI1: Analog input No 1
(CU 351): CU 351
[51]: Terminal No 51
Setting range
In the display Analog inputs (4.3.8), the analog input to be set is
selected.
Setting via control panel
1. Mark the Settings menu with
2. Mark Secondary functions with
3. Mark Analog inputs with
4. Select the analog input with
.
.
or , and press
or , and press .
or , and press .
.
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