Grundfos CONTROL MPC User Manual

41
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:
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 or , and press .
3. Mark Digital inputs with or , and press .
4. Select the digital input with or , and press .
5. Select the desired function with or , and activate it
with .
The activation is indicated by a check mark in the box.
Factory setting
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.
Example
AI1 (CU 351) [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 or , and press .
3. Mark Analog inputs with or , and press .
4. Select the analog input with or , and press .
TM03 8972 4807
Function Contact activated
Not used
Min. duty = Operating mode Min.
Max. duty = Operating mode Max.
User-defined duty
= Operating mode User-
defined
External fault = External fault
Dry-running protection = Water shortage
Flow switch = Flow rate
Reset of alarm = Reset alarms
Emergency run
= Operating mode
Emergency run
Pilot pump fault = Pilot pump fault
Alternative setpoint 2 = Setpoint 2 selected
Alternative setpoint 3 = Setpoint 3selected
Alternative setpoint 4 = Setpoint 4 selected
Alternative setpoint 5 = Setpoint 5 selected
Alternative setpoint 6 = Setpoint 6 selected
Alternative setpoint 7 = Setpoint 7 selected
Digital input Function
DI1 (CU 351) [10]
External start/stop. Open contact = stop.
Note: Input No 1 cannot be changed.
DI2 (CU 351) [12]
Monitoring of water shortage (dry-running
protection). Open contact = water shortage
(if the system is supplied with this option).
Note
Monitoring of water shortage requires a pressure
switch connected to the Control MPC.
TM03 2356 4607
Note
If two sensors are to be redundant, each must
have a separate analog input.
AI1: Analog input No 1
(CU 351): CU 351
[51]: Terminal No 51

Grundfos CONTROL MPC Specifications

General

Brand	Grundfos
Model	CONTROL MPC
Category	Control Systems
Language	English