Danfoss MCX08M User Manual

Danfoss Electronics spa
Air Handling seq.- user manual
DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2
Produced by Danfoss Electronics spa Graphic Department, 10-2009
5
2| User interface
2.1| Keyboard
Key Function
Up
Down
Enter
Esc
Keys are used to access directly some special functions and to navigate through the user interface menu.
2.1.1| Direct access to special functions
for 1s: access the alarms screen (see “2.4.1] Displaying and managing alarms”).
for 3s: access the main setpoint (see “6.4] Main setpoint”).
for 1s: access the menu.
for 3s: switch between ON/OFF status (see “2.2] Turning the unit ON and OFF”).
2.1.2| Menu navigation
Press for 1s to access the menu. Use the and keys to navigate through the menu; pressing lets you
descend a level in the menu, if this is possible, and pressing lets you move up a level.
Use the following keys to modify the selected parameters: , to enter the modication mode, and to
modify the value, to conrm the modication and to abandon it without conrming.
2.2| Turning the unit ON and OFF
The instrument can be switched from OFF to ON and vice versa in the following ways:
pressing the key and keeping it pressed for 3s;
using the digital “ONF - ON/OFF” input, if present; remember, the digital input acts on the status change.;*
Note
* if, during the input
conguration phase, you set
“Polarity”=N.C., the unit is OFF
when the input is open;
from a Modbus supervisor through coil 129, (see “16.1] Table of exported variables”).
When OFF, the machine mode is indicated as OFF on the main screen.
Passing from OFF to ON turns on the main screen.
Activating of the digital and analog outputs is delayed, respectively, by the dOt and AOt times
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Danfoss MCX08M Specifications

General

Brand	Danfoss
Model	MCX08M
Category	Controller
Language	English

Summary

User Interface and Navigation

Alarms Management

Describes how to view and handle system alarms.

Parameter Access

Provides access to the system's configurable parameters.

Configuring the AHU Software

Configuration Overview

Outlines the main steps for adapting the AHU software to specific applications.

Input/Output Configuration

Lists and describes available analog and digital inputs/outputs for configuration.

Coils Control

Assigning Control Sequences

Defines the function and control sequence for each heating/cooling coil.

Coil Output Management

Sets how coil outputs are managed based on load demand.

Valve Control

Details valve types (ON/OFF, 0/10V, 3-points) and their corresponding outputs.

Step Control

Covers step control for coils, like electric resistances.

Pump Control

Manages pump operation for each coil, including delays and activation parameters.

Cooling Coil Defrost Control

Manages defrost sequences for cooling coils to prevent ice buildup.

Dampers and Energy Recovery Control

External and Mixing Dampers

Describes the control of external and mixing dampers.

Temperature Control Sequences

Damper Control Sequences

Configures sequences for managing dampers and energy recovery units.

Heat and Cool Control Sequences

Details the parameters for heat (HS1, HS2) and cool (CS1) control sequences.

Main Setpoint

Defines main setpoints for heating, cooling, humidity, and economy modes.

Frost Protection

Frost Prevention in OFF

Manages frost prevention when the unit is turned off.

Controlling the Supply Temperature Limits

Supply Temperature Lower Limit

Protects against excessively cold supply air by setting a lower limit.

Supply Temperature Upper Limit

Prevents condensation by setting an upper limit for supply air temperature.

Humidity Control

Humidifier Control

Configures the operation of humidifiers and their pumps.

Dehumidifier Control

Details the control of dehumidification using digital and analog outputs.

Controlling the Supply Humidity Limits

Alarms

Actions Following an Alarm

Parameters

Parameters Table

Appendix – Use of the Configurator

Guide to Modifying Application Software

Step-by-step instructions for modifying the AHU application software.

“Parameters" Page

"Alarms" Page

“Parameters_x_Model” Page

I/O Configuration Pages