Danfoss M2 Manuale utente

Monitoring, Control and Alarm System

Manual

Refrigeration and Air Conditioning Controls

REFRIGERATION AND AIR CONDITIONING

2 Manual RS.8A.N5.02 © Danfoss 10-2007 m2 Version 3.11

Contents

Introduction 3

Safety 3

System Overview 4

Alarms 4

Security 4

Battery Backup 4

External Connections 4

Technical data 5

Key Operation 5

Operation via the Key Pad 8

Point Overview 8

Point Detail 8

Inhibiting a Point 9

Point Oset 9

Single Point Log Printout 9

Graphics 10

Pulsed Input 10

Alarm Mode 11

Muting and Clearing an Alarm 11

Main Menu 11

Scan Mode 11

No Scan 11

Point Overview Scan 11

Point Detail Scan 12

Alarm History 12

Point Alarm List 12

Event History 12

Print Menu 12

Alarm History 12

Software Version 13

Setting the System Time and Date 13

Daylight Saving 14

Setup Information 14

Conguring the System via the Key Pad 15

Entering Characters in Edit Fields 15

Numeric Only Fields 15

Diacritic Entry 15

Setup Menu 15

Entering the Passcode 15

Setting Installation Name 15

Setting Temperature Units 16

Setting Date Format 16

Selecting a Point Number 17

Name 16

Setting the Point Type 16

Setting the Units of Measurement 17

Defrost Interlock Point 17

Setting the Alarm Settings 17

Setting the Alarm Action 17

Setting the Log Action 18

Setting the Graph Action 18

Point Setup (Screen 2) 18

Input Source 18

Remote Addr 18

Input Type 19

Input Number 19

Y Axis 19

Y Base 19

4 - 20mA Inputs 19

Pulsed Input Setup 19

Mode 19

Pls/kWh 19

Export 20

Pulsed Input Installation Notes 20

Resolution 20

Defrost Synchronisation 20

Password Setup 21

Point Oset Passcode Protection 21

Setting the Log/Chart Frequency 21

Alarm Action Setup 22

Output Name 22

Action n 22

Delay 23

Duration 23

Clear On 23

Modem Dialout Options 23

Dialout 24

Call Type 24

Number 24

Pager Info 25

Dening the Probe Curves 25

Setting up a Curve Table 26

4-20mA Set-up 26

Modem Conguration 27

Baud Rate 27

Dial 27

Answer 27

Language Selection 27

'AKM' Call Type 28

Maintenance 29

Cleaning 29

Service 29

Full Character Set 29

Alphanumeric Character Set 29

Remote Controller Parameters 30

Conguring The m2+ Via The Key Pad 30

Type 30

Input Source 30

Remote Addr 30

Input Type 30

Input Number 30

EKC 31

Alarm action setup 34

m2 Version 3.11 Manual RS.8A.N5.02 © Danfoss 10-2007 3

Introduction

The m2 has been developed to provide a comprehensive, yet

simple-to-use means of monitoring, recording and control

refrigeration temperatures and other aspects of refrigeration

plant operation. It is intended for use in small to medium

food storage operations (for example a small supermarket)

where compliance with the Food Hygiene Regulations is to be

demonstrated. A variety of ancillary control equipment may be in

use in such installations, each with its own specic requirements

in terms of interfacing and monitoring, and m2 can be congured

to work in such an environment.

Designed for operational simplicity, the system once congured

can display the status of each input point in turn with the

occurrence of any fault condition indicated immediately by

means of audible and visual alarms. Further details on any aspect

of the operation of the installation are available via the key pad.

In addition there is the ability for authorised personnel to make

adjustments to the control and/or monitoring settings. Historical

data is stored within the system and may be viewed or printed

on a regular basis. The data is accessible both on and o-site

via the external modem connection and alarm calls can also be

generated if required.

The following sections provide a description of m2, and

the remainder of the manual provides further detail on the

conguration, operation, and maintenance of the system. It is

recommended that the appropriate part(s) are studied before any

attempt is made to use the system.

Validity

This manual was made in 10 - 2007 and applies to m2 - Dual

Comms with software version 3.11.

Safety

To prevent accidents arising from improper handling, installation

or operation, please read this manual carefully.

4 Manual RS.8A.N5.02 © Danfoss 10-2007 m2 Version 3.11

System Overview The m2 consists of a central monitoring unit which can monitor up to 16

local sensors or inputs which are usually located adjacent to the equipment

in question for example specic refrigerated areas (chiller cabinets, freezers,

cold rooms), plant rooms or gas detectors, up to 99 EKC - controllers and 32

standard RS485 connections (128 1/4 loads) via the third party bus. The precise

layout and conguration of these sensors and controllers is specic to each

installation, and it is not necessary for a typical operator to be familiar with the

operation of the sensors.

The m2 provides audio and visual alarms whenever an input exceeds its pre-set

alarm levels. For night operation, the system can be pre-set to dial-out using a

digital dialler or via a modem whenever an alarm occurs.

Security is provided by having passcode access to the protected settings. In the

case of mains failure, an alarm is triggered after a delay. The system can be pre-

set to dial-out to an external telephone number if required.

The m2 will always FAIL SAFE (except for modem dailout).

The unit is provided with battery backup to continue historical logging during

a power failure. In this case, the display backlight will switch o but the display

will keep running. When an alarm occurs, the alarm siren and the red ashing

backlight will still operate. The backlight will ash red, once every 5 seconds

until the alarm is muted.

Note: When a mains failure lasts longer than 1 hour, the unit will cease historical

logging and stop alarm checking. However, all existing historical readings

remain in memory and are not lost.

The m2 can monitor up to a maximum of 99 points, including up to 99 EKC -

controllers, and or an additional 32 standard RS485 connections (128 1/4 loads)

via the third party protocol.

If hard copy details of the monitor readings is required, a parallel printer port is

provided which can be connected to an Epson compatible parallel printer.

An RS232 serial interface via a 9-way ‘D’ type connector is provided which

allows either a directly connected IBM compatible Personal Computer (PC) or a

Minitel to be connected for operational and conguration purposes or to allow

connection to a modem.

If a PC is connected either directly or via the modem, the alarms and monitor

readings can be read and the set-up details can be changed remotely,

using Danfoss Central Station software (refer to manual RS.8C.G for more

information).

This manual will simply cover the conguration and use of the m2 in

monitoring and controlling a refrigeration installation.

Alarms

Security

Battery Backup

External Connections

m2 Version 3.11 Manual RS.8A.N5.02 © Danfoss 10-2007 5

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1. Only NTC's or PT1000's can be used at a time.

2. The data collection capacity depends on the amount of memory installed in the m2

unit.

3. If a power failure lasts longer than one hour, the monitoring unit will stop the collection

of data and the alarm monitoring. Already collected data will remain intact.

The functions of the keys on the front panel of the m2 are described in the

following sections.

Main Functions

Use this key to acknowledge or reset the alarm and mute the siren. The red

‘ALARM’ backlight will stop ashing and remain steady. Any‘HIGH’or‘LOW’

alarm indication will also stop scrolling and remain steady.

Secondary Function

Operates as a shift key to give extended functions with other keys.

Main Functions

Use this key to select the main or previous menu from any other screen.

Secondary Functions

Cancels input data without storing in edit elds ('ESC' key).

Technical data

Key Operation

Alarm Mute Key

Menu Key

6 Manual RS.8A.N5.02 © Danfoss 10-2007 m2 Version 3.11

Print Key

Up Arrow Key

Down Arrow Key

Left Arrow Key

Right Arrow Key

Main Functions

Use this key to select the Print Menu, except when in Alarm/Event history

where it will directly print out a list.

Secondary Functions

Changes the Case/Sign in edit elds.

Main Functions

Use this key to scroll the highlight upwards on a menu screen. If the highlight

is positioned on the rst line of a menu, pressing this key will force the highlight

to the bottom of the menu. In addition, when a character entry eld has been

selected, this key is used to increment the displayed value in the entry eld.

Secondary Functions

Moves through the Point Detail screens, moves the cursor on the Overview

screen and zooms in on the Graph screen.

Main Functions

Use this key to scroll the highlight downwards on a menu screen. If the

highlight is positioned on the last line of a menu, pressing this key will force the

highlight to the top of the menu. In addition, when a character entry eld has

been selected, this key is used to decrement the displayed value in the entry

eld.

Secondary Functions

Moves through the Point Detail screens, moves the cursor on the Overview

screen and zooms out on the Graph screen.

Main Functions

Use this key to move the cursor to the left when a character entry eld has been

selected. In addition when an option has more than one screen associated with

it (e.g. Point Detail), use this key to display the previous screen.

Secondary Functions

Moves the cursor on the Overview screen and moves the Graph Cursor.

Main Functions

Use this key to move the cursor to the right when a character entry eld

has been selected. In addition when an option has more than one screen

associated with it (e.g. Point Detail), use this key to display the next screen.

Secondary Functions

Moves the cursor on the Overview screen and moves the Graph cursor.

Main Functions

Use this key to select an item from a menu or to enter a value and move the

cursor to the next entry eld ('↵' key).

Secondary Functions

Inhibits points, adds the Graph cursor to the Graph screen and selects points on

the Overview screen.

Enter Key

m2 Version 3.11 Manual RS.8A.N5.02 © Danfoss 10-2007 7

Multiple Key Functions

Operator/Equipment Safety

Backspace in edit elds.

Adjusts Screen Contrast.

Starts or Stops the Scanning Mode on the Point Detail or

Overview screen.

Diacritics (accented characters editing mode).

Sort and display alarms by point when in Point Detail

Screen.

This equipment is safe to operate as long as the instructions in this manual are

followed. High voltages are present inside the m2 and the front access panel

should not be opened while power is applied to the system.

Ensure that mains power is disconnected before any maintenance is carried

out. It is assumed that operators of the system will have adequate training on

its use. Danfoss accept no liability for loss or damage caused by misuse of the

equipment.

8 Manual RS.8A.N5.02 © Danfoss 10-2007 m2 Version 3.11

Operation via the Key Pad

Point Overview To view the status of all the points at the same time, select the Point Overview

option from the Main Menu. The Point Overview screen is displayed. This

screen shows each activated point as one of the following icons, depending on

the point condition.

- active point in normal condition - an inhibited point

- active point in an alarm condition - a point in defrost

- a point in defrost pulldown

Note: If there are more than 20 points in the system extra lines of points will be

displayed underneath the rst 20 points (up to a maximum of 99 points).

To select a point, the cursor box can be positioned around a point symbol by

using the ‘ ‘ or ‘ ‘ keys. As each point is selected the point number and its

current status/temperature is displayed in the window on the right hand side of

the screen.

When the Overview Scan mode is selected, the cursor will cycle round all the

activated points in turn, pausing for 3 seconds on each one so that the current

status may be read.

To display more details of a particular point, position the cursor box around the

point required and press ‘↵’. The Point Detail screen will be displayed.

Note: If a point has a local oset applied to it, this will be indicated by the

presence of the oset icon at the left of the Point Readout window.

To continuously view the status of a single point, either select the Point Detail

option from the Main Menu or select a point on the Point Overview and press

‘↵’. The Point Detail screen is displayed.

Use the ‘ ’ key to select the next point or the ‘ ’ key to select the previous

point. The point number is displayed in the upper left-hand corner of the

screen and the current status is displayed in large text in the centre of the

screen. The text and symbols displayed in the window on the right hand side of

the screen are as follows:

Indicates the upper alarm limit setting. When the of

the symbol is scrolling, it indicates that the upper alarm

limit has been exceeded.

Indicates the alarm delay in minutes. When the hand of

the clock rotates, it indicates that the point is in the alarm

condition and the delay has not yet expired.

Indicates the lower alarm limit setting. When the part

of the symbol is scrolling, it indicates that the lower alarm

limit has been exceeded.

Indicates the input point type.

this indicates whether the point has been setup for 'Local'

or 'Remote' alarms.

- Local - alarms are raised based on

m2 alarm settings.

- Remote - alarms are raised based on

controller alarm settings.

Point Detail

Inhibiting a Point

Point Oset

This area also displays 'inhibit', 'defrost' and 'pulldown' icons, if

the point has been setup for 'Local'.

- an inhibited point.

- a point in inhibit pulldown.

- a point in defrost.

- a point in defrost pulldown.

Note: If a point has a local oset applied to it, this will be indicated by the

presence of the oset icon located under the units indicator.

When the Detail Scan mode is selected, the display will cycle through all the

activated points in turn pausing for 3 seconds on each one so that the current

status may be read.

Press either the‘ ’ key or the ‘ ’ key to return to the Main Menu or the ‘ ’

key to display the historical graph data.

To inhibit a point so that it cannot create an alarm, select the required point and

press ‘↵’. The Conrm Inhibit Yes/No message is displayed. Use the ‘ ’ or ‘ ’

key to toggle the answer and press ‘↵’. When a point is inhibited a symbol is

displayed alongside the point type. To uninhibit a point repeat the operation.

If the alarm condition is exceeded on an inhibited point (i.e. Pull-down), then

the animated pull-down arrows will be displayed next to the inhibit symbol .

The inhibit function can be password protected. This can be congured by

accessing the 'Passcode Setup' screen.

Any points on the m2 can have an oset applied to the displayed readings to

compensate for cable runs loss etc. These osets are point specic and may

only be dened from the m2 keypad, although their value is readable when

accessing the unit remotely. Under normal circumstances these osets (if

required) will be entered at installation and should only be modied by Danfoss

personnel. Any point which has an oset active will display the oset icon on

both the Point Detail and Point Overview screens.

In the Point Detail screen, pressing the ‘ ’ key displays the Print Range option

box. Use the‘ ’, ‘ , ‘ ’ and ‘ ’ keys to enter the required value and the‘↵’ key

to move through each eld. Press the ‘ ’ key and the Printing in Operation

screen is displayed and the data is sent to the printer.

Single Point Log Printout

The format of the printout will be as shown:

To display an instant graph of the currently selected point, from the Point Detail

screen, press the‘ ’key. The chart is then displayed.

The default time scale for the data displayed depends on the sample rate set.

For example, a sample rate of 15 minutes will give a default time scale of 1 day.

To view historic data, press the ‘ ’ or ‘ ’ keys to page the graphic screens

(with no overlap). Pressing the ‘ ’ or ' ' keys scroll through each of the points

displaying the data graphs.

Press the ‘↵’to bring up the cursor, this can then be moved along left or right

displaying the reading and time for the cursor position in the top right hand

corner of the screen. In addition the screen will page left or right when the

cursor reaches the end of the display.

To zoom in or out press the ' ' or ' ' keys, this will display the following time

spans:

45 mins 12 hours 4 weeks

1.5 hours 1 day 12 weeks

3 hours 3.5 days 11 months

6 hours 1 week

To exit the zoom facility, remove the graph cursor by pressing '↵' again.

Pressing the ' ' key will then take you back to the Point Detail screen.

When a graph is displayed on the screen, pressing the ' ' key dumps the

graph to a directly connected printer (cursor must be removed rst).

A pulsed input function is available for accepting pulses from a power meter.

The pulsed input is displayed as shown which includes two values. The large

value is the ‘Rate’ and indicates either current kW usage (Const) once per

minute or the ‘Peak’ kW usage within the current sample period.

If the ‘Rate’current usage is displayed, this value will vary with the actual energy

consumed within the last minute. If the‘Peak’ usage is displayed, this will only

change if the usage in the last minute was greater than any other minute in the

sample period - hence it will show the highest or ‘Peak’ value. The ‘Rate’value is

stored by the m2 and will be displayed in the graph associated with this point.

The second smaller value will show the accumulated kWh used within the

current sample period. This value will increase over the sample period then

reset to zero at the end.

The ‘Pulsed Icon’ to the left of the display will change from to each time a

pulse is being received.

Graphics

Pulsed Input

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