Danfoss m2 User manual

Monitoring, Control and Alarm System
m2
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
m2
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
+
+
OR
+
+
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).
or
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

m2 Version 3.11 Manual RS.8A.N5.02 © Danfoss 10-2007 9
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

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

m2 Version 3.11 Manual RS.8A.N5.02 © Danfoss 10-2007 11
In normal operation if no scan mode is selected, the m2 will revert to the Point
Overview screen.
When one or more alarms have been raised, the built-in siren will sound, the
backlight will ash red and the point(s) in alarm will pulse. If a parallel printer is
connected, the time, status and point details of the alarm will be printed.
If the ‘ ’ key is not pressed within the programmed time setting, the dial-out
relay can be programmed to automatically activate, sending a signal to the dial-
out equipment/security system if it is connected.
To stop the siren sounding and the red backlight ashing, press the‘ ’ key.
Check what the problem is by selecting the Point Detail screen for the point in
alarm and noting its present status and alarm settings. The fault will need to be
found and rectied before the alarm can be successfully cleared.
If there appears to be no problem, it could be that the fault has‘cleared itself’
(e.g. the temperature has since returned to an acceptable level). In this case,
the point will stop pulsing.
If there are no further faults on other points, the alarm status will be cleared.
To display the Main Menu, press the ‘ ’ key (repeat if necessary). To select
an option from the Main Menu, use the ‘ ’ or ‘ ’ key to position the highlight
over the required option and press ‘↵’ or ‘ ’. At the bottom of the menu there
are two ‘ ’ symbols which indicate more options.
To display these options, press the ‘ ’ key. When the highlight reaches the
bottom of the screen, the menu will be scrolled upwards to reveal the extra
options. Similarly, to re-display the rst two options, press the‘ ’ key. The
rst two options were described previously while the remaining options are
described in the following sections.
Note: Options which have a symbol alongside them are password
protected.
To select a scan mode, select the Scan Mode from the Main Menu. The Scan
Menu is displayed.
Use this menu to select a scan mode which will cycle the display through all the
active points. To select an option from the Scan Menu, use the ‘ ’ or ‘ ’ key to
position the highlight over the required option and press‘↵’. Once an option
has been selected, the Main Menu will be re-displayed. You can then select the
Point Overview or Point Detail option as appropriate.
The Point Overview or Point Detail screen can also be set to the appropriate
scan mode by displaying the relevant screen and pressing the‘ ’ and ‘ ’ keys
together. Pressing them together again deactivates the scan mode.
Use this option to switch o the scan mode. Once this option is selected,
no scanning will be performed on either the Point Overview or Point Detail
screens. The default screen will become the Point Overview screen.
Use this option to select the scanning mode for the Point Overview screen.
When this mode is selected, the cursor on the Point Overview screen will cycle
round all the activated points in turn, pausing for 3 seconds on each one so that
the current status may be read.
Alarm Mode
Muting and Clearing an Alarm
Scan Mode
Main Menu
No Scan
Point Overview Scan

12 Manual RS.8A.N5.02 © Danfoss 10-2007 m2 Version 3.11
Use this option to select the scanning mode for the Point Detail screen. When
this mode is selected, the display on the Point Detail screen will cycle through
all the activated points in turn pausing for 3 seconds on each one so that the
current status may be read.
To display the alarm history, select the Alarm History option from the Main
Menu. The Alarm List screen is displayed with the most recent alarm heading
the list.
Up to 999 latest alarms can be viewed.
Each alarm is given a number from 1 to 999 (restarting at 1 after the 999th) and
is time and date stamped. The description shows the information relevant to
each point. The two ‘ ’ symbols at the bottom of the screen indicate that the
list continues. The list can be scrolled up and down using the‘ ’ or ‘ ’ keys.
Press ‘↵’to display events with the alarms.
To display the alarm history for a point, select the point detail screen, then press
the and keys together. The Alarm List screen is displayed listing all alarms
for the selected point only.
To display the event history, select the Event History option from the Main
Menu. The Event List screen is displayed with the most recent event heading
the list.
The latest 100 events stored are viewed. The list can be scrolled up and down
using the ‘ ’ or ‘ ’ keys.
If a parallel printer is connected, a series of printouts can be initiated in
condensed mode. To perform a print operation, select the Print Menu option
from either the Main Menu or by pressing the‘ ’‘key on all screens except the
Alarm/Event List screens. In either case, the Print Menu screen is displayed.
Use this option to print the current status of all points.
Note: Only those points which have their log action set to ON will be printed.
Use this option to print an individual graph of each of the points in turn. From
the Print Menu, select the Graph of All Points option. The Select Period screen
will then appear. Use the ' ', ' ', ' ' and ' ' keys to enter the required value
and the '↵' key to move through each eld. The Printing in Operation screen is
displayed and the data is sent to the printer.
Note: Only those points which have their graph action set to ON will be printed.
Use this option to print a list of all the alarms and events. The Alarm/Event List is
printed showing the Alarm List followed by the Event List.
From the Print Menu, select the Alarm List option. The Select Period screen will
then appear. Use the ' ', ' ', ' ' and ' ' keys to enter the required value and
the '↵' key to move through each eld. The Printing In Operation screen is then
displayed and the data is sent to the printer.
Each alarm is given a number from 1 to 999 (restarting at 1 after the 999th) and
is time and date stamped. The description shows the information relevant to
each point.
Similarly, each event is time and date stamped and the description shows the
information relevant to each event.
Note: This operation may take considerable time and paper.
Point Detail Scan
Print Menu
Event History
Point Alarm List
Log of All Points
Graph of Selected Points
Alarm History
Alarm History

m2 Version 3.11 Manual RS.8A.N5.02 © Danfoss 10-2007 13
The various codes printed in the status (St) column are dened as follows:
ok No fault present
Alm Equipment fault
dEF Defrost
dEP Defrost pulldown - (only shown on display)
dFP Defrost pulldown - (only shown on printouts)
E Equipment (status ok)
Err Equipment (status alarm)
Flt Comms fault
Hi High alarm
Inh Inhibit
Low Low alarm
O The input is o
OVR Defrost overrun alarm
OC Signal over range
SC Signal under range
The various codes displayed in the printout Reason column are dened as
follows:
Aft.Def Alarm after defrost
Fault probe fault
> High value alarm greater than high alarm limit
< Low value alarm less than low alarm limit.
Use this option to display the units software and hardware details for reference.
To return to the Main Menu, either wait 1 minute or press any key.
To set the system time and date, select the Time / Date option from the Main
Menu. The Password request is displayed. Enter your User passcode (the
default passcode is WOODLEY or the Local passcode).
Use ‘ ’or ‘ ’ keys to cycle through the character list to the required value and
the ‘ ‘ or ‘ ‘ key to move the cursor left or right respectively. Then press ‘↵’to
move onto the next eld.
The system time and date are read from the internal clock. If these are incorrect
amend them as appropriate.
The Start Day and End Day settings are used to indicate the start and end of
trading. This allows the system to perform dierent operations depending on
the time of day.
For example, the system could be set up so that during the day only an audible
alarm is activated, whereas the system would dial-out at night.
Select each of the days in turn and type in or amend the times as required.
· Use the ‘ ’or ‘ ’ keys to cycle through the day of the
week and the special days.
· Set the Start and End day values.
· Set the date of any Special Days (dd/mm) (5 Special
Days maximum).
The Special Days are used to override the normal weekday start and end times.
Note: The Special Days will occur every year if they are not changed.
Software Version
Setting the System Time and Date

14 Manual RS.8A.N5.02 © Danfoss 10-2007 m2 Version 3.11
Setup Information
This facility is to set the automatic clock change for winter/summer time.
From the System Times Setup menu, use the ‘↵’ key to highlight the Daylight
Saving ‘ ’ symbol, then press the ‘ ’ key.
The Daylight Saving setup menu is then displayed. Use the‘ ’ or ‘ ’ keys to
scroll through the following options:
Mode - O - Daylight saving switched o.
Auto-US - American daylight saving time
settings.
Auto-EU - European daylight saving time
settings.
Manual - Times and oset can be manually set.
Time - The hour at which the change will take place.
Oset - The amount in hours the clock will change.
Use this option to print out all setup information. From the Print Menu, select
the Setup Information option. The Printing in Operation screen is displayed
and the data is sent to the printer.
Daylight Saving

m2 Version 3.11 Manual RS.8A.N5.02 © Danfoss 10-2007 15
Conguring the System via the Key Pad
Entering Characters in Edit Fields There are two types of character sets that are used in the m2 depending on
which edit eld has been selected:
Full Character Set
This is used in most of the edit elds. When the edit eld has been selected, the
characters within the set can be cycled through using the ‘ ’ or ‘ ’ keys. If the
‘ ’ key is pressed rst, it will start at ‘A’ and go forward through the character
set. If the ‘ ’ key is pressed rst, it will start at ‘z’ and go backwards through the
character set.
When a character has been selected, press either‘ ’ to move to the next space
or ‘↵’ to move to the next edit eld.
Alphanumeric Character Set
If the ‘ ’ key is pressed rst, it will start at ‘0’ and go forward through the
character set. If the ‘ key is pressed rst, it will start at ‘z’ and go backwards
through the character set.
By pressing the ‘ ’ or ‘ ’ keys, the eld is incremented or decremented. By
pressing the ‘ ’ or ‘ ’ keys you can skip across the unit elds to make entering
larger numbers easier.
If your language uses Diacritics (accented characters), the m2 provides the
facility to enter these both from the local keypad and remotely via PC. This
facility is language sensitive such that only Diacritics which are relevant to the
language active on the unit are available. The method of entry is to select a
base character as normal and then add the required accent, e.g. in French if an
‘é’ is required the procedure is to rst select‘e’as described above, then enter
Diacritic mode and select the acute accent ´. To enter a Diacritic mode on a
suitable character, hold down the ‘ ’ like a shift key and press the ‘ ’ key once.
This will add the rst available accent to your character, any more which are
available can then be selected by pressing the‘ and ‘ ’keys together. When
the required accent is displayed, simply moving on to the next character stores
this and cancels the Diacritic mode. If you move the cursor onto an already
accented character, the unit will automatically enter Diacritic mode allowing you
to change the accent. Diacritic mode may be manually cancelled by pressing the
‘ ’ and ‘ ’ once more.
To congure the system via the key pad, select the Setup Menu option from the
Main Menu.
To change any of the conguration information via the keypad, you must rst
enter the correct password. The default passcode is 291. However, this may
have been changed to a passcode which is site specic.
Enter in the password using the ‘ ’ or ‘ ’ keys to cycle through the character
list and the ‘ ’ or ‘ ’ key to move the cursor left or right respectively. When the
password is complete, press‘↵’.
The installation name is displayed on the Point Overview screen, the Alarm
History screen, the Event History screen and on the various printouts.
To set the installation name, select the Installation Name option from the Setup
Menu.
Numeric Only Fields
Diacritic Entry
Setup Menu
Entering the Passcode
Setting Installation Name

16 Manual RS.8A.N5.02 © Danfoss 10-2007 m2 Version 3.11
Setting the Point Details
Selecting a Point Number
Name
Setting the Point Type
Setting Temperature Units
Setting Date Format
Enter the installation name using the ‘ ’ or ‘ ’ keys to cycle through the
character list and the ‘ ’ or ‘ ’ key to move the cursor left or right respectively.
You can use the ‘ ‘ and ‘ ’ keys together to delete the character before the
cursor. When the installation name is complete, press ‘↵’, then ' ' to return
to the Setup Menu. Next time you display the Point Overview screen the
installation name will appear at the top of the screen.
The m2's temperature unit of measurement can be set to either fahrenheit or
centigrade. To select the temperature unit, press the '↵' key to move the active
eld box around the 'temperature units' eld, then use the ‘ ’ or ‘ ’ key to
toggle between fahrenheit and centigrade.
The date format of the m2 unit can be set to either 'DD/MM' or 'MM/DD'. To
select the date format required, press the '↵' key to move the active eld box
around the 'temperature units' eld, then use the‘ ’ or ‘ ’ key to toggle
between 'DD/MM' and 'MM/DD'.
To set up the details of an individual point, select the Point Setup option from
the Setup Menu. The Point Setup screen is displayed with the point number
displayed in the top left hand eld.
To select a dierent point number, use the ‘ ’ or ‘ ’ key. As each number is
selected, the settings for the selected point are displayed.
To set the name of an individual point, ensure that the cursor is on the correct
point number and press‘↵’. The cursor will move to the Name eld. Enter the
installation name using the ‘ ’or ‘ ’ keys to cycle through the character list
and the ‘ ’ or ‘ ’ key to move the cursor left or right respectively. A maximum
of 18 characters can be entered into this eld.
You can use the ‘ ‘ and ‘ ’ keys together to delete the character before the
cursor and ‘ ‘ to change case. When the installation name is complete, press
‘↵’. The edit box will move onto the next eld.
To set the point type, repeatedly press‘↵’ to cycle through the elds until the
Type eld is highlighted. The input type code refers to the input connected to
that point. This can be altered by using the‘ ’ or ‘ ’ keys to scroll through the
list of available types, which are dened as follows.
O No input connected
RTD PT1000 temperature probe (-100 to +100°C) PT1000 Version Only
PT1 Low temp. thermistor probe (-80 to 0°C) Thermistor Version Only
PT2 Standard thermistor probe (-40 to +40°C) Thermistor Version Only
PT3 High temp. thermistor probe (0 to +100°C) Thermistor Version Only
EKS EKS111 probe (-35 to +85°) PT1000 Version Only
Low Not applicable
Eno Equipment (normally-open)
Enc Equipment (normally-closed)
Dno Defrost interlock (normally-open)
Dnc Defrost interlock (normally-closed)
420 4-20 mA input*
Cf1 Programmable curve No.1 - input is cross-referenced
to a table held in memory.
Cf2 Programmable curve No.2 - input is cross-referenced
to a table held in memory.
Cf3 Programmable curve No.3 - input is cross-referenced
to a table held in memory.
Cf4 Programmable curve No.4 - input is cross-referenced
to a table held in memory.

m2 Version 3.11 Manual RS.8A.N5.02 © Danfoss 10-2007 17
Setting the Units of Measurement
Defrost Interlock Point
Setting the Alarm Settings
Ana Remote analogue input and m2+ units.
EKC EKC - Controllers
CTL Third Party Controllers
* The 4-20 mA input is passive. It requires an external 12-24 V isolated power
supply. Default settings are 0 to 100% (0=4mA and 100=20 mA). Zero and
full scale can be modied via the second Point Setup screen. Values can be
between -99 and 999. Applications of 4-20 mA can be for pressure tranducers,
temp, ow, humidity, level, etc.
To set the units of measurement, repeatedly press ‘↵’ to cycle through the elds
until the Units eld is highlighted.
Enter the units required using the ‘ ’ or ‘ ’ keys to cycle through the character
list and the’ ' or ‘ ’ key to move the cursor left or right respectively.
Note: This is a text eld only and does not eect the operation of the system. It
will not be available if DNO, DNC, ENO or ENC is selected.
You can use the ‘ ‘ and ‘ ’ keys together to delete the character before the
cursor and ‘ ‘ to change case. When the units have been set, press ‘↵’. The edit
box will move onto the next eld.
Select the point to be used for defrost as previously described. Use the ‘ ’ or
‘ ’ keys to alter the point type code, if necessary, to“Dno”(defrost interlock,
normally-open relay) or “Dnc” (defrost interlock, normally-closed relay).
Select the point to be interlocked to the defrost and repeatedly press ‘↵’ to
cycle through the elds until the Def Int Pt eld is highlighted. Use the ‘ ’ or ‘
’ keys to alter the point number to the defrost input.
For example, if probe 1 is a temperature probe and point 16 is a defrost input
contact, set 16 as the defrost interlock in probe 1’s settings.
Select the point as previously described. Repeatedly press‘↵’ to cycle through
the elds until the High eld is highlighted. Set this eld to set the value
at or above which an alarm will occur by using the ‘ ’ or ‘ ’ keys to cycle
through the character list and the ‘ ’ or ‘ ’ key to move the cursor left or right
respectively. When the high temperature alarm point has been set, press‘↵’.
The edit box will move onto the next eld.
Repeat the operation for the Low eld, to set the value at or below which an
alarm will occur. Press‘↵’ to move the edit box onto the next eld. Repeat the
operation for the Delay eld. Set the length of time (in minutes) that the fault
must be present before an alarm is raised.
Select the point as previously described, then repeatedly press ‘↵’ to cycle
through the elds until the Action eld is highlighted. The status display shows
the alarm action number. Use the ‘ ’or ‘ ’ keys to set the required alarm
actions. These alarm actions can then be set to carry out the desired functions.
For example, point number 3 could be set to have alarm action 1 which sets the
siren and dials out to a modem. Whereas, point number 4 could be set to alarm
action 2 which sets the siren, dials out to a pager as well as the modem, etc.
The alarm actions are as follows:
0 Turns the alarm o.
1 - 8 Sets alarm actions 1 to 8.
Setting the Alarm Action

18 Manual RS.8A.N5.02 © Danfoss 10-2007 m2 Version 3.11
Setting the Log Action
Setting the Graph Action
Log printouts are available for selected points on a timed or demand basis
via the print menu. When a log is printed only points with the log action eld
appropriately set will be output. The available settings are:
O Set this point to OFF if you do not want this point to be
shown on any log printouts.
Timed The point will be automatically logged after a specied
time delay.
Manual The point will be logged on demand only.
On Set this option to ON if you require this point to be
shown on the timed log printouts and also on log on
demand printouts.
Repeatedly press ‘↵’to cycle through the elds until the Log eld is highlighted.
Use the ' ' or ' ' keys to set the required log action and press ‘↵’ to move the
cursor onto the next eld.
Graph printouts are available for selected points on a timed or demand basis via
the print menu. When a graph is printed only points with the graph action eld
appropriately set will be output. The available settings are:
O Set this option to OFF if you do not want this point
graph to be shown on any graph printouts.
Timed The graph for this point will be automatically printed
after a the time specied in the Log/Graph Setup screen.
Manual The graph for the point will be printed on demand
only.
On Set this option to ON if you require a graph for this
point to be printed after the time specied in the Log/Graph
Setup screen and also on ‘graph on demand’ printouts.
Repeatedly press ‘↵‘to cycle through the elds until the Graph eld is
highlighted. Use the ' ' or ' ' keys to set the required graph action.
With the Graph eld highlighted, press and hold down the‘↵’ key until the
second Point Setup screen is displayed or press the ' ' in the point type eld.
The point number and name are the same as those described in rst Point Setup
screen and cannot be edited here.
Use this eld to specify whether the input is connected directly to the m2
master unit (Local), via a m2+ or third party controller (T-Party) or (Remote) via
a EKC controller (Echelon). The input source can be set by pressing the ‘ ’ or ‘
’ keys to the required option. By default the rst 16 points are programmed
to use the 16 local inputs. This conguration is not xed and may be changed.
Press the ‘↵’key to move onto the next eld.
If ‘T-Party’ has been specied for the Input Source, then this eld is used to
specify the remote address (refer to relavent controller manual or the m2
Instructions RI.8B.M for the m2+ units). If 'Echelon' has been specied for the
Input Source, then this eld is not accessible as it is set from the EKC controller.
Input Source
Point Setup (Screen 2)
Remote Addr

m2 Version 3.11 Manual RS.8A.N5.02 © Danfoss 10-2007 19
Input Type
Input Number
Y Axis
Y Base
4 - 20 mA Inputs
Use the ‘ ’or ‘ ’ keys to cycle through the character list to the required value
and the ‘ ’ or ‘ ’ key to move the cursor left or right respectively. Press the‘↵’
key to move onto the next eld.
Use the ‘ ’and ‘ ’ keys to cycle through the valid options as follows:
· RESISTOR Resistor input.
· CURRENT 4 - 20 mA input.
· DIGITAL Normally open or normally closed contacts (Contact).
· PT1000 PT1000
This eld is to specify the input number of the (Remote) third party controller or
m2+ unit.
Use the ‘ ’or ‘ ’ keys to cycle through the character list to the required value
and the ‘ ’ or ‘ ’ key to move the cursor left or right respectively. Press the‘↵’
key to move onto the next eld.
This eld refers to the overall size of the graph temperature range. Entering
zero selects the auto-scale option. Alternatively, enter the required range. The
range goes from the lowest graph point (Y Base value) to the highest graph
point. Use the ‘ ’, ‘ ’, ‘ ’ or '‘ ’ keys to enter the required value.
This eld refers to the lowest value the graph will show. This value should be
slightly lower than you expect the temperature to drop to. If auto scale in the Y
axis is selected this value is not used. Use the ‘ ’, ‘ ’, ‘ ’ or '‘ ’ keys to enter
the required value.
These values are used exclusively in conjunction with a standard 4-20 mA input
which can represent pressure, humidity, level, ow rate, or any other variable
which can produce a 4-20 mA output.
The value for the upper and lower limits can therefore represent % (RH), PPM,
bar or psi etc., depending on the medium being measured. A numerical
value for 4 mA (lower limit) and 20 mA (higher limit) is entered, and the m2
automatically scales the input for a gure proportional to the measurement.
Use the ‘ ’, ‘ ’, ‘ ’ and ‘ ’ keys to enter the required value.
Finally, press ‘ ’ to return to the Setup Menu.
To setup the pulsed input, from the Point Setup menu select ‘PLS’ in the Point
Type eld. All the remaining elds in ‘Screen 1’ of the Point Setup are the same
as normal.
In ‘Screen 2’ of the Point Setup there are a couple of extra elds added. These
are as explained below:
This eld is to set either the‘Constant’ or ‘Peak’ value to be used as explained
previously.
This eld is to set the amount of pulses that is to be recieved from the power
meter per kWh.
Pulsed Input Setup
Mode
Pls/kWh

20 Manual RS.8A.N5.02 © Danfoss 10-2007 m2 Version 3.11
If the Pulsed Input is being setup via Danfoss Central Station software, there is
an extra eld named ‘Export’ that can be used.
This eld is set if the points data is to be exported to AKM format for analysis by
Power Focus or similar software.
The m2 Pulsed Input requires a volt free contact or an open collector and the
pusle width must be a minimum of 80 mS.
The Pulsed Input will operate with either PT1000 or Thermistor m2 input
boards.
The resolution of the pulse data depends on the sample rate of the m2 – the
longer the sample rate, the greater the resolution, as well as the resolution of
the power meter being used.
For example:
If the power meter outputs ve pulses for every Kilo Watt Hour (KWh) and with
a current usage of 6 KW.
With an m2 sample rate of 3 minutes:
1 or 2 pulses received per 3 minute interval ((5 pulses x 6 KWh) / 60 minutes) x 3
minutes = 1.5
1 pulse x 0.2KW x 20 (for 1 hour) = 4 KW
2 pulses x 0.2KW x 20 (for 1 hour) = 8 KW
Resolution is 4. Values could either be 0, 4, 8, 12 etc.
With an m2 sample rate of 15 minutes:
7 or 8 pulses received per 15 minute interval ((5 pulses x 6 KWh) / 60 minutes) x 15
minutes = 7.5
7 pulse x 0.2KW x 4 (for 1 hour) = 5.6KW
8 pulses x 0.2KW x 4 (for 1 hour) = 6.4KW
Resolution is 0.8. Values could be 0, 0.8, 1.6, 2.4, 3.2, 4.0, 4.8, 5.6, 6.4 etc.
With the Peak option, the sample rate is 1 minute (though the storage rate is
whatever the m2 is set for) which gives a very poor graph resolution, this makes
the Peak value very inaccurate unless the power meter outputs many pulses
per KWh.
This option allows the coordinated defrost setup of a network of EKC
controllers. From the Setup Menu, select the Defrost Schedule option.
Use the ‘↵’ to highlight the eld to be modied. Use the‘ ’ and ‘ ’ keys to
scroll through the character or options list and the‘ ’ and ‘ ’ keys to move the
cursor left or right respectively.
Set the values as follows:
Number Set this to the point number required for the defrost
schedule.
Name Enter the name required for this defrost schedule (this is
the point name).
Mode Select either ‘Master’ or ‘Follows’ depending on whether the
controller being setup is a‘Main’or ‘Secondary’ controller. If
‘Master’ has been set, then the next eld becomes active in
which the controllers address needs to be entered.
Coordinate This eld only becomes active if‘Master’ is selected in the
previous eld. Select either ‘Yes’or ‘No’depending on if
the ‘Secondary’ controllers information is to be used for
end of defrost control.
Export
Pulsed Input Installation Notes
Resolution
Defrost Synchronisation