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