Danfoss AK-SM 720 User guide

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User Guide

Network control

AK-SM 720

ADAP-KOOL® Refrigeration control systems

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User Guide | Network control AK-SM 720

Contents

1. Introduction

Application ................................................................................................. 3

Principles ..................................................................................................... 4

2. Design of a controller

Module survey .................................................................................................... 7

Common data for modules ............................................................................9

Dimensions ........................................................................................................10

System manager AK-SM.......................................................................11

Extension module AK-XM 101A ........................................................13

Extension module AK-XM 102A / AK-XM 102B ............................15

Extension module AK-XM 204A / AK-XM 204B ............................17

Extension module AK-XM 205A / AK-XM 205B ............................19

Extension module AK-XM 107A .......................................................21

Extension module AK-OB 110 ............................................................23

Power supply module AK-PS 075 / 150 ..........................................24

Preface to design .............................................................................................25

Functions ...................................................................................................25

Connections .............................................................................................26

Limitations ................................................................................................26

Design of a System manager ......................................................................27

Ordering .............................................................................................................35

3. Mounting and wiring

Mounting............................................................................................................36

Wiring ..................................................................................................................37

4. Conﬁguration and operation

Installation in network...................................................................................39

Conﬁguration ....................................................................................................41

Connect PC ...............................................................................................41

Unlock the conﬁguration of the controllers .................................43

Clock function .........................................................................................44

Quick setup...............................................................................................45

Plants main data .....................................................................................46

Alarm relay on plant ..............................................................................47

Destinations to be communicated with ........................................48

Routing of alarms ...................................................................................49

Alarms from controllers .......................................................................51

Modem and IP settings ........................................................................52

Design some functions yourself .......................................................53

Alarms for boolean functions ............................................................54

AKC controllers on DANBUSS.............................................................55

Conﬁguration of inputs and outputs ..............................................57

Set alarm priorities .................................................................................58

Lock conﬁguration .................................................................................59

Check conﬁguration ..............................................................................60

Check of connections ....................................................................................61

Find the controllers on the network .........................................................62

Setup of controllers ........................................................................................63

Setup functions ................................................................................................64

Logs ......................................................................................................................65

Plant operations ...............................................................................................67

First start of system manager ......................................................................81

Check alarms ............................................................................................81

Lock conﬁguration of connections ..................................................82

Check level for safety ............................................................................83

Conclusion ................................................................................................83

5. Regulating function

Local data communication ..........................................................................85

Extern data communication ........................................................................86

Alarm handling ................................................................................................88

Plant controls ....................................................................................................90

Logs ......................................................................................................................94

Operation ...........................................................................................................96

Clock.....................................................................................................................97

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User Guide | Network control AK-SM 720

1. Introduction

Application

AK-SM 720 is a complete system manager to control data communication to ADAP-KOOL® Refrigeration Control Systems. The system unit makes it possible to transmit alarms and system functions to external receivers.

The main function of the system manager is to transmit alarms. It also contains the primary functions that the refrigeration system’s controllers can use to sub-optimise the individual refrigeration sites.

To mention some of the various functions brieﬂy:

• Alarm receiver

• Forward alarms

• Collect logs

• Schedules

• Defrost groups

• Light functions

• Energy-saving functions

• Design of Boolean functions

Examples

Here are a couple of examples where the system manager takes care of communication to other units.

Receive alarms and logs from the controllers in the application

Modem connection to the service company

Local data communication can be:

• LON RS 485

• MODBUS

• DANBUSS (this does, however, also require a protocol interface type AK-PI 200. Literature no. RS8EX)

• There is a maximum of 200 controllers on the data communication. A maximum of 120 units of the EKC incl. SLV, where there must be a maximum of 15 diﬀerent types and software versions.

• TCP/IP

External data communication can be:

• TCP/IP

• Modem

Operation must take place using:

• Service tool type AK-ST

The system unit can transmit alarms and logs to:

• System software type AKM

Retrieve functions from some controllers and forward them to others

User Guide | Network control AK-SM 720

Principles

The great advantage of this series of controllers is that it can be extended as the size of the plant is increased. It has been developed for refrigeration control systems, but not for any speciﬁc application – variation is created through the read-in software and the way you choose to deﬁne the connections. It is the same modules that are used for each regulation and the composition can be changed, as required. With these modules (building blocks) it is possible to create a multitude of various kinds of regulations. But it is you who must help adjusting the regulation to the actual needs – these instructions will assist you to ﬁnd your way through all the questions so that the regulation can be deﬁned and the connections made.

Controller

Top part

Bottom part

The controller is the cornerstone of the regulation. The module has inputs and outputs capable of handling small systems.

• The bottom part – and hence the terminals – are the same for all controller types.

• The top part contains the intelligence with software. This unit will vary according to controller type. But it will always be supplied together with the bottom part.

• In addition to the software the top part is provided with connections for data communication and address setting.

Advantages

• The controller’s size can “grow” as systems grow

• The software can be set for one or more regulations

• Several regulations with the same components

• Extension-friendly when systems requirements are changed

• Flexible concept:

- Controller series with common construction

- One principle – many regulation uses

- modules are selected for the actual connection requirements

- The same modules are used from regulation to regulation

Extension modules

If the system grows and more functions have to be controlled, the regulation can be extended. With extra modules more signals can be received and more relays cut in and out – how many of them – and which – is determined by the relevant application.

Examples

A regulation with few connections can be performed with the controller module alone

If there are many connections one or more extension modules have to be mounted

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User Guide | Network control AK-SM 720

Direct connection

Setup and operation of an AK controller must be accomplished via the “AK-Service Tool” software program.

The programme is installed on a PC, and setup and operation of the various functions are carried out via the controller’s menu displays.

Displays

The menu displays are dynamic, so that diﬀerent settings in one menu will result in diﬀerent setting possibilities in other menus.

A simple application with few connections will give a setup with few settings. A corresponding application with many connections will give a setup with many settings. From the overview display there is access to further displays for the compressor regulation and the condenser regulation. At the bottom of the display there is access to a number of general functions, such as "network overview", “time table”, “log function”, “alarms”, "plant control" and “service” (conﬁguration).

Data communication

The controller forwards the data communication to all of the connected controllers. It receives measurements from selected functions. The measurements are sent to other controllers, which use the value in the control function. The controller receives alarms from all connected controllers and forwards them to the deﬁned receivers.

Users

All users must be assigned a user proﬁle which either gives access to full operation or gradually limits the operation to the lowest level that only allows you “to see”.

Users are added and deﬁned in the menu item “Conﬁguration”/ ”Authorisation”.

User Guide | Network control AK-SM 720

Light-emitting diodes

A number of light-emitting diodes makes it possible to follow the signals that are received and transmitted by the controller.

Log

From the log function you can deﬁne the measurements you wish to be shown. The collected values can be printed, or you may export them to a ﬁle. You can open the ﬁle in Excel.

If you are in a service situation you can show measurements in a trend function. The measurements are then made realtime and displayed instantly.

n Power n Comm n DO1 n Status n DO2 n Alarm n DO3 n Service Tool n DO4 n LON n DO5 n RS485 n DO6 n LAN n DO7 n DO8 n Service Pin

Slow ﬂash = OK Quick ﬂash = answer from master in 10 min. after network installation Constantly ON = error Constantly OFF = error

Flash = Active alarm / not cancelled Constant On = Aktive alarm / cancelled

External communication

Network installation

Alarm

The display gives you an overview of all active alarms. If you wish to conﬁrm that you have seen the alarm you can cross it oﬀ in the acknowledge ﬁeld. If you want to know more about a current alarm you can click on it and obtain an information display on the screen.

A corresponding display exists for all earlier alarms. Here you can upload information if you need further details about the alarm history.

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User Guide | Network control AK-SM 720

2. Design of a controller

This section describes how the controller is designed.

The controller in the system is based on a uniform connection platform where any deviations from regulation to regulation is determined by the used top part with a speciﬁc software and by which input and output signals the relevant application will

Module survey

• Controller module – capable of handling minor plant requirements.

• Extension modules. When the complexity becomes greater and additional inputs or outputs are required, modules can be attached to the controller. A plug on the side of the module will transmit the supply voltage and data communication between the modules.

• Top part The upper part of the controller module contains the intelligence. This is the unit where the regulation is deﬁned and where data communication is connected to other controllers in a bigger network.

• Connection types There are various types of inputs and outputs. One type may, for example, receive signals from sensors and switches, another may receive a voltage signal, and a third type may be outputs with relays etc. The individual types are shown in the table below.

require. If it is an application with few connections, the controller module (top part with belonging bottom part) may be suﬃcient. If it is an application with many connections it will be necessary to use the controller module plus one or more extension modules. This section will give you a survey of possible connections plus assistance in selecting the modules required by your actual application.

• Optional connection When a regulation is planned (set up) it will generate a need for a number of connections distributed on the mentioned types. This connection must then be made on either the controller module or an extension module. The only thing to be observed is that the types must not be mixed (an analog input signal must for instance not be connected to a digital input).

• Programming of connections The controller must know where you connect the individual input and output signals. This takes place in a later conﬁguration where each individual connection is deﬁned based on the following principle:

- to which module

- at which point (”terminals”)

- what is connected (e.g. pressure transmitter/type/ pressure range)

Extension module with additional analog inputs

Controller with analog inputs and relay outputs.

Top part

Extension module with additional relay outputs and additional analog inputs.

The module with additional relay outputs is also available in a version where the top part is provided with change-over switches so that the relays can be overridden.

Extension module with analog output signals

User Guide | Network control AK-SM 720

1. Controller

Type Function Application

AK-SM 720 System manager Control data communication

2. Extension modules and survey of inputs and outputs

Type Analog

inputs

For sensors, pressure transmitters etc.

System manager 11 4 4 - - - - -

Extension modules

AK-XM 101A 8

AK-XM 102A 8

AK-XM 102B 8

AK-XM 204A 8

AK-XM 204B 8 x

AK-XM 205A 8 8

AK-XM 205B 8 8 x

AK-XM 107A 8

The following extension module can be placed on the PC board in the controller module. There is only room for one module.

AK-OB 110 2

On/Oﬀ outputs On/oﬀ supply voltage

Relay (SPDT)

Solid state Low voltage

(DI signal)

(max. 80 V)

High voltage (max. 260 V)

Pulse counter Low voltage (max 30 V)

Analog outputs

0 – 10 V DC For override of

Module with switches

relay outputs

3. AK operation and accessories

Type Function Application

Operation

AK-ST 500 Software for operation of AK controllers AK-operation

- Cable between PC and AK controller AK - Com port

- Cable between zero modem cable and AK controller AK - RS 232

Accessories Power supply modul 230 V / 115 V to 24 V DC

AK-PS 075 18 VA DC AK-PS 150 36 VA DC

Supply for controller

On the following pages there is data speciﬁc to each module.

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User Guide | Network control AK-SM 720

Common data for modules

Supply voltage 24 V DC/AC +/- 20%

Power consumption AK-SM 720 8 VA

AK-XM 101, 102, 107 2 VA

AK-XM 204, 205 5 VA

Analog inputs Pt 1000 ohm /0 °C Resolution: 0.1 °C

Pressure transmitter type AKS 32R / AKS 32 (1 – 5 V)

Voltage signal 0 – 10 V

Contact function (On/Oﬀ) On at R < 20 ohm

On/oﬀ supply voltage inputs Low voltage

Relay outputs SPDT

Solid state outputs Can be used for loads that are cut in and

0 / 80 V AC/DC

High voltage 0 / 260 V AC

AC-1 (ohmic) 4 A

AC-15 (inductive) 3 A

U Min. 24 V

out frequently, e.g. : rail heat, fans and AKV valve

Accuracy: +/- 0.5 °C

Resolution: 1 mV Accuracy +/- 10 mV Max. connection of 5 pressure transmitters on one module

Oﬀ at R > 2K ohm (Gold -plated contacts not necessary)

Oﬀ: U < 2 V On: U > 10 V

Oﬀ: U < 24 V On: U > 80 V

Max. 230 V Low and high voltage must not be connected to the same output group

Max. 240 V AC , Min. 48 V AC Max. 0.5 A, Leak < 1 mA Max. 1 AKV

Ambient temperature During transport -40 – 70 °C

During operation -20 – 55 °C ,

0 – 95% RH (non condensing) No shock inﬂuences / vibrations

Enclosure Material PC / ABS

Density IP10 , VBG 4

Mounting For mounting on panel wall or DIN rail

Weight with screw terminals Modules in100- / 200- / controller-series Ca. 200 g / 500 g / 600 g

Approvals EU low voltage directive and EMC require-

ments are complied with

The mentioned data applies to all modules. If data is speciﬁc, this is mentioned together with the module in question.

LVD tested according to EN 60730 EMC tested Immunity according to EN 61000-6-2 Emission according to EN 61000-6-3

User Guide | Network control AK-SM 720

Dimensions

The module dimension is 72 mm. Modules in the 100-series consist of one module Modules in the 200-series consist of two modules Controllers consist of three modules The length of an aggregate unit = n x 72 + 8

A power supply module is either 36 mm or 54 mm If there is space on the DIN rail, the power supply module can be positioned to the left of the system manager.

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User Guide | Network control AK-SM 720

System manager AK-SM

Function

There are several controllers in the series. The function is determined by the programmed software, but outwardly the controllers are identical – they all have the same connection possibilities: 11 analog inputs for sensors, pressure transmitters, voltage signals

and contact signals.

8 digital outputs, with 4 Solid state outputs and 4 relay outputs

Supply voltage

24 V AC or DC to be connected to the controller. The 24 V must not be retransmitted and used by other controllers as it is not galvanically separated from inputs and outputs. In other words, you must use a transformer for each controller. Class II is required. The terminals must not be earthed. The supply voltage to any extension modules is transmitted via the plug on the right-hand side. The size of the transformer is determined by the power requirement of the total number of modules.

The supply voltage to a pressure transmitter can be taken either from the 5 V output or from the 12 V output depending on transmitter type.

Data communication

The installation has to be made as mentioned in the separate instructions.

Address setting

When the system manager is conﬁgured, the address must be set in the range 1 to 10. 1 must always be used. If there are more than one, the rest must be set with addresses 2 to 10.

Service PIN When the address has been set, the software must know the setting. This is done by pressing the Service PIN button. The “Status” LED will ﬂash when acceptance is received.

Operation

The conﬁguration operation of the controller must take place from the software programme “Service Tool”. The program must be installed on a PC, and the PC must be connected to the controller via the network plug on the front of the unit.

Light-emitting diodes

There are two rows with LED’s. They mean: Left row:

• Voltage supply to the controller

• Communication active with the bottom PC board (red = error)

• Status of outputs DO1 to DO8

Right row:

• Software status

• Alarm when LED ﬂashes. Alarm acknowledged = constant light

• Communication with Service Tool

• Communication on LON

• Communication on MODBUS

• Communication on TCP/IP

• “Service Pin” switch has been activated

Address

Internal communication between the moduls: Quick ﬂash = error Constantly On = error

n Power n Comm n DO1 n Status n DO2 n Alarm n DO3 n Service Tool n DO4 n LON n DO5 n MODBUS n DO6 n LAN n DO7 n DO8 n Service Pin

Status on output 1-8

Slow ﬂash = OK Quick ﬂash = answer from master in 10 min. after network installation Constantly ON = error Constantly OFF = error

Flash = Active alarm / not cancelled Constant On = Active alarm / cancelled

External communication

Network installation

Keep the safety distance!

Low and high voltage must not be connected to the same output group

A small module (option board) can be placed on the bottom part of the controller. The module is described later in the document.

User Guide | Network control AK-SM 720

Point

Analog inputs on 1 - 11

Solid state outputs on 12 - 15

Relay or AKV coil fx 230 V AC

Pt 1000 ohm/0°C

Point 1 2 3 4 5 6 7 8 9 10 11

Type AI1 AI2 AI3 AI4 AI5 AI6 AI7 AI8 AI9 AI10 AI11

Signal Signal

type

S1 S2 Saux1

Pt 1000 Saux2 SSA SdA

24 and 25 used only when "Option board ﬁtted"

Terminal 15 & 27: 12 V max. 100 mA in total.

Terminal 16 & 28: 5 V max 100 mA in total.

Terminal 17, 18, 29, 30: (Cable screen)

Relay outputs on 16 - 19

Point 12 13 14 15 16 17 18 19

Type DO1 DO2 DO3 DO4 DO5 DO6 DO7 DO8

AKS 32R

3: Brown

2: Blue

1: Black

P0A P0B PcA PcB

AKS 32

3: Brown

2: Black

1: Red

...

On/Oﬀ Ext.

Main switch

Day/ Night

Door

AKV

Comp 1 Comp 2 Fan 1 Alarm Light Rail heat Defrost

Option Board

Please see the signal on the page with the module.

AKS 32R

-1 - xx bar

AKS 32

-1 - zz bar

0 – 5 V

0 – 10 V

Active at:

Closed

Open

Active at:

Oﬀ

Signal Module Point Terminal Signal type / Active at

1 (AI 1) 1 - 2

2 (AI 2) 3 - 4

3 (AI 3) 5 - 6

4 (AI 4) 7 - 8

5 (AI 5) 9 - 10

6 (AI 6) 11 - 12

7 (AI 7) 13 - 14

8 (AI 8) 19 - 20

9 (AI 9) 21 - 22

10 (AI 10) 23 - 24

11 (AI 11) 25 - 26

12 (DO 1) 31 - 32

13 (DO 2) 33 - 34

14 (DO 3) 35 - 36

15 (DO 4) 37 - 38

16 (DO 5) 39 - 41

17 (DO6) 42 - 44

18 (DO7) 45 - 47

19 (DO8) 48 - 50

24 -

25 -

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User Guide | Network control AK-SM 720

Extension module AK-XM 101A

Function

The module contains 8 analog inputs for sensors, pressure transmitters, voltage signals and contact signals.

Supply voltage

The supply voltage to the module comes from the previous module in the row.

Supply voltage to a pressure transmitter can be taken from either the 5 V output or the 12 V output depending on transmitter type.

Light-emitting diodes

Only the two top LED’s are used. They indicate the following:

• Voltage supply to the module

• Communication with the controller is active (red = error)

User Guide | Network control AK-SM 720

Point

Pt 1000 ohm/0°C

At the top the signal input is the left of the two terminals.

At the bottom the signal input is the right of the two terminals.

Signal Signal

S1 S2 Saux1 Saux2 SSA SdA

type

Pt 1000

Point 1 2 3 4

Type AI1 AI2 AI3 AI4

Point 5 6 7 8

Type AI5 AI6 AI7 AI8

Terminal 9 & 16: 12 V max. 100 mA in total.

Terminal 10 & 15: 5 V max 100 mA in total.

Terminal

11, 12, 13, 14:

(Cable screen)

AKS 32R

AKS 32

3: Brown

2: Blue

1: Black

3: Brown

2: Black

1: Red

P0A P0B PcA PcB

...

On/Oﬀ Ext.

Main switch

Day/ Night

Door

AKS 32R

-1 - xx bar

AKS 32

-1 - zz bar

0 – 5 V 0 – 10 V

Active at:

Closed

Open

Signal Module Point

1 (AI 1) 1 - 2

2 (AI 2) 3 - 4

3 (AI 3) 5 - 6

4 (AI 4) 7 - 8

5 (AI 5) 17 - 18

6 (AI 6) 19 - 20

7 (AI 7) 21 - 22

8 (AI 8) 23 - 24

Terminal

Signal type /

Active at

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User Guide | Network control AK-SM 720

Extension module AK-XM 102A / AK-XM 102B

Function

The module contains 8 inputs for on/oﬀ voltage signals.

Signal

AK-XM 102A is for low voltage signals. AK-XM 102B is for high voltage signals.

Supply voltage

The supply voltage to the module comes from the previous module in the row.

Light-emitting diodes

They indicate:

• Voltage supply to the module

• Communication with the controller is active (red = error)

• Status of the individual inputs 1 to 8 (when lit = voltage)

AK-XM 102A

Max. 24 V

On/Oﬀ: On: DI > 10 V AC Oﬀ: DI < 2 V AC

AK-XM 102B

Max. 230 V

On/Oﬀ: On: DI > 80 V AC Oﬀ: DI < 24 V AC

User Guide | Network control AK-SM 720

Point

AK-XM 102A: Max. 24 V AK-XM 102B: Max. 230 V

Signal Active at

Ext. Main switch

Day/ Night

Comp. safety 1

Comp. safety 2

Closed

(voltage on)

Open

(voltage oﬀ)

Point 1 2 3 4

Type DI1 DI2 DI3 DI4

Point 5 6 7 8

Type DI5 DI6 DI7 DI8

Signal Module Point Terminal Active at

1 (DI 1) 1 - 2

2 (DI 2) 3 - 4

3 (DI 3) 5 - 6

4 (DI 4) 7 - 8

5 (DI 5) 9 - 10

6 (DI 6) 11 - 12

7 (DI 7) 13 - 14

8 (DI 8) 15 - 16

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User Guide | Network control AK-SM 720

Extension module AK-XM 204A / AK-XM 204B

Function

The module contains 8 relay outputs.

Supply voltage

The supply voltage to the module comes from the previous module in the row.

AK-XM 204B only Override of relay

Eight change-over switches at the front make it possible to override the relay’s function. Either to position OFF or ON. In position Auto the controller carries out the control.

Light-emitting diodes

There are two rows with LED’s. They indicate the following: Left row:

• Voltage supply to the controller

• Communication active with the bottom PC board (red = error)

• Status of outputs DO1 to DO8

Right row: (AK-XM 204B only):

• Override of relays Light ON = override Light OFF = no override

AK-XM 204A AK-XM 204B

Fuses

Behind the upper part there is a fuse for each output.

Max. 230 V

AC-1: max. 4 A (ohmic) AC-15: max. 3 A (Inductive)

AK-XM 204B Override of relay

Keep the safety distance!

Low and high voltage must not be connected to the same output group

User Guide | Network control AK-SM 720

Point

Punkt 1 2 3 4 5 6 7 8

Type DO1 DO2 DO3 DO4 DO5 DO6 DO7 DO8

Signal Active at

Comp. 1

Comp. 2

Fan 1

Alarm

Oﬀ

Signal Module Point Terminal Active at

1 (DO 1) 25 - 27

2 (DO 2) 28 - 30

3 (DO 3) 31 - 33

4 (DO 4) 34 -36

5 (DO 5) 37 - 39

6 (DO 6) 40 - 42

7 (DO 7) 43 - 45

8 (DO 8) 46 - 48

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User Guide | Network control AK-SM 720

Extension module AK-XM 205A / AK-XM 205B

Function

The module contains: 8 analog inputs for sensors, pressure transmitters, voltage signals

and contact signals.

8 relay outputs.

Supply voltage

The supply voltage to the module comes from the previous module in the row.

AK-XM 205B only Override of relay

Eight change-over switches at the front make it possible to override the relay’s function. Either to position OFF or ON. In position Auto the controller carries out the control.

Light-emitting diodes

There are two rows with LED’s. They mean: Left row:

• Voltage supply to the controller

• Communication active with the bottom PC board (red = error)

• Status of outputs DO1 to DO8

Right row: (AK-XM 205B only):

• Override of relays ON = override OFF = no override

AK-XM 205A AK-XM 205B

max. 10 V

Fuses

Behind the upper part there is a fuse for each output.

Max. 230 V

AC-1: max. 4 A (ohmic) AC-15: max. 3 A (Inductive)

AK-XM 205B Override of relay

Keep the safety distance!

Low and high voltage must not be connected to the same output group

User Guide | Network control AK-SM 720

Point

Pt 1000 ohm/0°C

Signal Signal

type

S1 S2 Saux1

Pt 1000

Saux2 SSA SdA

Point 1 2 3 4 5 6 7 8

Type AI1 AI2 AI3 AI4 AI5 AI6 AI7 AI8

Terminal 9 & 21: 12 V max. 100 mA in total.

Terminal 10 & 22: 5 V max 100 mA in total.

Terminal 11, 12, 23, 24 :

(Cable screen)

Point 9 10 11 12 13 14 15 16

Type DO1 DO2 DO3 DO4 DO5 DO6 DO7 DO8

AKS 32R

AKS 32

On/Oﬀ

3: Brown

2: Blue

1: Black

3: Brown

2: Black

1: Red

P0A P0B PcA PcB

...

Ext. Main switch

Day/ Night

Door

Comp 1 Comp 2 Fan 1 Alarm Light Rail heat Defrost

AKS 32R

-1 - xx bar

AKS 32

-1 - zz bar

0 – 5 V 0 – 10 V

Active at:

Closed

Open

Active at:

Oﬀ

Signal Module Point

1 (AI 1) 1 - 2

2 (AI 2) 3 - 4

3 (AI 3) 5 - 6

4 (AI 4) 7 - 8

5 (AI 5) 13 - 14

6 (AI 6) 15 - 16

7 (AI 7) 17 - 18

8 (AI 8) 19 -20

9 (DO 1) 25 - 27

10 (DO 2) 28 - 30

11 (DO 3) 31 - 33

12 (DO 4) 34 - 36

13 (DO 5) 37 - 39

14 (DO6) 40 - 42

15 (DO7) 43 - 45

16 (DO8) 46 - 48

Terminal

Signal type /

Active at

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User Guide | Network control AK-SM 720

Extension module AK-XM 107A

Function

The module contains eight inputs for pulse counting. As an alternative, the input can be used to register an On/Oﬀ signal. (DI function).

Supply voltage

The supply voltage for the module comes from the previous module in the sequence.

LEDs

These indicate the following:

• Voltage of the module

• Communication with the controller is active (red = error)

(There is no LED indication for the individual signal inputs)

Signal

The signal is registered in accordance with DIN 43864. Rise times and fall times must be less than 5 ms. On and oﬀ times must be greater than 30 ms.

User Guide | Network control AK-SM 720

Point

Point 1 2 3 4

Type CI1 CI2 CI3 CI4

Point 5 6 7 8

Type CI5 CI6 CI7 CI8

Signal Active at

Puls - - -

Signal Module Point Terminal Active at

1 (CI 1) 1 - 2 - - 2 (CI 2) 3 - 4 - - 3 (CI 3) 5 - 6 - - 4 (CI 4) 7 - 8 - - 5 (CI 5) 9 - 10 - - 6 (CI 6) 11 - 12 - - 7 (CI 7) 13 - 14 - - 8 (CI 8) 15 - 16 - - -

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User Guide | Network control AK-SM 720

Extension module AK-OB 110

Function

The module contains two analog voltage outputs of 0 – 10 V.

Supply voltage

The supply voltage to the module comes from the controller module.

Placing

The module is placed on the PC board in the controller module.

Point

The two outputs have points 24 and 25. They are shown on the earlier page where the controller is also mentioned.

Max. load I < 2.5 mA R > 4 kohm

AO 0 – 10 V

Module

Point 24 25

Type AO1 AO2

AO2

AO1

User Guide | Network control AK-SM 720

Power supply module AK-PS 075 / 150

Function

24 V supply for controller.

Supply voltage

100 V AC to 240 V AC 50/60Hz

Placing

On wall or DIN-rail

Eﬀect

Type Output tension Output current Power

AK-PS 075 24 V DC 0.75 A 18 VA

AK-PS 150 24 V DC

(adjustable)

Dimension

Type High Width

AK-PS 075 90 mm 36 mm

AK-PS 150 90 mm 54 mm

1.5 A 36 VA

Connections

Supply to a System manager

AK-PS 075

AK-PS 150

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User Guide | Network control AK-SM 720

Preface to design

In most cases the system manager may be able to manage the control process without any kind of supplementary modules. Expansion modules will only be needed when measuring consumption, when using a large number of relays or when using Boolean functions.

Be aware of the following when the number of extension modules is being planned. A signal may have to be changed, so that an additional module may be avoided.

• An ON/OFF signal can be received in two ways. Either as a contact signal on an analog input or as voltage on a low or high-voltage module.

Functions

Clock function

Clock function and change-over between summer time and winter time are contained in the system manager. The clock’s setting is retained if there is a power failure.

Start/stop of regulation

Regulation can be started and stopped via the software. It cannot be stopped with a switch function.

Alarm function

If the alarm is to be sent to a signal transmitter, a relay output will have to be used.

System controls

Some of the possible system controls will require input signals or output signals.

• Weekly schedule with the store’s hours of business

If there has to be an override to “day”, a switch function will be required. If there has to be an override to “night”, a switch function will be required.

• An ON/OFF output signal can be given in two ways. Either with a relay switch or with solid state. The primary diﬀerence is the permitted load and that the relay switch contains a cutout switch.

Mentioned below is a number of functions and connections that may have to be considered when a regulation has to be planned. There are more functions in the controller than the ones mentioned here, but those mentioned have been included in order that the need for connections can be established.

• Light control

A signal can be received from two light sensors. Each sensor requires an analogue input. Up to eight zones can be controlled. Each zone will require a relay output or a triac output.

• Adaptive rail heat

A signal can be received from three dew point sensors. Each sensor requires two analogue inputs.

• Consumption measurement

When measuring consumption an expansion module must be used for pulse counting. A synchronisation signal will require an analogue or a digital input. A tariﬀ signal will require an analogue or a digital input. Two tariﬀ signals can be received.

• Peak load limitation

This function requires a signal from a consumption measurement. Up to ten relays can be connected.

• Weekly schedule for day/night operation

A switch signal will be required to override a schedule

• Weekly schedule for defrost

A switch signal will be required to override a schedule

• Weekly schedule for light

A switch signal will be required to override a schedule

• Inject ON function (closes the evaporator controls’ expansion valves in the event of operational problems with the compressors)

The function can be enabled via data communication or it can be wired outside the system manager

Data communication

The controller module has terminals for LON data communication. The requirements to the installation are described in a separate document.

User Guide | Network control AK-SM 720

Connections

In principle there are the following types of connections:

Analog inputs ”AI”

This signal must be connected to two terminals. Signals can be received from the following

sources:

• Temperature signal from Pt 1000 ohm

temperature sensor

• Contact signal where the input is short-

circuited or ”opened”, respectively

• Voltage signal from 0 to 10 V

• Signal from pressure transmitter AKS 32

or AKS 32R The supply voltage is supplied from the module’s terminal board where there is both a 5 V supply and a 12 V supply. When programming the pressure

transmitter’s pressure range must be set.

ON/OFF voltage inputs ”DI”

This signal must be connected to two terminals.

• The signal must have two levels, either 0 V

or ”voltage” on the input. There are two diﬀerent extension modules for this signal type:

- low-voltage signals, e.g. 24 V

- high-voltage signals, e.g. 230 V

When programming the function must be set:

• Active when the input is without voltage

• Active when voltage is applied to the

input.

ON/OFF output signals ”DO”

There are two types, as follows:

• Relay outputs All relay outputs are with change-over relay so that the required function can be obtained when the controller is without voltage.

• Solid state outputs Reserved for AKV valves, but output can cut an external relay in and out, as with a relay output. The output is only found on the controller module.

When programming the function must be set:

• Active when the output is activated

• Active when the output is not activated.

Analog output signal ”AO”

This signal is to be used if a control signal is to be transmitted to an external unit, e.g. a frequency converter. When programming the signal range must be deﬁned: 0 – 5 V, 1 – 5 V, 0 – 10 V or 2 – 10 V.

Pulse counter inputs

This signal must be used if consumption measurement is to take place.

Limitations

As the system is very ﬂexible regarding the number of connected units you must check whether your selection complies with the few limitations there are. The complexity of the controller is determined by the software, the size of the processor, and the size of the memory. It provides the controller with a certain number of connections from which data can be downloaded, and others where coupling with relays can be performed.

There must a maximum of 200 controllers on the data communication. A maximum of 120 units of the EKC type, where there must be a maximum of 15 diﬀerent types and software versions.

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• The sum of connections cannot exceed 80.

• The number of extension modules must be limited so that the total power will not exceed 32 VA (including controller).

• No more than ﬁve pressure transmitters may be connected to one controller module.

• No more than ﬁve pressure transmitters may be connected to one extension module.

User Guide | Network control AK-SM 720

Design of a System manager

Procedure:

1. Make a sketch of the system in question

2. Check that the controller’s functions cover the required application

3. Consider the connections to be made

4. Use the planning table. / Note down the number of connections. / add up

5. Are there enough connections on the controller module? – If not, can they be obtained by changing an ON/OFF input signal from voltage signal to contact signal, or will an extension module be required?

6. Decide which extension modules are to be used

7. Check that the limitations are observed

8. Calculate the total length of modules

9. The modules are linked together

10. The connection sites are established

11. Draw a connection diagram or a key diagram

12. Size of supply voltage/power supply

1. Sketch

Make a sketch of the system in question

User Guide | Network control AK-SM 720

2. System functions

Application

Control of data communication on the refrigeration system

Control of data communication for external operation

Forward alarms and data collected x

Local data communication

LON RS485 together with

- Controllers type EKC

- Controllers type AK

- Frequency converter type AKD MODBUS together with similar controllers that

have MODBUS communication TCP/IP together with other AK-SM x TCP/IP to AK-PI 200 and onwards to controllers

with DANBUSS Max. number of controllers (addresses) in a

network

External data communication

Via modem and phone net x Via TCP/IP and Internet x

200, although max. 120 EKC incl. SLV

User registration

User interface with Password and authorisation levels

History Event x

Operation

Via PC and software type AK-ST x

Clock

Clock function with battery backup x Resets the clock in the controllers after a power

failure

Safety

Communication control x Watchdog function with adjustable interval time x Data communication with "I'm a live" information x High level of security against undesired user

access

A bit more about the functions ("2" continued)

Alarm management

LOG of alarms x

Routing of alarms to Systemsoftware x

A relay can be deﬁned to an alarm relay x

System controls

Weekly schedule with the store’s hours of business x Weekly schedules with time speciﬁed in relation to

hours of business On/oﬀ control 5 Weekly schedules for use together with day/night

operation and start of defrost Override weekly schedules with a switch function 10 Switch between day operation and night opera-

tion

Defrost start

Coordinated defrost (common start after defrost) x Inject ON function (closes the evaporator controls’

expansion valves in the event of operational problems with the compressors)

P0-control 5 / 120 sections

Light control

Adaptive rail heat

Adaptive defrost

Consumption measurement 8

Load sheeding x

Synchronising signal x

max. 30 controllers

Max. 20 groups of

5 / 120 sections

2 light sensors,

8 relais, 8 zones

3 groups /

30 sections 10 groups /

30 sections

Here is a little more about some of the functions that must use an input or an output.

Modem connection

It is recommended that the supply voltage to the modem be provided through a relay, so that the system manager can start the modem in a controlled way.

The “Inject On” override function

This function closes expansion valves on evaporator controls when all compressors have stopped. The function can take place via data communication, or it can be wired via a relay output on the compressor control.

Boolean functions

A function in the system unit makes it possible to set up some logical functions. The functions can have both inputs and outputs. The function is described in a separate document. Please refer to literature sheet number RC8CA. This setup of Boolean functions should only be undertaken by trained personnel.

If you want to know more about the functions, go to chapter 5.

LOG

Stores LOG data from the connected controllers x

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User Guide | Network control AK-SM 720

3. Connections

Here is a survey of the possible connections. The texts can be read in context with the table on the next page.

Analog inputs

Temperature sensors

Up to 3 sensors for dew point measurement and 4 sensors for boolean logic can be connected.

Pressure transmitter

A pressure transmitter type AKS 32 or AKS 32R can supply signals to a maximum of ﬁve controllers.

Voltage signal

• 0 – 10 V

Used when signal is received from another control. E.g. signal from dew point sensor. (A dew point sensor delivers two signals – a temperature sensor signal and a voltage signal)

On/Oﬀ-inputs

Contact function (on an analog input) or Voltage signal (on an extension module)

• Switches to override a weekly schedule

• Switches to override light control

• Signal to register tariﬀ levels

Pulse counter input (on an expansion module)

• E.g. for energy registration

On/oﬀ-outputs

Relay outputs

• Voltage supply to modem

• Watch dog function

• Injection On function (signal to evaporator control. One each suction group)

• Alarm relay

• Light control

• Load sheeding

Solid state outputs

The solid state outputs on the controller module may be used for the same functions as those mentioned under “relay outputs”. (The output will always be “OFF” when the controller has a power failure).

Example

• AK-SM 720 is with data communication for EKC controllers

• Modem connection for alarm routing (for System software AKM)

• Modem connection for external operation (for Service tool)

• Alarm output

• Contact to reset alarms

• Energy measurement, which receives puls signal from extern unit.

Data from this example is used on the next page. The result is that the following modules should be used:

• AK-SM 720 controller

• AK-XM 107A pulse module

User Guide | Network control AK-SM 720

4. Planning table

The table helps you establish whether there are enough inputs and outputs on the system manager. If there are not enough of them, it must be extended by one or more of the mentioned extension modules.

Note down the connections you will require and add them up

Analog inputs

Temperature signal from dew point sensor (max. 3) Voltage signal from dew point sensor (max. 3) Voltage signal from a light sensor (max. 2)

Analog input signal

Example

On/oﬀ voltage signal

Example

On/oﬀ voltage signal

Example

Pulse module

Example

On/Oﬀ output signal

Example

Limitations

On/oﬀ inputs Con-

tact Contact for overriding of week schedule for day/night operation Contact to overriding of weekly schedule for light Pulse signal from meter for electr., gas, water etc. 1 On/Oﬀ signal about tariﬀ change Pulse pressure for stop of alarm 1

On/oﬀ outputs

Voltage supply for modem (reset function) 1 Alarm relay 1 Light zones (up to 8 relays)

5. Load sheeding limit (up to 10 relays)

6. Sum of connections 1 1 2 Sum = max. 80

Number of connections on a System manager 11 11 0 0 0 0 0 0 8 8

Missing connections, if applicable 0 - - 1 0

The missing connections to be supplied by one or more extension modules: Sum of power

AK-XM 101A (8 analog inputs) ___ pcs. á 2 VA = __ AK-XM 102A (8 digital low voltage inputs) ___ pcs. á 2 VA = __ AK-XM 102B (8 digital high voltage inputs) ___ pcs. á 2 VA = __ AK-XM 107A (8 pulse inputs) 1 ___ pcs. á 2 VA = __ AK-XM 204A / B (8 relay outputs) ___ pcs. á 5 VA = __ AK-XM 205A / B (8 analog inputs + 8 relay outputs) ___ pcs. á 5 VA = __

24 V 230 V

Pressure transmitters: Max. 5 each/ module

Boolean logic: There are limitations to the number of functions. Refer to separate document RC8CA.

1 pcs. á 8 VA = 8 Sum = Sum = max. 32 VA

Example: None of the 3 limitations are exceeded => OK

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User Guide | Network control AK-SM 720

8. Length

If you use many extension modules the controller’s length will grow accordingly. The row of modules is a complete unit which cannot be broken.

The module dimension is 72 mm. Modules in the 100-series consist of one module Modules in the 200-series consist of two modules

The controller consist of three modules The length of an aggregate unit = n x 72 + 8

or in an other way:

Module Type Number at Length

Controller module 1 x 224 = 224 mm Extension module 200-series _ x 144 = ___ mm Extension module 100-series _ x 72 = ___ mm

Total length = ___ mm

9. Linking of modules

Example continued: Controller module + Pulse module = 224 mm + 72 mm = 296 mm.

Start with the controller module and then mount the selected extension modules. The sequence is of no importance.

However, you must not change the sequence, i.e. rearrange the modules, after you have made the setup where the controller is told which connections are found on which modules and on which terminals.

The modules are attached to one another and kept together by a connection which at the same time transmits the supply voltage and the internal data communication to the next module.

Mounting and removal must always be performed when there is no voltage.

The protective cap mounted on the controller’s plug connection must be moved to the last vacant plug connection so that the plug will be protected against short-circuit and dirt.

When the regulation has started the controller will all the time check whether there is connection to the connected modules. This status can be followed by the light-emitting diode.

When the two catches for the DIN rail mounting are in open position the module can be pushed into place on the DIN rail – no matter where in the row the module is found. Removal is likewise carried out with the two catches in the open position.

User Guide | Network control AK-SM 720

10. Determine the connection points

All connections must be programmed with module and point, so in principle it does not matter where the connections are made, as

long as it takes place on a correct type of input or output.

• The controller is the ﬁrst module, the next one is 2, etc.

• A point is the two or three terminals belonging to an input or output (e.g. two terminals for a sensor and three terminals for a relay).

The preparation of the connection diagram and the subsequent programming (conﬁguration) should take place at the present time. It is most easily accomplished by ﬁlling in the connection

survey for the relevant modules. Principle:

Name On module On Point Function

fx Light 1 x x Close fx Light 2 x x Close fx Alarm relay x x NC fx Modem x x Close fx P0 x x AKS 32R 1-6 bar

The connection survey from the controller and any extension modules are uploaded from the paragraph "Modules". See later in the manual E.g. controller module:

Signal Module Point Terminal

1 (AI 1) 1 - 2

2 (AI 2) 3 - 4

3 (AI 3) 5 - 6

4 (AI 4) 7 - 8

Signal type /

Active at

Module Point

Mind the numbering. The right-hand part of the controller module may look like a separate module. But it isn’t.

- Columns 1, 2, 3 and 5 are used for the programming.

- Columns 2 and 4 are used for the connection diagram.

Example continued:

Signal

Pulse pressure to set oﬀ the alarm relay

Supply voltage to modem

Alarm relay for high priority alarms

Mod-

ule

10 (AI 10) 23 - 24

11 (AI 11) 25 - 26

12 (DO 1) 31 - 32

13 (DO 2) 33 - 34

14 (DO 3) 35 - 36

15 (DO 4) 37 - 38

16 (DO 5) 39 - 41

17 (DO6) 42 - 44

18 (DO7) 45 - 47

19 (DO8) 48 - 50

Point Terminal

1 (AI 1) 1 - 2

2 (AI 2) 3 - 4

3 (AI 3) 5 - 6

4 (AI 4) 7 - 8

5 (AI 5) 9 - 10

6 (AI 6) 11 - 12

7 (AI 7) 13 - 14

8 (AI 8) 19 - 20

9 (AI 9) 21 - 22

24 -

25 -

Signal

type /

Active at

OFF

Pulse signal

Signal

Mod-

ule

Point Terminal Active at

1 (CI 1) 1 - 2

2 (CI 2) 3 - 4

3 (CI 3) 5 - 6

4 (CI 4) 7 -8

5 (CI 5) 9 - 10

6 (CI 6) 11 - 12

7 (CI 7) 13 - 14

8 (CI 8) 15 - 16

- - -

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User Guide | Network control AK-SM 720

11. Connection diagram

Drawings of the individual modules may be ordered from Danfoss. Format = dwg and dxf.

You may then yourself write the module number in the circle and draw the individual connections.

Example continued:

The modem connection is made to this plug, but the plug is also used by AK-ST 500. So the modem plug can only be positioned when all settings in the system manager have been completed.

User Guide | Network control AK-SM 720

12. Supply voltage

Supply voltage is only connected to the controller module. The supply to the other modules is transmitted via the plug between the modules. The supply must be 24 V +/-20%. One power supply must be used for each controller. The transformer must be a class II. The 24 V must not be shared by other controllers or units. The analog inputs and outputs are not galvanically separated from the supply.

The + and – 24V input must not be earthed.

Example continued:

Controller module 8 VA Pulse counter module 2 VA

------

Size of power supply 10 VA

Power supply size

The power consumption grows with the number of modules used:

Module Type Number á Eﬀect

Controller 1 x 8 = 8 VA Extension module 200-series _ x 5 = __ VA Extension module 100-series _ x 2 = __ VA Total ___ VA

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User Guide | Network control AK-SM 720

Ordering

1. Controller

Type Function Application Language Code no.

AK-SM 720 System manager Control data communication

2. Extension modules and survey for inputs and outputs

Type Analog

inputs

On/Oﬀ outputs On/oﬀ supply voltage

(DI signal)

English, German, French, Dutch, Italian

English (UK), Spanish, Portuguese, English (US)

English, Danish, Swedish, Finnish

Analog outputs

Module with switches

080Z8511 x

080Z8512

080Z8513

Code no.

Example

continued

Example

continued

For sensors, pressure transmitters

Relay (SPDT)

Solid state Low voltage

(max. 80 V)

High voltage (max. 260 V)

Pulse counter

0 – 10 V DC For override

of relay outputs

With screw terminals

etc.

Controller 11 4 4 - - - - -

Extension modules

AK-XM 101A 8 080Z0007

AK-XM 102A 8 080Z0008

AK-XM 102B 8 080Z0013

AK-XM 204A 8 080Z0011

AK-XM 204B 8 x 080Z0018

AK-XM 205A 8 8 080Z0010

AK-XM 205B 8 8 x 080Z0017

AK-XM 107A 8 080Z0020 x

The following extension module can be placed on the PC board in the controller module. There is only room for one module.

AK-OB 110 2 080Z0251

3. AK operation and accessories

Type Function Application Code no.

Operation

AK-ST 500 Software for operation of AK controllers AK-operation 080Z0161 x

- Cable between PC and AK controller AK - Com port 080Z0262 x

- Cable between zero modem cable and AK controller AK - RS 232 080Z0261

Example

continued

Accessories Power supply module 230 V / 115 V to 24 V DC

AK-PS 075 18 VA, 24 V DC

AK-PS 150

36 VA, 24 V DC 080Z0054

Supply for controller

080Z0053 x

Modem Please use a modem from Danfoss’s approved suppliers list. x

User Guide | Network control AK-SM 720

3. Mounting and wiring

This section describes how the controller:

• Is ﬁtted

• Is connected

Mounting

Mounting of extension module on the basic module

1. Move the protective cap

Remove the protective cap from the connection plug on the righthand side of the basic module. Place the cap on the connection plug to the right of the I/O module that is to be mounted on the extreme right-hand side of the AK assembly.

We have decided to work on the basis of the example we went through previously, i.e. the following modules:

• AK-SM 720 controller module

• AK-XM 107A pulse counter module

In our example one extension module is to be ﬁtted to the basic module.

All of the subsequent setting are determined by the module positions. Here 1 and 2.

2. Assemble the I/O module and the basic module

The basic module must not be connected to voltage.

When the two snap catches for the DIN rail mounting are in the open position, the module can be pushed into place on the DIN rail – regardless of where the module is on the row. Disassembly is thus done with the two snap catches in the open position.

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User Guide | Network control AK-SM 720

Wiring

Decide during planning which function is to be connected and where this will be. Here are the tables for the example:

1. Connect input and outputs

Signal Module Point

Pulse pressure for stopping the alarm relay

Supply voltage to modem 16 (DO 5) 39 - 41 ON

Alarm relay for high priority alarms

1 (AI 1) 1 - 2

17 (DO6) 42 - 44 OFF

Terminal

Signal type/

Active at

Important

Keep signal cables away from cables with high voltages.

Signal Module Point Terminal Active at

Pulse signal

2 1 (CI 1) 1 - 2

- - -

2. Connect LON and MODBUS communication network

Check that data communication is terminated at either end

3. Connect supply voltage

Is 24 V, and the supply must not be used by other controllers or devices.

The two terminals must not be earthed.

4. Follow light-emitting diodes

When the supply voltage is connected the system manager will go through an internal check. The controller will be ready in just under one minute when the light-emitting diode ”Status” starts ﬂashing slowly.

5. When there is a network

Set the address and activate the Service Pin. See next

paragraph

6. The system manager is now ready for conﬁguration.

The installation of the data communication must comply with the requirements set out in document RC8AC.

Internal communication between the modules: Quick ﬂash = error Constantly On = error

n Power n Comm n DO1 n Status n DO2 n Alarm n DO3 n Service Tool n DO4 n LON n DO5 n MODBUS n DO6 n LAN n DO7 n DO8 n Service Pin

Status on output 1-8

Slow ﬂash = OK Quick ﬂash = answer from gateway in 10 min. after network installation Constantly ON = error Constantly OFF = error

Flash = active alarm/not cancelled Constant ON = Active alarm/cancelled

External communication

Network installation

User Guide | Network control AK-SM 720

4. Conﬁguration and operation

This section describes how the controller:

• Is conﬁgured

• Is operated

Plant example

We have decided to describe the setup by means of an example comprising a system manager and a number of controllers.

The example is the same as the one given in the "Design" section, i.e. the system manager and one extension module.

Controllers:

• The controllers are of types AK- and EKC

• They are connected in a LON network

• They transmit alarms to the system manager

We have decided to work on the basis of the example we went through previously. The example is shown overleaf.

Modem:

• The modem is a type from the positive list

• It is connected to the system manager (it cannot be connected

until the setup has been completed as it is the same plug that is used)

Operation:

• The setup is performed on the plant with PC and software

programme AK-ST

• After the setup operation can also take place via the modem and

AK-ST

Alarms:

• The alarm destination is System software type AKM at the

external modem

Alarm routing:

• To System software type AKM at the external modem

Controls:

• A table is set up for the shop’s opening hour

• Logs are collected in the system manager

• Logs are downloaded from the system manager with AKM

• Day/night hours for the refrigeration appliances are managed by

the system manager

• Defrost start is carried out by the system manager

• Consumption measurement (pulse signal is received from an

external unit)

• Switch to override the day/night schedule

• Switch (pulse pressure) to reset alarm

In the example the same modem will be used by both system software type AKM and by Service tool type AK-ST. This can only be achieved when it is possible to switch between the two operating interfaces, i.e. only one single destination is created.

If, however, it is not possible to switch, two destinations must be created, one for each modem.

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User Guide | Network control AK-SM 720

Installation in network

1. Set net number

In our example the system manager must have address 1. Turn the right-hand address switch so that the arrow will point at 1. The arrow of the two other switches must point at 0.

2. Push the Service Pin

The system manager will be the master of a number of controllers in a

network. The number of this network can be set between 1 and 10. In

any network there must always be a number 1 as number 1 will appear

as master and coordinate the communication if there are several system

managers on the same network.

Press down the service pin and keep it down until the Service Pin LED lights up.

3. Wait for answer

4. Carry out new login via Service Tool

A change of the setting of the switch will only take place after activation of the service pin button.

When the ”Status” light emitting diode starts ﬂashing faster than normal the network number has been installed. There will be a ﬂash every half second and change-back to slow ﬂashing again after some 10 minutes.

If the Service Tool was connected to the System manager while you installed it in the network, you must carry out a new login to the system manager via the Service Tool.

User Guide | Network control AK-SM 720

(If there are several network and with that several system managers)

If several system managers are linked up, the subsequent units must have network numbers 2 and up, but max. 10.

Communication between the system managers takes place via the TCP/IP network.

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User Guide | Network control AK-SM 720

Conﬁguration

Connect PC

PC with the program “Service Tool” is connected to the system manager.

The controller must be switched on ﬁrst and the LED “Status” must ﬂash before the Service Tool programme is started.

Start Service Tool programme

The AK Service Tool is mentioned at the beginning of the manual. For connection: please see AK-ST.

The ﬁrst time the Service Tool is connected to a new version of a controller the start-up of the Service Tool will take longer than usual while information is retrieved from the controller. Time can be followed on the bar at the bottom of the display.

Select the name SUPV and key in the passcode.

When the controller is supplied the SUPV access code is 123. When you are logged into the controller an overview of it will always appear.

When you are logged in on the system manager an overview of the connected controllers will always appear.

In this case the overview is empty. This is because the system manager and the controllers have not yet been set up.

The red alarm bell at the bottom right tells you that there is an active alarm in the system manager. In our case the alarm is due to the fact that the time has not yet been set.

The address is shown as 11:001.

This means that the master network is 11 and that this network is 1 (the master network will always be 11, and this cannot be changed).

Subsequently the overview will also show the connected controllers with their respective addresses. The illustration here has only been included for your information so that you can see that the network

number is 1.

User Guide | Network control AK-SM 720

Authorization

1. Go to Conﬁguration menu

Press the orange setup button with the spanner at the bottom of the display.

2. Select Authorization

When the controller is supplied it has been set with a standard authorization for diﬀerent user interfaces. This setting should be changed so it is adapted to the plant. You can change this now or later.

You will use this button again and again whenever you want to get to this display. On the left-hand side are all the functions not shown yet. There will be more here the further into the setup we go.

Press the line Authorization to get to the user setup display.

3. Change setting for the user ‘SUPV‘

4. Select user name and access code

Mark the line with the user name SUPV.

Press the button Change

This is where you can select the supervisor for the speciﬁc system and a corresponding access code for this person.

In earlier versions of the service tool AK-ST 500 it was possible to select the language in this menu. An updated version of the service tool will be released in the spring of

2009. If the controller is operated with the new version, language selection will happen automatically in connection with the conﬁguration of the service tool. The controller will utilize the same language that is selected in the service tool but only if the controller contains this language. If the language is not contained in the controller, the settings and readings will be shown in English.

5. Carry out a new login with the new user name and the new

access code

To activate the new settings you must carry out a new login to the controller with the new user name and the relevant access code. You will access the login display by pressing the padlock at the top left corner of the display.

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User Guide | Network control AK-SM 720

Unlock the conﬁguration of the controllers

1. Go to Conﬁguration menu

2. Select Lock/Unlock conﬁguration

3. Select Conﬁguration lock

Press the blue ﬁeld with the text Locked

The controller can only be conﬁgured when it is unlocked. It can only be adjusted when it is locked.

The values can be changed when it is locked, but only for those settings that do not aﬀect the conﬁguration.

(The conﬁguration lock blocks for all settings concerning the setup of

inputs and outputs as well as the setting of the IP address).

4. Select Unlocked

Select Unlocked and press OK.

User Guide | Network control AK-SM 720

Clock function

1. Go to Conﬁguration menu

2. Select Setup time and date

3. Time setting

Press in the blue ﬁeld with a setting. An auxiliary setting will now be shown. Press the ”PC” button and then ”OK” to transfer the PC’s times to the system manager. The system manager’s times will automatically be retransmitted to the individual controllers on the network.

A battery will protect the clock function if there is power failure. The working life of the battery is several years. The battery is checked continuously and an alarm will be given when it is time for a replacement. After a replacement the clock has to be reset.

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User Guide | Network control AK-SM 720

Quick setup

1. Go to Conﬁguration menu

2. Select Quick setup

3. Write neccessary data

4. Set data for the external recipient

In this menu the necessary settings have been gathered so that a simple alarm routing can be established. All settings will be transferred to other respective displays.

- Site name

- Receive alarms from controllers on network

- The language in which the alarms are to be received

- Select the alarms to be retransmitted to an external recipient

Press the OK button to gain access to the settings for the external recipient.

- Give the destination a name

- The connection to take place via a modem

- Write the phone number

- Write passcode

- Deﬁne that alarms are to be sent (next line a little further down on the screen)

- Deﬁne the alarm priorities that are to be sent (the next line a little further down in the display).

Setting Log Alarm relay selection Net-

Non High Low - High High X X X X 1 Middle X X X 2 Low X X X 3 Log only X Disabled

work

AKM dest.

User Guide | Network control AK-SM 720

Plants main data

1. Go to Conﬁguration menu

2. Select Local site setup

3. State main data

- Write the name (it will already be there if you entered it under ”Quick setup”).

- The name of the system manager will also be the same if you entered it under ”Quick setup”. You may overwrite the name if it is to be changed. (This is the name that will be shown in the general view of the plant).

- The two lines with ”Administrator access” may allow a user access that overrides the normal safety control. With the setting = “Yes” and password = “0”, Danfoss can access and then help in a service situation.

- Set Mains frequency

- The two settings Scanning the network and “Delete oﬄine controller” are intended for service situations. The scan function is the same as on the overview display (it can be activated later on in the setup). Once the scanning function has registered a controller on the network, it will remain on the overview display. Only by activating the function “Delete controller, there is no longer contact to”, can it be removed from the overview display.

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User Guide | Network control AK-SM 720

Alarm relay on plant

1. Go to Conﬁguration menu

2. Select Alarm relays

3. Here is a survey of alarm priorities

If the relay is to be activated by high priority alarms you must select the top line. Press the icon to proceed to the next page.

4. Set the alarm relay function

(The ”Mute alarm” operation on the bottom line can zeroset the alarm relay when it is activated).

- Set the ”Enable alarms” function

- Set that relay is to remain activated until the alarm is zeroset

- Set the max. activation time for the alarm relay.

The "High Alarm relay" is the only one that can be set to track alarm status, i.e. it is always triggered when an alarm sounds. Zero-set is not possible.

User Guide | Network control AK-SM 720

Destinations to be communicated with

1. Go to Conﬁguration menu

2. Select Destinations

3. Here is a survey of the plants that can be connected.

All contacts must have a preset destination. Both those that can be called and those that can call in to the system manager. This applies for contacts via both modem and TCP/IP.

In our example there is just one destination. It originates from the setting under ”Quick setup”.

The text "Destination 1" will be changed if you changed the text under "Quick setup".

4. Here is the destinations data

Set data for the network.

The name must be 100% identical with the recipient’s setting. (It is used for ID check-up).

Remember that if the system manager is to receive alarms from the connected units the setting ”yes” must be selected.

If changes need to be made in the set up, "Send alarms" must be set to "Disable" before changes can be made. Remember to reselect "Enable".

Use ”New” under point 3 if there are several networks to be communicated with.

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User Guide | Network control AK-SM 720

Routing of alarms

1. Go to Conﬁguration menu

2. Select alarm route

3. Here is the survey of alarm routes

An alarm route has earlier been set up - this happened under ”Quick setup”.

If more routes are required, the following menus must be used.

Correct name and settings for automatic setup route, if any.

(Only the system manager that is assigned address 1 can route alarms.)

You gain access to establish new routes via the ”New” button. If you

wish to make changes in an existing route it must be selected, and you

then continue with ”Change”.

The following displays show the possible settings.

4. Set data for the alarm route

Press the +-button to go on to the next page

Fill in/check data for the route

Priority options

All High only Middle only Middle and high Low and middle Disabled

There are several pages, one after the other. The black bar in this ﬁeld tells you which of the pages is currently displayed. Move between the pages using the + and - buttons.

User Guide | Network control AK-SM 720

5. Settings for the alarm route are continued here

Repeat points 1 to 5 if there are several alarm routes.

The third picture in the row that can be reached via the +- button is not used at the present time.

(The "Night" alarm route only becomes visible when you select a schedule under item 4.)

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User Guide | Network control AK-SM 720

Alarms from controllers

1. Go to Conﬁguration menu

2. Select the common alarm functions

3. Select setting for alarms

Set that alarms should be received from all the connected controllers.

The ”I’m alive alarm” function will report that there is connection between the plant and the alarm receiver.

User Guide | Network control AK-SM 720

Modem and IP settings

1. Go to Conﬁguration menu

2. Select modem setup

3. Check the commands for initiation of the modem.

4. If the system manager forms part of an IP network, the IP unit must also be set. Next line after Modem setup is IP setup. Press the line.

5. Check the settings for the IP setup

Normally, it is not necessary to change commands.

Select Dynamic if the address is assigned automatically from a router or a DHCP server. In connection with static address the address must be ordered from the local IT department..

If the system is to be called from AKM or from Service Tool, a “static address” must be used.

Selecting "Static" a line appears where you must set up an address for the IP gateway (the IP gateway address). (The systems manager uses port number 1041.)

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User Guide | Network control AK-SM 720

Design some functions yourself

1. Go to Conﬁguration menu

2. Select Boolean logic

3. Design a function on the network in the display.

In our example we have not used boolean logic. The pictures shown have only been included for your information.

Design of boolean functions should be left to specially trained staﬀ.

The application is described in a separate document RC8CA. In this document you will also ﬁnd the limitations in the number of functions.

Place the cursor in a ﬁeld and download a part function from the menu bar left

4. Activate the designed function(s) Press Run

User Guide | Network control AK-SM 720

Alarms for boolean functions

1. Go to Conﬁguration menu

2. Select Boolean alarms

3. Name and alarm text

In our example we have not used boolean alarms. The pictures

shown have only been included for your information.

Design of boolean functions should be left to specially trained staﬀ.

Give the deﬁned alarms a name and an alarm text.

Press the +-button to go on to the next page

4. Alarm priorities

Give the deﬁned alarms a priority.

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User Guide | Network control AK-SM 720

AKC controllers on DANBUSS

1. Go to Conﬁguration menu

2. Select Protocol Interface setup

In this example we do not have AKC controllers and therefore we do not use the function. This is only included for your information.

This function is only used if the system manager needs to exchange data with controllers of the type AKC which are controllers with DANBUSS data communication. Controllers can be accessed via protocol interface type AK-PI 200.

Installation and setup are described in the manual for AK-PI 200. Literature sheet number RS8EX.

User Guide | Network control AK-SM 720

Are there other inputs and outputs? — Any that must be used by system controls?

Here we have to interrupt the setup sequence to make the system manager display the functions in the system controls that require outputs and inputs. This takes place from page 67 onwards in points 1 to 56.

A “!” symbol is displayed by the settings that will require an input or output. If you want to use the function displayed, you must enable it.

You must only enable this setting – you must not implement the remaining settings for the control. These may only be set when there is contact to the controllers via data communication. (When there is contact, the system manager itself can recognise the function of the various controllers.) Once you have completed points 1-56, return here. We will then continue the setup process.

How to go to the settings discussed in points 1-56:

1. Go to the overview Press the blue overview button at the bottom left of the display

2. Proceed to plant operations

3. Once you have been through the system controls, you can

proceed to the next page with the section entitled “Conﬁguration of input and outputs”.

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User Guide | Network control AK-SM 720

Conﬁguration of inputs and outputs

1. Go to Conﬁguration menu

2. Select I/O conﬁguration

3. Conﬁguration of Digital outputs

Press the +-button to go on to the next page

The succeeding displays will depend on the earlier deﬁnitions. The displays will show which connections the earlier settings will require.

Load Output Module Point Active at

Modem reset DO5 1 16 ON

Alarm relay for high priority alarms

Enter module number and point number for each connections. We furthermore select for each connection whether the load is to be active when the output is in pos. ON or OFF.

Please disregard the depicted ”Boolean logic” functions. They have only been shown for your information. This also applies to the boolean functions that are shown on the next page.

DO6 1 17 OFF

4. Conﬁguration of other input and output

Function

Stop of alarm (pulse pressure)

A contact function with pulse pressure is connected. The function stops the alarm relay. In our example no further functions have been selected, but if it had been a matter of overriding with a switch function of a day/night schedule or a defrost schedule, this is where the input would have to be deﬁned.

Pulse counter input At present this function is not deﬁned, so no space has been assigned for module number and point number. The “Controls” will be deﬁned later. You can either skip forward and deﬁne the control (page 80) or you can continue and then return here to set the module number and point number.

Input/ output

AI1 1 1

Module Point Active at

User Guide | Network control AK-SM 720

Set alarm priorities

1. Go to Conﬁguration menu

2. Select alarm priorities

3. Set priorities

Very many functions have an alarm connected. Your choice of functions and settings has connected all the relevant alarms that are current. They will be shown with text in the three pictures. All alarms that can occur can be set for a given order of priority:

• ”High” is the most important one

• ”Log only” has lowest priority

• ”Disconnected” gives no action The interdependence between setting and action can be seen in the table.

Setting

High X X X X 1

Medium X X X 2

Low X X X 3

Log only X

Disconnected

Log Alarm relay selection Net-

Non High Low - High

work

AKM dest.

In our example we select the settings shown here in the display

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User Guide | Network control AK-SM 720

Lock conﬁguration

1. Go to Conﬁguration menu

2. Select Lock/Unlock conﬁguration

3. Lock Conﬁguration

Press in the ﬁeld against Conﬁguration lock. Select Locked. Press OK. The setup of the controller has now been locked. If you subsequently want to make any changes in the controller’s setup, remember ﬁrst to unlock the conﬁguration.

The system manager will now make a comparison of selected functions and deﬁne inputs and outputs. The result can be seen in the next section where the setup is controlled.

User Guide | Network control AK-SM 720

Check conﬁguration

1. Go to Conﬁguration menu

2. Select I/O conﬁguration

This control requires that the setup is locked.

Here we check that the ﬁelds look correct.

3. Check conﬁguration of Digital Outputs

Press the +-button to go on to the next page

4. Check conﬁguration of other inputs and outputs

In our case the setup of the output to the modem has returned to 0-0 for module and point number. This may be due to the following: A selection has been made of a combination of module number and point number that does not exist or will create a conﬂict. Fx the selected point number on the module had been set up for something diﬀerent. The error is corrected by setting up the output for the modem correctly. In our case to module 1 point 16.

Remember that the setup must be unlocked before you can change module and point numbers.

(If one of the ﬁelds go red it means that the function which used to require a connection has been opted out again. By setting module and point number in pos. 0, the connection is also opted out.)

The shown “Boolean logic” functions are not used.

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User Guide | Network control AK-SM 720

Check of connections

1. Go to Conﬁguration menu

2. Select I/O status and manual

3. Check of Digital Outputs

Press the +-button to go on to the next page

4. Check the other inputs and outputs

Before the system manager is started we check that all inputs and outputs have been connected as expected.

Here we check whether the inputs and outputs are working.

This control requires that the setup is locked.

By means of the manual control of each output it can be checked whether the output has been correctly connected.:

AUTO The output is controlled by the system manager

MAN OFF The output is forced to pos. OFF

MAN ON The output is forced to pos. ON

The illustrations is for your information.

User Guide | Network control AK-SM 720

Find the controllers on the network

1. Go to the overview Press the blue overview button at the bottom left of the display.

2. Scan the network

Press the scan-button

3. Await the scanning

4. Show result

Press Update button

All controllers on the LON network and MOD-bus network can

be be seen in the overview.

All controllers on the data communication must have an address set before this point is carried out. There must not be two controllers with the same address. If there are, only one of them will be registered. There may be up to 200 addresses on the LON and MOD connection.

There can however be max. 100 on the MOD bus connection.

Press the +-button to go on to the next page where the IP network is shown.

Both LON network, MOD-bus network and IP network will be scanned now.

The system manager scans the network and whenever it ﬁnds a controller it will send a conﬁrmation to the respective controller – the controller’s display will ﬂash with the registered address. After about ﬁve minutes the display will return to normal.

If you want to change the name of the controller to something more user-friendly, select the controller and then press “Change”.

All the registered controllers can be seen in the two displays.

The ﬁnal screen in the sequence contains data for the system manager.

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User Guide | Network control AK-SM 720

Setup of controllers

From the system manager

1. Go to the overview Press the blue overview button at the bottom left of the display..

2. Select controller

Press one of the controller symbols in the left-hand column.

There is now access to all the connected controllers. If they have not already been set up individually it can be done via data communication from the system manager, or the modem may be cut in and the setup can then take place via the modem communication.

If this symbol is shown the controller falls oﬀ the network. Check the

data communication.

Here are a couple of examples of the information that can appear if the connection to the controller cannot be created.

3. Perform the settings!

When you have made the settings in the controller you proceed to the next controller or return to the system manager via the survey.

From modem connection

1. The modem is cut in as shown on page 83, 84. Settings can now be made as explained above.

User Guide | Network control AK-SM 720

Setup functions

Schedule for shop’s opening hours

1. Go to the overview

2. Move on with the schedule

3. Create a schedule

A schedule must be established that indicates the shop’s opening hours. The schedule is later to be used in connection with day/night operation of refrigeration appliances. (The day/night changeover can be set relative to this schedule. A later change of opening hours will merely require an adjustment in this schedule.)

Shown here is the ﬁnal result when the schedule has been set.

4. Setup the schedule

Press the +-button to go on to the next page

5. Special days

Press a weekday and set the times for the day period.

Move on with the other weekdays

In this display we enter the days of the year where the the shops opening hours deviate from normal.

If there are special days where the shop is open outside of the earlier deﬁned schedule, they may also be entered here. The opening hours must then also be deﬁned.

If these days recur year after year they can be marked accordingly.

The underlying picture of the time setting looks like this: The period is indicated as ”from one date” – ”to another date” (both days being inclusive). If the period comprises whole closing days, the settings for ”opening” and ”closing time” must be set at the same hour. The value does not matter.

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User Guide | Network control AK-SM 720

Logs

1. Go to the overview

2. Move on to the Log function

3. Select ”New”

The log display will now show one line for each of the deﬁned logs. The deﬁnition takes place via the ”New” knob, or an existing log may be selected whereupon you press ”Change”. The showing of the measured data is placed behind each log icon.

Log extraction may take place once the clock has been set.

Setup the functions:

- Give the Log a name

- Select the address from which the data are to be downloaded.

- Continue by deﬁning the log type and how often collection is to be made. It is recommended that a food safety log lasts 15 min. or more. A service log can be less than 15 min. It depends what is being logged.

- The time period is the time during which the measurement is to be accessible in the system manager. After this time period it will be overwritten.

Press the +-button to go on to the next page

4. Select measurements

Press the +-button to go on to the next page,

where the measurement has to be selected.

The ﬁnal result is shown here when the measurements have been selected.

User Guide | Network control AK-SM 720

5. Select the section and then the measurement

6. Start the collection Change the setting ”Stopped” to ”Started”.

After the selection you may press the minus button to see what has been selected.

Or you may press the plus button to move to the start display.

If you want to create similar logs in a series of identical controllers, you can use the copy function in the bottom right-hand corner.

7. If several logs have to be established, points 3 to 5 must be

repeated.

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User Guide | Network control AK-SM 720

Plant operations

1. Go to the overview

2. Proceed to plant operations

The display will now show one line for each of the general operations.

Behind each icon there will be a number of displays with the diﬀerent

settings. It is all these settings we will be going through.

3. Select schedules

4. Create a schedule Press ”New”.

Schedules

Schedules set up via this operation can be used for day/night signal. The signal is transmitted via the data communication to selected controllers.

(We have earlier set up a schedule for the shop’s opening hours. The function of the schedule in this section can be seen as an extra schedule or a schedule for another control. If the schedule for the shop’s opening hours is adequate, this schedule can be dispensed with).

(The ﬁnal result is shown here when the schedule has been set up.)

We select ”Relative” because the schedule has to relate to the schedule for the shop’s opening hours. We select the schedule times to be 30 minutes before opening hours and 40 minutes after opening hours.

— !

! If you enable this function, a line will automatically be created and

reserved in the I/O conﬁguration. The line will contain the name of the function. In this line you must set a Module Number and a Point Number. See also page 56 onwards.

User Guide | Network control AK-SM 720

5. Give the schedule a name

6. Select schedule type

Press the +-button to go on to the next page

7. Check the schedule

Press the +-button to go on to the next page

At ”Relative” there are no settings.

The system manager combines the opening hours with the set hours

from the preceding display.

In the display you can see the start and stop times directly.

8. Other closing days

9. If there are several schedules, repeat points 3 to 8.

At ”Relative” there are no settings. This follows the schedule for the store’s hours of business.

User Guide | Network control AK-SM 720

10. Return to the overview display Press the plant control button.

11. Select On/Oﬀ control

12. Setup a new ON/Oﬀ group Press ”New”.

On / Oﬀ

The groups that are set up via this control can collect signals from one On/Oﬀ function in any controller on the network. This signal is then forwarded to another On/Oﬀ function on the network.

A maximum of 5 groups may be setup.

13. Deﬁne where the reading is to be collected. Press ”New”.

Give the group a name

The function can be stopped or started. When the function has been started, it will follow the reference signal but only in the “AUTO” position. If the receiver function needs to be force controlled, the setting must be set to “Manual On” or to “Manual Oﬀ”.

The signal can be inverted.

Select the required reference parameter

Only an On/Oﬀ function can be selected as a reference.

When the OK button has been pressed, the function reference can be

seen at the bottom of the display.

Only one reference can be chosen per group.

User Guide | Network control AK-SM 720

Press the +-button to go on to the next page

14. Deﬁne what the signal is to activate

Up to 30 signal receivers can be selected.

15. Press “New” and then select the parameter

16. If you wish to setup more groups of On/Oﬀ controls, repeat points 12-15.

17. Return to the overview.

Press plant operations.

18. Select day/night control

When the OK button has been pressed, the function receiver can be seen in the previous display.

A receiver can only receive override signals from one group. It should not to be selected for other groups as well. If this happens the last setup will be replaced.

NOTE! Selecting a receiver should only be carried out by trained personnel. Only On/Oﬀ functions can be selected for receivers. It is possible to select other functions but it can lead to disastrous setting errors.

Day / Night

Groups established via this operation receive the day/night signal at the same time. Activation of the signal either takes place from a schedule and/or from a switch.

(The ﬁnal result is shown here when the group has been set up.)

19. Setup a new day/night group

Press ”New”.

User Guide | Network control AK-SM 720

— !

Press the +-button to go on to the next page

Give the group a name.

Do not start the function until it has been deﬁned.

(Manual mode is an override function)

Select which schedule the control has to follow

! If you enable this function, a line will automatically be created and

reserved in the I/O conﬁguration. The line will contain the name of the function. In this line you must set a Module Number and a Point Number. See also page 56 onwards.

20. Press ”Select”

21. The controllers that are to belong to the group are marked here.

Here you can see the controllers that receive the day/night signal. The picture to the left shows the ﬁnal result. The three controllers in the next display have been selected earlier.

Controllers can only be selected if the function is stopped in the previous screen.

Only controllers with day/night function are displayed in the screen. A controller should only be included in one single day/night group.

Finish with ”OK.

22. If several groups of day/night controls are to be established, points 19 to 21 must be repeated.

User Guide | Network control AK-SM 720

23. Return to the overview.

Press ”operations”.

24. Select Injecton control

Inject-on

Groups established via this operation receive a signal so that liquid injection is stopped. Activation of the signal takes place via a compressor control.

(Shown here is the ﬁnal result when the group has been set up.)

25. Setup a new Inject-on group Press ”New”.

Press the +-button to go on to the next page

26. Here you can see which controllers receive the Inject-ON signal.

Give the group a name

Select which compressor control is to supply the signal. The compressor

control may have several suction circuits. Select the relevant one.

The picture to the left shows the ﬁnal result. The controllers have been selected via the ”Select” button. Only select controllers belonging to the selected suction group.

27. If several groups of Inject-ON controls have to be set up, points 25 to 26 have to be repeated.

User Guide | Network control AK-SM 720

28. Return to the overview.

Press ”operations”.

29. Select Defrost group control.

Defrost groups

Groups established via this operation will start defrost at the same time. Start after a defrost can take place individually, or there may be a coordination so that all units start at the same time. (Shown here is the ﬁnal result when the group has been set up.)

30. Setup a new defrost group Press ”New”.

Press the +-button to go on to the next page

— !

Give the group a name.

Do not enable the group until the whole group has been deﬁned (controllers can only be selected when the function has stopped).

(Manual start is an override. In daily operation it can be used to start an extra defrost process.)

Select whether there is to be coordinated defrost. That is, all will wait for a defrost stop, so that all will start at the same time.

! If you enable this function, a line will automatically be created and

reserved in the I/O conﬁguration. The line will contain the name of the function. In this line you must set a Module Number and a Point Number. See also page 56 onwards.

Here you can see which controllers are gathered in the group. The picture to the left shows the ﬁnal result. (The controllers have been selected via the ”Select” button.)

If you have a controller selected that does not support the function, an alarm will be triggered each time the defrosting starts.

Press the +-button to go on to the next page

User Guide | Network control AK-SM 720

31. Set the defrost schedule for the group

32. If several groups are to be set up, repeat points 30 to 31.

33. Return to the overview.

Press plant operations.

34. Select the control ”Adaptive Defrost”

Press on a day of the week and set the times for the various defrost starts.

If there are several days with identical defrost processes, use the copy function. The end result with two defrost processes a day can be seen in this screen.

Adaptive defrost

A group created via this control will use the “Adaptive defrost” function. The controllers in the group receive signals of the current condensation temperature from the condenser control. Only controllers with this function can be selected for the group.

Shown here is the ﬁnal result when the group has been set up.

35. Setup a new group

Press ”New”.

Up to ten zones can be set up.

Give the group a name.

Do not enable the group until the whole group has been deﬁned (controllers can only be selected when the function has stopped).

Specify the current address and section for the compressor/condenser control that belongs to the controllers.

A controller should only be included in one single defrost group.

User Guide | Network control AK-SM 720

Press the +-button to go on to the next page

36. If several groups are to be set up, repeat point 35.

The screen on the left shows the end result. The controllers are selected via the “Select” button.

P0 optimize

37. Return to the overview.

Press plant operations.

38. Select the ”P0 optimize” control

39. Setup a new optimization group Press ”New”.

— !

Groups established via this control will follow the temperature in the

selected cooling sections and transmit a signal to the compressor

control to the eﬀect that the suction pressure can be displaced.

Shown here is the ﬁnal result when the group has been set up..

Give the group a name.

Do not enable the group until the whole group has been deﬁned (controllers can only be selected when the function has stopped).

Allow the suction pressure to be displaced.

If the PO optimization needs to be disconnected in periods during control, you must activate the function "override via signal on a DI input". ! If you enable this function, a line will automatically be created and reserved in the I/O conﬁguration. The line will contain the name of the function. In this line you must set a Module Number and a Point Number. See also page 56 onwards.

Select the compressor control that regulates the suction pressure

If it is a compressor control with several sections, the relevant section must also be selected.

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Press the +-button to go on to the next page

40. Advanced settings

Here you can see which controllers are gathered in the group. The picture to the left shows the ﬁnal result.

The controllers have been selected via the ”Select” button.

Only select controllers belonging to the selected suction group.

Most settings are regulating parameters. Avoid changes – they should be reserved for specially trained staﬀ.

41. If several groups are to be set up, repeat point 39.

Avoid making changes – only trained personnel may implement these.

At the bottom of the display there is an alarm function which can give alarm if the optimization function displaces (reduces) the suction pressure towards 90% of the compressor control’s P0 min. setting.

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42. Return to the overview.

Press plant operations.

Light control

A group created via this control will switch the light connected to the deﬁned relay on and oﬀ.

43. Select the control ”Light Zone”

44. Setup a new light group Press ”New".

Shown here is the ﬁnal result when the group has been set up..

Up to eight zones can be set up.

Give the group a name.

Do not enable the group until the whole group has been deﬁned (controllers can only be selected when the function has stopped).

If necessary, select a light sensor.

— ! — ! — !

45. If several groups are to be set up, repeat point 44.

Deﬁne whether switches are to be connected to override the light. There can be either a switch or pulse pressure. If pulse pressure is used, a timer function can also be used so that the light is automatically switched oﬀ when the time has expired.

! If you enable this function, a line will automatically be created and

reserved in the I/O conﬁguration. The line will contain the name of the function. In this line you must set a Module Number and a Point Number. See also page 56 onwards.

The light level and subsequent functions are only used if a light sensor is used.

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46 . Return to the overview.

Press plant operations.

47. Select the control ”Adaptive Railheat”

Adaptive Railheat

A group created via this control will use the “Adaptive rail heat” function. The controllers in the group receive signals of the current dew point from a dew point sensor. The dew point sensor must be connected to the system manager. Only controllers with this function can be selected for the group.

Shown here is the ﬁnal result when the group has been set up.

Up to three zones can be set up, each with its own dew point sensor. (A dew point sensor will deliver a temperature signal and a voltage signal.)

48. Setup a new group Press ”New”.

Press the +-button to go on to the next page

— !

! If you enable this function, two lines will automatically be created and

reserved in the I/O conﬁguration. The lines will contain the name of the function. In these lines you must set a Module Number and a Point Number. See also page 56 onwards.

Give the group a name.

Do not enable the group until the whole group has been deﬁned (controllers can only be selected when the function has stopped).

State which of the three dew point sensors is to transmit a signal to this group.

The screen on the left shows the end result. The controllers are selected via the “Select” button.

49. If several groups are to be set up, repeat point 48.

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50 . Return to the overview.

Press plant operations.

51. Select the control ”Utility meter”

— !

Utility meter

This function will require a signal from a pulse counter. Consumption can then be monitored in the screens displayed. Up to eight measurements can be set up.

! If you enable this function, a line will automatically be created and reserved in the I/O conﬁguration. The line will contain the name of the function. In this line you must set a Module Number and a Point Number. See also page 56 onwards.

52. Setup a new group Press ”New”.

53. If several groups are to be set up, repeat point 52.

54. Common functions

You access the joint functions from the 1st screen, where you press the + button

Give the function a name.

Do not enable the function until the whole function has been deﬁned (settings can only be deﬁned when the function has stopped).

Specify the unit of measure. KWh when measuring current, m3 when measuring gas. Also deﬁne:

- How many pulses are to be received for each unit of measure.

- Any necessary scaling.

- Any reset (or other start value) of the display.

The measurement can be monitored in the ﬁve ﬁelds. These display the total consumption, the current load and the average load over the period of time.

Here you must deﬁne the joint data for the tariﬀ functions. The synchronisation method will be time-based if no input is connected with a tariﬀ signal.

• Normal: A new period starts when the synchronisation input is switched on.

• Special: As normal, but a new period also starts when the tariﬀ input is changed.

Load period is the expected time between two synchronisation signals.

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55 . Return to the overview.

Press plant operations.

56. Select the control ”Load shedding”

Load shedding

This function can only be used together with the earlier “Consumption measurement” function. If consumption rises to a peak situation, some of the load can be

disengaged so that consumption does not exceed a deﬁned value.

! If you enable this function, a line will automatically be created and

reserved in the I/O conﬁguration. The line will contain the name of the function. In this line you must set a Module Number and a Point

Number. See also page 56 onwards.

Do not enable the function until the whole function has been deﬁned

(settings can only be deﬁned when the function has stopped).

Give the function a name.

Select the utility meter which will be sending the signal. A utility meter must be deﬁned before you can select this.

— !

Press the +-button to go on to the next page

Set max. values for the individual tariﬀs.

In the “Current load %” line you can see the current consumption as a % of the maximum permitted consumption.

Start shedding: This is where you adjust the percentage value of the tariﬀ where the cutout is to start. The highest zone number cuts out ﬁrst.

Start restoring: This is where you can adjust the percentage value of the tariﬀ where any cutouts are cut back in.

Deﬁne a value in the “Alarm limit” line. If this value is exceeded, an alarm will be transmitted.

Neutral time is the time after a new synchronisation when loads are not disengaged, regardless of consumption.

Delay between engaging and disengaging the individual zones.

Number of zones that can be disengaged.

Zones in operation

In the next display the minimum-on and minimum-oﬀ times for the zones can be set.

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First start of system manager

Check alarms

1. Go to the overview

2. Go to the Alarm list

3. Check active alarms

In our case we have alarms both from the system manager itself (address 11:001) and from other controllers on the network.

We wish to start a fresh survey which only shows alarms that are active.

4. Remove cancelled alarm from the alarm list

- Mark oﬀ all alarms (to show and acknowledge that you have

seen the alarm)

- Press the update button. Subsequently all alarms that have stopped will be cancelled.

Left now will be the actual alarms.

5. Check active alarms again

If active alarms still remain the reason for them must be found and corrected.

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Lock conﬁguration of connections

We locked the setup earlier in the process. Check that it is still locked.

1. Go to Conﬁguration menu

2. Select Lock conﬁguration

3. Start system manager

The setup lock only has inﬂuence on changes of connections and deﬁni-

tions in the four menus under I/O setup and IP setup.

All other settings may freely be made.

Set the setup to Locked.

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Check level for safety

1. Select the display with plant data

2. Check the line with ”Administrator access”

Administrator access:

If setting = “Yes” access will only be permitted if the names with the ID are 100% identical. If “No” is set, ID is ignored. The setting may be used in start-up situations where IDs are not yet in place or in a service situation where Danfoss needs to have access.

If you set "password" = 0 the password function is ignored.

Conclusion

1. Conclude the Service tool programme.

2. Connect modem

The plug from the Service tool programme is removed from the controller and the modem plug is connected in its stead.

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5. Regulating function

Function

Data communication

AK-SM is a system manager that co-ordinates the data communication to and from the refrigeration controllers type AK- and EKC. The system manager receives alarms and data collections, which are then forwarded to deﬁned recipients.

The system manager has control functions that are forwarded to the individual controllers via data communication – functions that do not therefore need wiring.

Functions

In addition to the data communication the system manager can control other functions between the controllers — functions that do not therefore need wiring. The functions are as follows:

• Alarm coordination

• Alarm routing

• Coordination of clock function for all controllers

• Weekly schedule for diﬀerent functions

• Control of defrost times

• Master control functions:

- Coordinated defrost

- Inject-on function

- On/oﬀ control

- Day/night control

- Adaptive defrost

- Adaptive railheat

• User access with password and authorization level

• Communication control

• Safety with:

- Watchdog function

- "I'm a live" messages

• Central functions:

- Light control

- Utility meter

- Load sheeding

Examples of the structure of a system

Connection via modem

Connection via TCP/IP

In larger networks several System Managers are connected to one another via the TCP/IP connection.

Controllers with DANBUSS data communication can be connected via a TCP/ IP connection. The same applies to wireless units

User Guide | Network control AK-SM 720

Local data communication

Communication control

This function checks communication between the units connected to data communication. There is also continued control of whether all units are still present. Units that drop out are discovered within two minutes (short-term dropouts will not always be discovered).

If a unit drops out, e.g. as a consequence of a power failure, the function will discover this and transmit an alarm, e.g. after ten minutes.

A new unit in the network will not be registered until the scan function is enabled in the system manager.

If more than one system manager is connected in a network, the control function in system manager with address 1 will check the communication with the other system managers.

Addresses

One or more system managers

A system manager in a system must have address number 1. All of the connected group of controllers will then have network number 1.

11:001

11:002

If there are several system managers connected together, the other system managers are allocated addresses 2, 3, etc. However, there may be a maximum of ten.

The address is set at the front of the system manager, but is only transferred to the software when the “Service PIN” button is enabled. The address can then be viewed in the system manager’s overview screen as “11:001”. The network here is number 1, as denoted by the ﬁnal digit. All controllers connected to this network will be assigned network number 1, e.g. 001: xxx 001:yyy in which xxx and yyy are the addresses of the respective controllers.

If there are several system managers connected in the same network, the addresses of the others will look like this: 11:002 11:003 The ﬁgure 11 will always be 11, and this cannot be changed.

The system manager with address 1 is the master for the total number of system managers and controllers. All functions and controls are deﬁned in the master unit. A total of 200 addresses can be connected.

DANBUSS

Other units in the TCP/IP network

As the ﬁrst ten addresses are reserved for other system managers, the subsequent ones can have addresses 11 to 999. However, 999 is permanently reserved for a wireless unit. Examples: 11:011 can, for example, be an AK-PI 200 11:012 can, for example, be an AK-PI 200 11:999 will be a wireless device.

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Extern data communication

If the system manager is to have a connection from the system, this can be achieved via:

• Modem and ﬁxed network

• Modem and mobile network

• TCP/IP net

Modem

The modem used must have been tested by Danfoss. Contact Danfoss for an approved suppliers list.

. The modem is connected to the socket on the front (the same socket that a Service tool uses). Two cables are used, a 080Z0261 and a standard zero modem cable. Both cables are supplied when you order a modem type AKA 231 from Danfoss.

The initialization command string can be changed. However, this will only be necessary in very few instances.

E0, V0, S0=0, S0=0, &D0, &D1 and &D3 must not be contained in the command string.

For further information about these commands, please refer to your modem manual.

A number of modem codes can be keyed in together with a telephone number. These modem codes attach to a speciﬁc telephone number and are sent on to the modem together with the telephone number. The following codes can be keyed and attached to a telephone number in the router table:

P: Pulse dialling. Used in old telephone exchanges and private

switching systems. T: Tone dialling. Used in new telephone exchanges. W: Wait for ring back tone (dial tone) , : 2-second pause %n: Modiﬁes the calling speed for this particular call * : Special character for private switching system

# : Special character for private switching system

For further information about these commands and codes, see the modem manual.

Call-back function

The function can be used for service and transmission of log data via the telephone network. The call-back function is selected from the extern system software fx. the AKM programme and is essential for all systems from which service or log data are collected. The function sees to it that the system manager will return the call to the AKM programme, and hence pay for the transmission time.

The supply voltage to the modem must be connected via a relay output. This enables the system manager to reset the modem. The modem will also be switched on and started in a controlled way when the system manager is switched on.

It is possible to set commands for control ling the connec ted modem. These commands are in the form of an initialization string transmitted to the modem when it is switched on.

From the factory a system manager contains the following AT command string: AT Z < CR > AT E1 SO = 2 &D2 V1

The command has the following meaning:

AT Attention sequence Z Reset modem to power-up status E1 Echo on V1 Verbose result codes (e.g.”CONNECT 1200" instead of “4”). &D2 HW mode for on hook via DTR S0=2 Auto answer ON, answer after 2 rings

Procedure The AKM programme calls the system manager and starts the callback function. 15 seconds later the system manager establishes a telephone connection to the AKM programme. If the connection is not established at the ﬁrst try, two more attempts will be made at 5minute intervals. When the master gateway has established the telephone connection the AKM programme will take over.

An automatic log transmission is carried out in this way: Based on the individual log deﬁnitions, the AKM programme knows how often it has to collect data from a system. The AKM programme starts the procedure, and when the connection has been established, the collection will commence. If the system manager does not manage to establish a telephone connection, the AKM programme will call again, and collection will then be started immediately.

Modem and mobile network

A GSM modem is used here. Danfoss recommend Cinterion MC52iT / MC55iT.

Functions are as for a ﬁxed network modem.

User Guide | Network control AK-SM 720

SMS

Alarms may be sent to a destination via SMS. (System manager version 1.6x or later). (Destination ID and Pass code are cancelled.)

TCP/IP

Outgoing communication can also be undertaken from the TCP/ IP output.

A HUB, Switch or Router can be connected as required. If a HUB or Switch is used, the system manager must be assigned a ﬁxed IP address.

System manager number 1 must always have a ﬁxed IP address.

This must be obtained from the local IT department. (Danfoss AK controllers use port 1041.)

The following can have a dynamic IP address:

- System manager number 2 upwards

- Protocol interface AK-PI

- Wireless AK-WR

Danfoss strongly recommend to restrict communication access to the System manager as much as possible. This includes allowing only TCP communication to pass through port 1041.

UDP communication is only required for inter-communication to AK-PI200 as well as additional System Managers and controllers.

Danfoss recommends blocking UDP port access on the connected network Router to the SM720.

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Alarm handling

When setting up the system manager there is one setting that enables alarms from all of the connected controllers. All alarms received are recorded in an alarm list, where they are held for further processing. If the system manager is not to receive alarms for the alarm list and further processing, this function must be deselected.

The ﬁrst thing the system manager do when it receives an alarm from a controller is to send a acknowledge (transport receipt) to the controller that triggered the alarm. The controller will now know that the alarm has been received and registered If it did not receive this accept, the controller would repeat the alarm message ﬁve minutes later. The second thing that happens is that the alarm is time-stamped and ID codes (net ID and bus ID) must be entered, if applicable. The third, that the alarm will be passed on to the deﬁned alarm receiver(s).

Alarms from EKC controllers will also be registered by AKA 245, but if the data connection between the EKC controllers and the gateway is interrupted, only an active alarm, if any, will be present when the connection is reestablished. In other words, all alarms occurring during the period without data communication will not be registered.

Alarm status

When an error occurs, an alarm will appear with the status “active”. Once the error has been rectiﬁed, a new alarm will appear with the status “inactive”.

The alarm list

The alarm list can contain the 200 most recent alarms. Once the list is full and a new alarm arrives, the oldest alarm will be deleted. In terms of view, alarms are divided into “active” and “inactive” alarms. An alarm will have the status “active” until it once more becomes “inactive” and the “inactive” one has been acknowledged.

Alarm priority

The various alarms generated by an individual controller or by the system manager can be assigned a priority. The priority is used to deﬁne how the individual alarm is dealt with. The priorities are:

• High

• Middle

• Low

• Log

• Disabled.

• High, medium and low are forwarded to various alarm receivers.

• High is normally used for alarms where immediate action is

required.

• Log will only be registered in the alarm list as an inactive alarm.

• Cancelled will not be registered anywhere.

In system software type AKM alarm status and alarm priority will have the following relationships:

Alarm status Priority AKM Status

Active High 1

Active Middle 2

Active Low 3

Inactive High, middle, low 0

Alarm indicator

Alarm LED

When there are active alarms in the system manager, “Alarm” will ﬂash. If alarms are forwarded, “Alarm” will ﬂash from the alarm being registered until it is forwarded to the primary or secondary alarm receiver and conﬁrmation of delivery has been received.

Alarm relays

The priorities high, medium and low can be assigned an alarm relay, which is enabled when an alarm of the priority in question occurs. A time can be deﬁned for the enable function, so that the relay is only enabled for a preset time. The relay can also be set to be disabled when there are no active alarms with the priority in question.

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Alarm routing

Alarm routing forwards the alarm to a speciﬁed receiver, but the system manager retains a copy of the alarm for its own use. A little later, when the receiver has received the alarm, the receiver will return an acknowledgement of receipt. Action then rests with the receiver.

Alarm receivers

First of all ﬁxed data must be deﬁned for everyone who is to communicate with the system manager. There can be one or more alarm receivers, or others who must have access to make calls to the system. Only then can the various alarm routes be deﬁned. (In other words: only when we know some addresses can we decide what we want to transmit and when.)

A name and access code are deﬁned for every single receiver.

• Name and access code are the receiver’s access validation, if this person makes calls to the system using Danfoss software type AK-ST, AKM or EM.

• For every single receiver communication type is selected, as well as the associated details that are valid for this type.

• A receiver may not be used until the receiver has been enabled.

• If a receiver is disabled, a message will be sent to the receiver stating that disabling has taken place.

What can be transmitted

Several diﬀerent alarm routes can be deﬁned. An alarm route can be deﬁned to deal with one single alarm priority or a combination of several priorities. The options available are all, high, medium, low, high to medium and low to medium. The combinations are chosen that are suitable for the individual application. Once the number of routes has been deﬁned and named, a route can be assigned a receiver.

Alarm route full

The alarm route system can handle up to 50 alarms at the same time. Alarms can occur so quickly that distribution of the previous ones has not been completed when a new alarm occurs. The routing system can therefore transmit several alarms in one call. If connection cannot be established to an alarm receiver, an alarm dispatch cannot be completed. A repeat transmission process is initiated. If several alarms occur that are for the same alarm receiver, the alarm route can become full. The system manager then issues an “Alarm route full alarm”. When this happens future alarms will be registered, but not transmitted. When the fault has been rectiﬁed, the alarm list must be reviewed manually to see whether there are been any alarms that have occurred and been sent and that require the system to be adjusted. The alarms that are active for the system when the connection is OK will be sent to the alarm receiver.

Alarm repeat

If an alarm message cannot be delivered within 5 mins, it will be re-transmitted every 5 mins until it can be delivered. The diagram below shows the repeat delivery process.

Start

Pause in minutes / Receiver/ Repeat trail

0 /

5 /

5 / Pri / 3

0 / Copy 3

Pri / 3

5 / Copy 3

Sec / 3

5 / Copy 3

Pri / 3

5 / Copy 3

Sec / 3

5 / Copy 3

Pri / 3

5 / Copy 3

Pri / 3

5 / Copy 3

Sec / 3

5 / Copy 3

Pri / 3

5 / Copy 3

Sec / 3

5 / Copy 3

Pri / 3

5 / Copy 3

Sec

/ 3

5 /

Copy

etc.

etc. Max. 1 h

Receiver types

Primary destination

An alarm receiver who is to have the alarm because this person is responsible for rectifying the error. The system manager will always resend to a primary receiver if this person for some reason has not acknowledged receipt. Re-sending stops if a secondary receiver is deﬁned who acknowledges the alarm.

Secondary destination

An alarm receiver who is to be used if the primary alarm receiver does not acknowledge the alarm. The secondary receiver is also responsible for rectifying the error or for making sure that the primary alarm receiver is informed of the alarm. The alarm is resent to the secondary alarm receiver until the primary or secondary alarm receiver has acknowledged the alarm.

Copy destination

A receiver who is not responsible for rectifying the error. The receiver is notiﬁed about problems. If the copy receiver does not acknowledge an alarm, it is resent for up to one hour, after which no alarms are resent.

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Plant controls

The system manager contains functions that retrieve data from selected controllers for the data communication process. It then processes the information and concludes by deﬁning values in other selected controllers in the network. The individual controllers will then perform the function speciﬁed.

The following functions can be set up:

Schedules

A schedule will deﬁne a series of on/oﬀ times (signals), which can be used by other functions. A schedule is based on a weekly clock, where special days can also be assigned that deviate from the schedule’s normal weekly layout, e.g. public holidays or other ﬁxed days oﬀ. These special days are deﬁned on an annual basis either as days repeated year after year or as days for which the date is only valid for the current year.

Schedule of ﬁxed times

The desired on and oﬀ times are set here.

Schedule of the store’s hours of business

A schedule can be created to represent the store’s hours of business. It also includes the days of the year when the store is closed. A combination of this schedule and a relative schedule will mean that only one schedule needs to be adjusted if the hours of business change from the ﬁxed pattern.

On/Oﬀ function

This function monitors a selected On/Off signal on a selected controller. When the signal is registered to On, the system manager will override selected functions on other controllers to On. All the deﬁned functions will follow the signal. The signal can be inverted. This means that when On is registered, the selected functions will be force controlled Oﬀ.

Schedule of relative times

Here the times are set so that they relate to another schedule, i.e. the on time, for example, is 15 minutes before the times in another schedule and the oﬀ time, for example, is 30 minutes after the times in another schedule. The second schedule will typically be the schedule containing the store’s hours of business.

The result of a relative schedule and one with the store’s hours of business from 09:00 until 18:00 may be seen below:

Both types of schedule can be overridden with a switch function. If the switch is activated when the schedule is oﬀ (night), it will create an on (day) status. If the switch is activated when the schedule is on (day), it will have no function.

AK-SM 720

Day/night function

The function will transmit a signal for night operation to the various refrigeration sites. The function is used, for example, on appliances that are protected by a night cover during the night. The function here will displace the thermostat reference. All of the deﬁned controllers will follow the signal. The signal is generated by a schedule or from a switch function connected to the system manager.

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Inject ON Signal

This function is used to close the expansion valves on all evaporator controls when all of the associated compressors have been stopped by the automatic safety function. This avoids the presence of liquid in the evaporator, which is passed on to the compressor when it restarts. For example: when the compressor stops, the compressor control transmits a signal via data communication. The system manager then forwards the signal to the deﬁned controllers, which then close the valve.

Signals can be received from compressor controls of the following type:

- AK-PC

- EKC Signals can be transmitted to controllers of the following type:

- AK-CC

- EKC.

Defrost groups

This function transmits the signal of a defrost start to a group of controllers.

Adaptive defrost

This function is an optimisation of the defrost time in the individual evaporator controls. For the evaporator control to be able to optimise this function, it must recognise the condensation temperature Tc. The system manager reads the condensation temperature in the condenser control and sends the value to all evaporator controls in the group. Up to ten groups of evaporator controls can be deﬁned. One evaporator control can only be a member of one group. There can be up to 30 evaporator controls in a group. The signal from the condenser control can be used by several groups.

Possible problem If the signal with the value of the condensation temperature of an evaporator control is not available, the evaporator control will switch to an error compensation status, which takes account of the absent signal.

P0 optimization

This function will adapt the refrigeration system’s suction pressure, so that the suction pressure does not become lower than that the most heavily loaded refrigeration appliance can maintain the desired temperature.

The defrost process start can come from a weekly schedule or from a switch function connected to the system manager. When defrost has started, it is up to the individual controllers to determine how it is concluded. Some based on time, others based on temperature. Refrigeration commences when the controller gives permission for it. If, however, refrigeration is to start at the same time for the whole group of controllers, the “Coordinated defrost” function must be selected. When the defrost process has been ended by the individual controller, the controller switches to hold. The whole group is not released for refrigeration until the ﬁnal controller has ended its defrost process.

To provide security, a time must be set in the individual controllers. There is a maximum permitted hold time to wait for the start signal for refrigeration. If this time is passed, refrigeration will be restarted regardless of signals from data communication.

This is achieved by the system manager continuously:

- questioning selected controllers

- ﬁnding the appliance that requires most refrigeration at the current suction pressure and monitoring the temperature

- sending a signal to the compressor control to the eﬀect that the suction pressure can be adapted

- ﬁnding the suction pressure at which the temperature is precisely maintained

The process is repeated continuously.

An appliance will not start to work when it has just completed a defrost process. Data is only retrieved from the controller after 30 minutes. The time can be conﬁgured.

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Light control

This function is used to control the lighting in a number of zones in a store. The function is controlled on the basis of a schedule. When light is needed, a light meter will register whether there is suﬃcient daylight or whether electric light has to be switched on. The user can override the automatic light status with a switch function.

The system manager can handle up to two light sensors, which must be type 080Z2172. The system manager can handle up to eight zones. The need for light is entered into one or more schedules. The same schedule can be used for several zones. For each zone you select the relevant light sensor as well as the on and oﬀ light levels for the zone. Minimum times are also set, so that the light is not switched oﬀ during short-term changes in the light level. All zones can be ﬁtted with override switches, which render the automatic function powerless.

It is also possible to deﬁne a switch that is valid for all zones. This can, for example, receive signals from other equipment, e.g. ﬁre or alarm systems.

Example

Adaptive rail heat

Adaptive rail heat is used to obtain energy-eﬃcient control of the rail heat of refrigeration appliances. Evaporator controls with this function must receive a signal with the current dew point value. A dew point sensor is connected to the system manager, which then transmits the value to the various controllers via data communication.

Up to three groups of evaporator controls can be deﬁned. Each group must have its speciﬁc dew point sensor. The dew point sensor must be located in the same room as the refrigeration appliances that are to receive the signal. One evaporator control can only be a member of one group. There can be up to 30 evaporator controls in a group.

The dew point sensor must be type 080Z2171.

Possible problem If the signal with the value of the dew point of an evaporator control is not available, the evaporator control will switch to an error compensation status, which takes account of the absent signal.

A store is divided into four zones: three sales areas and one warehouse area.

• The three sales areas use the same schedule.

• In the warehouse area there is a need for light two hours before and one hour after the hours of business.

• Two relative schedules are created with reference to the store’s hours of business.

• The light sensor is positioned outside the building and measures the general daylight.

• The light levels for the zones are set so that the light is switched oﬀ when the daylight provides suﬃcient light in the zone. The individual zones have diﬀerent values, according to how much daylight comes in.

• An override switch is set up in the warehouse area, making it possible to switch on the light outside the planned schedule, e.g. for goods deliveries at night. A delay function means that the light is switched oﬀ one hour after the override has been enabled.

• Signals are received from alarm systems and ﬁre alarms, so that all lights are switched on if a signal is received.

Consumption measurement

This function registers the consumption of electricity, water, gas, etc. These measurements are saved in the system manager and can be retrieved later for presentation, analysis and settlement. An expansion module type XM107A must be used. The module is a pulse counter module, which measures pulses in accordance with DIN 43 864. Conversion from, for example, current to pulses takes place in an energy counter.

Tarif 3

Tarif 2 Tarig 1

Energy counters can be divided into several groups, e.g. one main meter and several ancillary meters. The main meter measures all of the consumption for the installation. Some main meters are ﬁtted with tariﬀ and synchronisation switches.

• The tariﬀ switches change position, depending on tariﬀ changes.

• The synchronisation switch changes at regular intervals (typically every 15 mins) and indicates that a new measurement period has started.

These switches can be connected to the system manager, which will monitor the switches and save the tariﬀ information and consumption data for all of the energy meters connected when a new measurement period starts.

User Guide | Network control AK-SM 720

Ancillary meters measure an element of consumption. It might be interesting to know, for example, the freezer department’s energy consumption.

Measurement intervals and the consumption of synchronisation and tariﬀ inputs are set jointly for all energy meters. If these inputs are not used, the system manager will deﬁne its own measurement period.

The system manager supports up to eight energy meters.

The conversion ratio, unit and pulses per unit must be set on the basis of the current conﬁguration. The conversion ratios for current and voltage transformers are multiplied. The conversion ratio is deﬁned as primary/secondary signal. Each measurement can be named, to make it easier to review data later. The unit can also be given any name. Each individual energy counter can be started and stopped. It is also possible to reset the current counter value to 0 or to another value. E.g. when changing energy counter. The time of this setting will be saved.

Load shedding

This function makes it possible to avoid high peak loads. Energy prices can be billed diﬀerently, e.g.

• peak consumption

• peak consumption in a period

• diﬀerent value at diﬀerent times of the day This function places a ceiling over consumption within a period and evens out consumption.

At the beginning of a period all consumption will be engaged during an adjustable period of time, so that the function has a basis for calculation before control commences. To achieve stable control, the commencement of disengagement and engagement must be deﬁnable as a percentage of maximum consumption.

Disengagement will take place in order of priority, so the consumption that is most suitable for disengagement must be connected to the output with the lowest priority. Relay 1 has the highest priority and is the last one to be cut out. Relay number 2 has the next highest priority etc. The highest number is cut out ﬁrst. When re-engagement takes place, the relay that was most recently disengaged is the ﬁrst to be engaged.

Disengagement of consumption is protected by an adjustable minimum timer, which makes sure that the relay does not change more often than consumption permits.

The current limit, current calculation of consumption and relay status can be read via Service tool.

• The function is named

• The energy meter in relation to which regulation takes place is speciﬁed.

• There can be diﬀerent tariﬀs. Signals can be received from two inputs on diﬀerent tariﬀs. Three limits can be deﬁned on the basis of the signals. The various limits are enabled as follows:

Tariﬀ 1-2 (input) Tariﬀ 3 (input) Actual tariﬀ

Inactive Inactive Tariﬀ 1 limit

Active Inactive Tariﬀ 2 limit

Inactive Active Tariﬀ 3 limit

Active Active Tariﬀ 3 limit

Consumption is monitored within a measurement period. If consumption rises above a limit, consumption will gradually be disengaged with the aid of relays. One consumption has fallen below the limit once more, re-engagement takes place. Disengagement can take place in ten steps. As already mentioned, current consumption must be registered under consumption measurement.

Synchronisation time eg. every 15. min.

Tarif

fx 90%

fx 80%

For each tariﬀ a limit must be deﬁned, according to which the system manager will disengage.

Limitations

It is important to observe the following limitations otherwise data communication will be overloaded.

Function Max. number

of groups

Day-/night function 20 30 controllers

Inject On signal 5 120 sections

Defrost group 20 30 controllers

Adaptive defrost 10 30 controllers

P0-optimasation 5 120 sections

Light control 2 light sensors and 8 relays

Adaptive Railheat 3 30 controllers

Consumption measurement 8 pulse counters

Max. number each

group

User Guide | Network control AK-SM 720

Logs

Data collection in the system manager

Data collection is performed in the system manager to which the individual controllers are connected.

For deﬁnition, start, stop and presentation of a data collection (logs) it will be necessary to have a switch for an operating interface. During the rest of the time the system manager itself will take care of data collection. Data can thus be collected for a system that is not directly connected to a PC. The data collected can then be downloaded at intervals to a PC, so that it can be presented. Downloading can take place, for example, via a telephone connection.

Two diﬀerent types of logs can be created in the system manager:

1) Food Safety logs (“authority logs”) and

2) Service logs. The diﬀerence between these lies mainly in the intervals at which data can be logged, and thus the length of the period of time for which the memory has the capacity.

Limitations:

- It is possible to create max. 200 logs in a system manager.

- Each log will represent one controller

- Each log can contain a maximum of ten parameters

- The interval for Food Safety logs is between 15 minutes and 24 hours

- The interval for Service logs is between 1 minute and 4 hours

- If too many service logs are created, data communication will be overloaded and there will be “gaps” in the log data.

immediately, as all data readings will take place at times adjusted according to the log interval. This means, for example, that in a log with an interval of 15 minutes, data will be read at times that are multiples of these 15 minutes, i.e. at 0, 15, 30 and 45 minutes past the hour. By the same token, a log with an interval of 2 hours will be read at even hours, i.e. 0:00, 2:00, 4:00, 6:00, etc. until 22:00. If the interval is 6 hours, the times will be 0:00, 6:00, 12:00, 18:00. These ﬁxed log times cannot be changed.

If a log has been stopped for a period and then restarted, there will be no data for the period in question.

The system manager performs ongoing checks on all log setups by means of a simple check total calculation. In the event of any error, the log in question will be deleted. An alarm is then issued with details of the log number.

When setting up logs, the system manager will show how much of the capacity is being reserved. If the max. capacity is being approached, either the interval must be made longer or the log period shorter.

The log function is able to continuously collect and save data from the controllers that are connected to the network for which the system manager in question is the master.

Deﬁnition, start, stop and presentation of a data collection (logs) must be undertaken from software type AK-ST. Data collections can also be retrieved and presented in software type AKM.

All logs in the system manager are “rolling”, i.e. data are overwritten if they are not downloaded within the preset period of time (expiry time).

The log setup will be deleted and all data collected will be lost if the system address of the system manager is changed or if the supply voltage is removed and the battery is defective or has been removed.

If logs (a single one or all of them) are deleted without the logged data being downloaded, these data will be lost. No alarm is issued in the event of such a deletion.

When a log starts, data collection will not necessarily take place

User Guide | Network control AK-SM 720

Data collection takes up this much room

When a log is established, room is set aside for data. Just how much room is reserved is determined by various parameters. The amount of room that will be reserved can be seen when new logs are established. Example: Only Food Safety logs are collected. If six parameters from 20 controllers with one hour time interval are logged and the period time is set to 540 hours it will give a 9% utilisation of the storage capacity. (After the 540 hours (22,5 days and nights) the oldest data will be overwritten by new data.)

Below examples are given of three system sizes with diﬀerent log deﬁnition options:

Number of controllers

100

Log type

One type Food Safety

Combination

One type Food Safety

Combination

One type Food Safety

Combination

Food Safety 20 6 1 h 180 h 3

Service 4 10 1 min. 12 h 3

Food Safety 50 6 4 h 360 h 6

Service 6 10 1 min. 6 h 3

Food Safety 100 8 4 h 120 h 12

Service 10 10 1 min. 12 h 8

Number of

logs

20 6 1 h 540 h 9 20 10 4 h 960 h 6

50 6 1 h 216 h 10 50 6 4 h 864 h 10

100 6 1 h 100 h 10 100 6 4 h 360 h 8

Number of parameters

per log

Time interval Period of time

Utilised capacity (%)

One type Combination

Alarm logs:

See alarms

Event logs:

See alarms.

User Guide | Network control AK-SM 720

Operation

Direct operation

Setup and operation are performed using software type AK-ST. Access is provided via the correct password.

Remote operation

After setup, operation can be performed remotely – either via a modem or via an IP network. Operation is also performed using software type AK-ST. Access is provided via the correct password.

Security During setup of the system manager a destination and a password must be entered: The same settings are deﬁned for the external system. When a call is made the name is cross-checked, and contact is only created if the name is 100% identical. After contact is made, the correct password is also required in order to identify the user.

System software type AKM The system manager can not be operated from AKM, although AKM can receive alarms and logs. Please refer to the relevant sections.

Settings in System manager Settings in Service tool

Setting in AKM

User Guide | Network control AK-SM 720

Clock

Clock function

The system manager has an built in clock function, which is used for:

- Time stamping of alarms.

- Synchronisation of clocks in all connected controllers.

- Switching between summer/winter time settings.

- Schedule functions, e.g. for day/night controls.

- Log function. Logs can only be collected when the clock is started.

The system manager that is assigned address 1 for a network is given primary clock function. This system manager will synchronise the clocks in all controllers in the network. If other system managers are also connected via the IP network, they will also have their clocks synchronised from address 1. The clocks are synchronised after each startup of the system manager, and thereafter at least once every 24 hours. If a controller has been without power for more than two minutes, the clock will be synchronised when the controller is once more registered in the network.

The clock module is ﬁtted in the system manager in the factory.

Only the clock uses battery backup. The other functions are independent of battery backup. An alarm message will be issued when the battery needs replacing.

The clock function must be set after the battery has been replaced.

3 V CR2032

Danfoss takes security and the integrity of its applications seriously and is continuously investing in bringing to market products and services that have best-in-class security features and technologies. Danfoss products are Engineered to last many years and, as technologies and security risks evolve, it is important to ensure basic best practices are in place so that no matter how old your product is, you can have a level of core security that will continue to support your business needs.

Please read the important section below for recommend best practices on securing your control systems when connecting to digital networks. The current generation of Danfoss refrigeration controller frontends are embedded devices designed to be installed behind secure networks and ﬁrewalls. Due to the longevity of several

Installation considerations

Danfoss products installed in the ﬁeld it is important that key security steps are taken to ensure protected operations. Please consider the important recommendations below to ensure your application has a minimum level of network security and integrity.

• Ensure your System Manager is NOT connected to an open or public network

• Danfoss highly recommends changing the products default user name and password

• Do not share or publish any user name and passwords

• Consult available industry standards (i.e. ISO/IEC 27002:2013) for further reference and guidance on organizational information security standards and information security management practices.

Accidental damage, poor installation, or site conditions, can give rise to malfunctions of the control system, and ultimately lead to a plant breakdown.

Every possible safeguard is incorporated into our products to prevent this. However, a wrong installation, for example, could still present problems. Electronic controls are no substitute for normal, good engineering practice.

Danfoss wil not be responsible for any goods, or plant components, damaged as a result of the above defects. It is the installer's responsibility to check the installation thoroughly, and to ﬁt the necessary safety devices.

Special reference is made to the necessity of signals to the controller when the compressor is stopped and to the need of

liquid receivers before the compressors.

Your local Danfoss agent will be pleased to assist with further advice, etc.

ADAP-KOOL®

Danfoss AK-SM 720 User guide

Specifications and Main Features

Frequently Asked Questions

User Manual