Eaton Holec Clink II User manual

TAKING CARE OF YOUR POWER
Clink II SCU Manager
Manual
version 5.0

CLINK II SCU MANAGER
2
version 5.0
REVISIONS CLINK II SCU MANUAL
Realisation in corporation with:
Geert van der Molen
Copyrights: ©2003 Eaton Electric N.V. All rights reserved.
Table 1: Versions Clink II SCU manual
Version Date Description
1.0e November 29th 2000 Initial version
2.0 February 18th 2000 Minor changes (author: E. Morskieft)
2.1 July 2nd 2001 Minor changes (author: R.M. Wetzels)
2.2 September 2003 Environmental conditions changed
(author R.M. Wetzels)
3.0 October 2001 Changes regarding the use of LCU-4 (author R.M. Wetzels)
5.0 June 2003 Manual adapted with the use of LCU-5 and with the SCU
protection functions Over / Under Voltage and Under current
(author R.M. Wetzels).

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Contents
1. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
1.1 Audience SCU manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
1.2 Required knowledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
1.2.1 Commissioning and maintenance personnel . . . . . . . . . . . . . . . . . . . . . 8
1.2.2 System engineer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.3 How to use the Clink II manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
1.3.1 Using the SCU manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.3.2 Using the System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.3.3 Using the LCU-5 Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.4 Referenced documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
1.4.1 Holec Holland documents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.4.2 Documents from other sources. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2. DESCRIPTION OF THE STARTER CONTROL UNIT. . . . . . . . . . . . . . . . .10
2.1 Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
2.2 Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
2.3 History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
2.4 Design and layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
3. SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
3.1 Safety aspects Capitole 40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
3.2 Safety instructions Clink II . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
4. COMMISSIONING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
4.1 Placing an SCU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
4.2 Checking the jumper setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
4.3 Setting the power supply configuration . . . . . . . . . . . . . . . . . . . . . .12
4.4 Putting the SCU into operation . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
5. FUNCTIONAL DESCRIPTION SCU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
5.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
5.2 Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
5.2.1 Mains voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.2.2 Motor current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.2.3 Earth leakage current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.2.4 Motor temperature rise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.2.5 Active power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.2.6 Power factor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.2.7 Energy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.3 Inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
5.3.1 Digital inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.4 Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
5.4.1 Digital outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.4.2 Analog output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.5 Motor control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

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5.5.1 Control levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.5.2 Switching conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.5.3 Interlockings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.6 Starter logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
5.6.1 Tray in Test state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.6.2 Drive type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.6.3 Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.6.4 Starter logic Direct on Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5.6.5 Starter logic Star-Delta . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5.6.6 Starter logic Forward-Reverse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
5.6.7 Starter logic Dual-Speed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
5.6.8 Stop/start commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
5.6.9 Command after communication failure . . . . . . . . . . . . . . . . . . . . . . . . . 40
5.7 Automatic restart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
5.7.1 Mains failure detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
5.7.2 Contactor failure detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5.7.3 Restart time out. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5.7.4 Immediate restart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
5.7.5 Delayed restart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
5.7.6 No restart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
5.7.7 Cancel automatic restart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
5.7.8 Automatic restart during starting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
5.7.9 Automatic restart during powerdown . . . . . . . . . . . . . . . . . . . . . . . . . . 44
5.8 Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
5.8.1 Characteristics of protection functions . . . . . . . . . . . . . . . . . . . . . . . . . 45
5.8.2 Read-out of trip and warning signals . . . . . . . . . . . . . . . . . . . . . . . . . . 45
5.8.3 Acknowledge command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
5.8.4 Motor stall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
5.8.5 Motor overload . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
5.8.6 Phase unbalance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
5.8.7 Earth leakage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
5.8.8 Process underload . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
5.8.9 Process overload . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
5.8.10 External protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
5.8.11 Over Voltage Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
5.8.12 Under Voltage Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
5.8.13 Under Current Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
5.9 Monitoring of diagnostic and maintenance data . . . . . . . . . . . . . . .54
5.9.1 Number of operating hours . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
5.9.2 Number of contactor operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
5.9.3 Number of contactor operations during last hour . . . . . . . . . . . . . . . . . 55
5.9.4 Starting current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
5.9.5 Starting time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
5.9.6 Trip current L1, L2, L3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
5.9.7 Time to trip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
5.9.8 Time to reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
5.9.9 Reset maintenance command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
6. TROUBLESHOOTING GUIDE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
6.1 How to use the trouble shooting guide. . . . . . . . . . . . . . . . . . . . . . .58
6.2 States of the SCU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
6.3 Status Module LED. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

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6.4 Status Network LED. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
6.5 Fault messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
6.6 Corrective actions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
7. MAINTENANCE SCU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
7.1 Replacement of the main board. . . . . . . . . . . . . . . . . . . . . . . . . . . .66
7.2 Replacement of the interface board. . . . . . . . . . . . . . . . . . . . . . . . .66
7.3 Use of Hyper Terminal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
8. TECHNICAL SPECIFICATIONS SCU. . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
8.1 Technical specifications main board and interface board . . . . . . . .68
8.2 SCU print. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
8.3 Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
8.3.1 Connectors on the front of the SCU . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
8.3.2 Motor starter tray connections of the interface board . . . . . . . . . . . . . . 69
8.4 Inputs and outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72
8.4.1 Digital inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
8.4.2 Analog inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
8.4.3 Digital outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
8.4.4 Analog output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
9. ELECTRIC CIRCUIT DIAGRAMS SCU. . . . . . . . . . . . . . . . . . . . . . . . . . . .75
9.1 Single line and auxiliary circuit diagrams. . . . . . . . . . . . . . . . . . . . .75
9.1.1 Direct On Line starter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
9.1.2 Star-Delta starter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
9.1.3 Forward Reverse starter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
9.1.4 Dual Speed starter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
9.2 Mains configurations SCU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83
9.2.1 Single phase supply (L-N) I < 64A . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
9.2.2 Three phase supply without neutral. I < 64 A . . . . . . . . . . . . . . . . . . . . 84
9.2.3 Three phase supply without neutral. I > 64 A . . . . . . . . . . . . . . . . . . . . 85
9.2.4 Three phase supply with neutral. I < 64 A. . . . . . . . . . . . . . . . . . . . . . . 86
9.2.5 Three phase supply with neutral. I > 64 A. . . . . . . . . . . . . . . . . . . . . . . 87
10. GLOSSARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88
11. INDEX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89

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version 5.0 6
ABOUT THIS MANUAL
Introduction
This manual describes the Starter Control Unit (SCU), a component of Clink II motor management system of
Eaton Holec, part of Eaton Electric Europe.
This manual addresses:
• the system engineer of a process control system that has to communicate with Clink II.
• commissioning engineers and maintenance personnel.
Note
Use this manual with SCU embedded software version 4.x.
Use of symbols and conventions
Throughout this manual notes are given to alert you to possible injury to people or damage to equipment under
specific circumstances. See table 2.
Warning
Only personnel familiar with DeviceNet™ devices and associated machinery should plan or
implement the installation, start-up, configuration and subsequent maintenance of Clink II
components. Failure to comply may result in personal injury and/or equipment damage.
Warning
Clink II modules contain ESD (Electrostatic Discharge) sensitive parts and assemblies. Static control
precautions are required when installing, testing, servicing, or repairing these assemblies.
Component damage (including degradation or malfunctioning of the performance) may result if ESD
control procedures are not followed.
Note
Clink II is an innovated version of Clink. Although the principle of protection has not been changed, a number
of important alterations and additions have been effectuated. As a consequence Clink II and Clink parts are not
exchangeable.
Trademarks
• RSNetWorx™ for DeviceNet is a trademark of Rockwell Automation, Allen-Bradley.
• Windows™ is a trademark of Microsoft Corporation.
Table 2: Warning symbols and conventions
Symbol or
convention Name Description
Note - Identifies information that is especially important for successful
application and understanding of the product
Warning Identifies information about practices or circumstances that can
lead to personal injury or death, property damage, or economic
loss. Warnings help you to:
• Identify a hazard
• Avoid the hazard
• Recognize the consequences
Warning ESD Identifies information about practices or circumstances that can
cause a transfer of electrostatic charge that might cause damage
to Clink II components. See 3.2 on page 11.

CLINK II SCU MANAGER
version 5.0 7
Protocol trademarks:
• ModbusTM
•Profibus
TM
•ControlNet
TM
• Data Highway PlusTM

CLINK II SCU MANAGER
introduction version 5.0 8
1 INTRODUCTION
1.1 Audience SCU manual
This manual of the Starter Control Unit (SCU) is designed to be used by three user categories:
1 System engineers who configure the process controller and design the communication between Clink II
and DeviceNet. For the system engineer the interface requirement specifications of the SCU and FCU are
included in the SCU/FCU manuals.
2 Commissioning engineers who install and configure the Clink II system.
3 Maintenance personnel.
1.2 Required knowledge
1.2.1 Commissioning and maintenance personnel
• Electrical engineer education on a medium level. Qualification according to local regulations.
• Personnel should know how to employ the materials, equipment and procedures necessary to prevent
damage to components caused by Electrostatic Discharge.
• Experience with Microsoft Windows™.
1.2.2 System engineer
• Knowledge and experience in the field of system design for industrial automation.
• Knowledge of and experience with DeviceNet™ and RSNetWorx™.
1.3 How to use the Clink II manuals
1.3.1 Using the SCU manual
Refer to the SCU manual for information regarding:
• Design and layout
• Functions and parameter settings
• Commands
• Troubleshooting
• Maintenance
• Technical specifications
• Electrical circuit diagrams
• Interface requirements specification
1.3.2 Using the System Overview
See the Clink II System Overview manual for:
• An introduction to Clink II
• Information regarding DeviceNet cable connections and power supply connections
• Technical specifications of Clink II components other than the FCU or SCU
• An overview of power supply configurations
• Diagrams of Measurement Interface Unit configurations

CLINK II SCU MANAGER
introduction version 5.0 9
Note
For project specific information (e.g. technical specifications of a Central Interface Unit) see the project
documentation.
1.3.3 Using the LCU-5 Manual
See the Clink II LCU-5 Manual for:
• An introduction to LCU-5
• The parts LCU-5 consists of:
• Clink II System Manager
• the SCU Manager,
• the FCU Manager
1.4 Referenced documents
1.4.1 Holec Holland documents
1 Capitole 40 manual MBO 2991.901
2 Project documentation
1.4.2 Documents from other sources
1 DeviceNet PC Card Installation Instructions, Allen Bradley, publication 1784-5.29. Website Allen Bradley:
http://www.ab.com/manuals
2 User Manual Allen-Bradley RSNetworx™ Software. Website Allen Bradley: http://www.ab.com/manuals
3 DeviceNet RS-232 interface module installation instructions, Allen Bradley, publication 1770-5.6. Website
Allen Bradley: http://www.ab.com/manuals
4 DeviceNet Specifications Volume II, ODVA. Website ODVA: http:\\www.odva.org
5 European standard EN 100015-1 Protection of electrostatic sensitive devices, part 1 general require-
ments.

CLINK II SCU MANAGER
description of the starter control unit version 5.0 10
2 DESCRIPTION OF THE STARTER CONTROL UNIT
2.1 Location
The SCUs are accommodated in the vertical cable-entry compartment of the Capitole cubicle. In this way they
are fully separated from the primary motor starter circuits. Up to 16 Starter Control Units can be mounted, one
on top of the other, in a common withdrawable cassette. The pitch is identical to that of the adjacent switchgear
compartment so that each SCU is in line with its own motor starter tray.
2.2 Function
The SCU fully autonomously, monitors and protects the allocated motor. In addition, it controls the motor starter
in accordance with the DCS commands and sends all actual motor data to the higher control system (for
example PLC). For a detailed description of SCU functions see chapter 5 on page 15.
2.3 History
In 2003 the FCU of the Clink II system is enhanced with new functions: the automatic restart function and the
earth leakage function. For more details see the Clink II FCU Manual version 4.0 and higher. As a consequence
for the SCU the analog input channel is no longer present.The description of this analog input has been
removed from this manual.
2.4 Design and layout
See figure 1 for the location of the main components.
Figure 1: Layout of the SCU main board
MODULE
NETWORK A
NETWORK B
RS 232
ELCO's
Jumper SCU/FCU
SF
X1
LH
Jumper Earth
Leakage Range
H = 0.3 - 6 A.
L = 0.03 - 0.6 A

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safety instructions version 5.0 11
3 SAFETY INSTRUCTIONS
3.1 Safety aspects Capitole 40
For each plant, a central housing is installed for the central components. The housing for the Starter and
Feeder Control Units is located in the various vertical cable-entry compartments of the Capitole 40 switchboard.
For commissioning and maintenance of Clink II it is not necessary to work in the immediate vicinity of high
voltage carrying parts. Therefore no special high voltage safety measures are required.
Warning
Always consult the Capitole 40 user manual when working in the vicinity of parts that may carry high voltages
(bus bar systems, cables).
3.2 Safety instructions Clink II
Warning
Only personnel familiar with DeviceNet™ devices and associated machinery should plan or
implement the installation, start-up, configuration and subsequent maintenance of Clink II
components. Failure to comply may result in personal injury and/or equipment damage.
Warning
One of the strong features of Clink II is the possibility to replace units while keeping the Clink II system
operational. The replacement of Clink II parts should always be reported and executed according to
local safety procedures.

CLINK II SCU MANAGER
commissioning version 5.0 12
4 COMMISSIONING
4.1 Placing an SCU
All SCU’s are placed in the cassette at the factory.
Note
All nodes are already commissioned in the factory according to project specifications.
In case you want to add more than one SCU or other devices to an existing network, add one device at a time
before commissioning nodes (see the System Overview manual). It’s not possible to commission more than
one node at a time.
4.2 Checking the jumper setting
When a unit (SCU) is placed in the cassette, the software checks the settings in the EEPROM. The settings
must be right and fit the jumper setting (SCU or FCU) of the print. When the settings are right, the SCU program
is started. The status of the Module LED is green, indicating normal operation (see also “Status Module LED”
on page 60).
When the settings are wrong or do not fit the current jumper setting the print will be in stand-by mode and the
Module LED flashes green. The SCU needs commissioning because of missing, incomplete or incorrect
configuration. Commissioning consists of providing the SCU with a node number and adjust the correct baud
rate for communicating on DeviceNet. See Use of Hyper Terminal‚ page 67.
4.3 Setting the power supply configuration
The network power supply configuration of each SCU must have been set in order to enable the SCU to test
the power supply and generate an error message ‘no power’ (Module LED ‘off’).
Network power supply
The network power supply configuration is set via LCU-5. Select: SCU Manager - Unit - Properties - tab System
Configuration, see table 3.
General power supply
The general power supply configuration (when applicable) is set via LCU-5. Select: SCU Manager - Unit -
Properties - tab System Configuration, see table 4.
Table 3: Setpoint System Configuration
Name Description Parameter
type
System configuration NPS A
NPS B Setpoint
Table 4: Setpoint System Configuration
Name Description Parameter
type
System configuration GPS A
GPS B Setpoint

CLINK II SCU MANAGER
commissioning version 5.0 13
Local power supply
The local power supply configuration is set via LCU-5. Select: SCU Manager - Unit - Properties - tab System
Configuration, see table 5.
4.4 Putting the SCU into operation
Power the Clink II system.
The SCU can be in six different operational modes. See figure 2 for an overview of transitions, modes and
corresponding Module LED signals. See also Troubleshooting guide‚ page 58
Table 5: Setpoint System Configuration
Name Description Parameter
type
System configuration LPS Setpoint
Nonexisting
Device Self Testing
Standby
Operational
Major Recoverable Fault Major Unrecoverable Fault
Power
Applied
Test
Passed
Identity Object
Reset Service
(from any state
except
Maj. Unrec. Fault)
Power Loss
Test
Failed
Major
Recoverable
Faults
Major
Unrecoverable
Faults
Deactivated Activated
Minor
Fault
Fault
Corrected
Major
Recoverable
Faults
Led: Off
Led: Flashing Red/Green
Led: Flashing Green
Led: Solid Green
Led: Flashing Red Led: Solid Red

CLINK II SCU MANAGER
commissioning version 5.0 14
Figure 2: Operational modes SCU (Led = Module Led)

CLINK II SCU MANAGER
functional description scu version 5.0 15
5 FUNCTIONAL DESCRIPTION SCU
5.1 Introduction
This chapter describes all functions of the SCU. The functions are grouped into:
• measurement: see 5.2 on page 15
• digital and inputs: see 5.3 on page 25
• digital and analog outputs: see 5.4 on page 26
• motor control: see 5.5 on page 29
• motor protection: see 5.8 on page 44
• monitoring of diagnostic and maintenance data: see 5.9 on page 54
5.2 Measurement
The Starter Control Unit measures a number of quantities which can be read-out by both LCU-5 and the
process controller. These quantities are used internally as input signals for the various protective devices. In
the following paragraphs the measuring method for each quantity is explained and it is indicated where the
measured quantities can be read-out. The accuracy of the measured values is stated and, if necessary, the
configuration method for a measurement is given.
5.2.1 Mains voltage
The voltage measurement mode (phase/phase or phase/neutral) is set via LCU-5. Select: SCU Manager - Unit
- Properties - tab Meas, see table 6.
Calculation
The mains voltage Lxis measured by the Measurement Interface Unit. The Starter Control Unit calculates the
effective value of the phase and the connected voltage using the following formula:
Table 6: Mains Voltage parameters
Name Range Unit Parameter
type
Voltage Measurement
Mode LL LN
L1N
L2N
L3N
Note
In case of single phase select L1N, L2N or L3N.
-Setpoint
Mains voltage 0 - 862 V Actual
U1
T
--- u2
0
T
∫td=

CLINK II SCU MANAGER
functional description scu version 5.0 16
U = RMS value of the mains voltage
u = Instantaneous value of the mains voltage
In order to calculate this value, 16 samples are taken so that up to and including the 8th harmonic is taken into
consideration in the calculation.
Note
• The accuracy of the measured value is ± 2%.
• The displayed value of the mains voltage is the voltage measured between phases (phase-phase) except
in case of a single phase motor where the voltage between line and neutral is displayed.
5.2.2 Motor current
The motor current is measured by means of transformers which are placed in the Measurement Interface Unit.
For application of the different types of Measurement Interface Units see Mains configurations SCU‚ page 83.
The nominal current and auxiliary current transformer ratio are set via LCU-5.
Select: SCU Manager - Unit Properties - tab Meas, see table 7.
Note
The auxiliary current transformer ratio is the ratio between the primary and secondary current of the auxiliary
current transformer. If no current transformer is applied, the ratio must be set to 1.
The Motor Current can be read-out via LCU-5.
Select: SCU Manager - Module - Measurement. See table 8.
The measured values are representative for the phase currents and serve as input for the following protection
functions:
• Thermal protection, stall: 5.8.4 on page 48
• Thermal protection, motor overload: 5.8.5 on page 49
• Phase unbalance: 5.8.6 on page 50
• Process underload: 5.8.8 on page 51
• Process overload: 5.8.9 on page 52
Table 7: Setpoints nominal current and auxiliary current transformer ratio
Name Range Unit Parameter
type
Nominal Current MIU 1 - 64 A Setpoint
Auxiliary CT Ratio 1 - 1200 - Setpoint
Table 8: Motor current parameter
Name Range Unit Parameter
type
Motor Current L1 0-10.00 I/In Actual
Motor Current L2 0-10.00 I/In Actual
Motor Current L3 0-10.00 I/In Actual
Motor Current L1 0-1,200.000 A Actual

CLINK II SCU MANAGER
functional description scu version 5.0 17
Calculation
The Starter Control Unit calculates the effective value of the current using the following formula:
In order to calculate this value, 16 samples are taken so that up to and including the 8th harmonic is taken into
consideration in the calculation. To attain the required accuracy, it must be synchronised with the mains
frequency using a so-called Phase Locked Loop circuit, abbreviated to PLL
I = RMS value of the current
i = Instantaneous value of the current
Note
The accuracy of the measured value is ± 2.5% of In
5.2.3 Earth leakage current
The purpose of this measurement is to detect an earth leakage current caused by a.o.:
• Disruptive discharge between motor winding and earth
• Deteriorated insulation between motor winding and earth
• Short-circuit between one of the phases and earth.
The earth leakage current is measured with a so-called 'core balance' current transformer. The three phases
conductors are led through the hole of the transformer so that the transformer measures the vectorial sum of
the 3 phase currents. Under normal operating conditions the vectorial sum is 0. If, due to a fault, the sum current
is no longer 0, this will be detected in the secondary winding.
Earth leakage current serves as input signal for the earth leakage protective function and can be read-out via
LCU-5. Select: SCU Manager - Module Measurement.
Calculation
The Starter Control Unit calculates the effective value of the earth leakage current using the following formula:
I = RMS value of the earth leakage current
i = Instantaneous value of the earth leakage current
Motor Current L2 0-1,200.000 A Actual
Motor Current L3 0-1,200.000 A Actual
Table 9: Earth leakage current parameter
Name Range Unit Parameter
type
Earth leakage current 0-6.0 A Actual
Table 8: Motor current parameter
Name Range Unit Parameter
type
I1
T
--- i2td
0
T
∫
=

CLINK II SCU MANAGER
functional description scu version 5.0 18
In order to calculate this value, 16 samples are taken so that up to and including the 8th harmonic is taken into
consideration in the calculation.
Note
The accuracy of the measured value is ± 2.5%.
5.2.4 Motor temperature rise
Motor temperature-rise is calculated in the Starter Control Unit by means of a thermal model of the motor and
is used to protect the motor under all operating conditions against overload.
The model - see figure 3 on page 18 - determines the average temperature-rise of the copper winding (Tcu)
and the stator iron packet ((Tfe) from the copper and iron loss.
Tcu serves as input for the stall and motor overload protection and can be read-out via LCU-5. Select: SCU
Manager - Module Measurement.
Figure 3: Thermal model
In the model the following parameters or dependent variables can be distinguished (see table 10):
Table 10: Parameters and dependent variables in the thermal model
Para-
meter Name
Pcu copper loss
Ccu thermal capacity of the copper
Rcufe thermal resistance between copper and iron
Pfe iron loss
I1
T
--- i2td
0
T
∫
=
Rcufe
Rfeamb_on
Rfeamb_off
Pfe
Pcu Ccu1 Ccu2 Cfe1 Cfe2
S1 S2 S3
Pcufe Pfeamb
Pccu Pcfe

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functional description scu version 5.0 19
Principle of operation
Pcu represents the copper loss which varies proportionally to the square of the motor current.
Pfe represents the iron loss which is constant when the mains voltage and the mains frequency are constant.
Due to the heat flows caused by these loss sources, the thermal capacities are charged, resulting in
temperature differences over the thermal resistances.
Via Rcufe the copper yields heat to the iron (Pcufe) and the iron yields heat to the environment (Pfeamb) via
Rfeamb_on when the motor is running and via Rfeamb_off when the motor is off. These heat resistances together
with Cfe and CCU determine the heating-up respectively cooling-down time constant of the motor.
If the motor is running with a constant load, a thermal equilibrium will be reached after some time. This means
that the thermal capacities are charged and that the copper and iron temperature-rise will remain constant.
The model is dimensioned in such a way that at nominal motor current and thermal equilibrium, the copper
temperature-rise will be equal to the value entered as maximum temperature-rise via LCU-5. Select: SCU
Manager - Module Protection - Settings - tab Motor.
Figure 4: Temperature rise of a 5.5 kW motor after cold start and nominal load
Cfe thermal capacity of the iron
Rfeamb_on thermal resistance between iron and environment when the motor is running
Rfeamb_off thermal resistance between iron and environment when the motor is off.
Tcu copper temperature-rise
Tfe iron temperature-rise
Table 10: Parameters and dependent variables in the thermal model
Para-
meter Name
Tcu
Tfe
T_ambient t (min)
T_stall
T_nom
Temp. rise

CLINK II SCU MANAGER
functional description scu version 5.0 20
Figure 5: Temperature rise of a 5.5 kW motor after cold start and switch-off due to overload
Cooling ratio
In order to simulate the motor temperature as accurately as possible, one switches, dependent on the operating
status of the motor, between Rfeamb_off (decisive for cooling time constant) and Rfeamb_on (decisive for
warming-up time constant). The ratio between the two time constants is called cooling ratio and is set via LCU-
5. Select: SCU Manager - Module Protection - Settings - tab Motor.
For motors with built-in ventilation the cooling ratio is standard set at 10. In case of external cooling the cooling
ratio value has to be determined for each separate case.
Initial temperature thermal model
Each time when the supply voltage of the system is switched on, the thermal model is set, for safety reasons,
at the copper and iron temperature-rise (maximum temperature-rise) of a warmed-up motor and continues to
calculate on that basis. The value maximum temperature-rise can be set via LCU-5. Select: SCU Manager -
Module Protection - Settings - tab Motor. Because of this, the motor can also be protected against short or long
mains interruptions. After switching on the motor and irrespective of the load, the calculated temperature-rise
and the real temperature-rise of the motor will correspond within the allowed deviation.
T_ambient t (min)
T_nom
Temp. rise
t
I motor
Inom
0
I start
Tcu
Temp. rise
interlock level
Time to reset