SEW-Eurodrive MOVIFIT FC User manual

Drive Technology \ Drive Automation \ System Integration \ Services
Manual
MOVIFIT
®
FC
Functional Safety with S12 Safety Option
Edition 07/2013 20087756 / EN

SEW-EURODRIVE—Driving the world

Manual – MOVIFIT®-FC – Functional Safety with S12 Safety Option 3
Contents
Contents
1 General information ............................................................................................ 9
1.1 How to use this documentation................................................................... 9
1.2 Structure of the safety notes ....................................................................... 9
1.2.1 Meaning of signal words.............................................................. 9
1.2.2 Design of the section-related safety notes................................... 9
1.2.3 Design of the embedded safety notes ......................................... 9
1.3 Rights to claim under warranty ................................................................. 10
1.4 Content of the documentation................................................................... 10
1.5 Exclusion of liability................................................................................... 10
1.6 Other applicable documentation ............................................................... 10
1.7 Product names and trademarks................................................................ 10
1.8 Copyright................................................................................................... 10
2 Safety notes....................................................................................................... 11
2.1 General information .................................................................................. 11
2.2 Target group ............................................................................................. 11
2.3 Designated use ......................................................................................... 12
2.4 Transportation and storage....................................................................... 12
2.5 Installation................................................................................................. 13
2.6 Definitions ................................................................................................. 13
3 Safety concept................................................................................................... 14
3.1 Safety concept for MOVIFIT®FC frequency inverters ............................. 14
3.1.1 Description of the function ......................................................... 14
3.1.2 MOVIFIT®FC block diagram..................................................... 15
3.1.3 Restrictions ................................................................................ 15
3.2 Safety concept of S12 safety option ......................................................... 16
3.3 Drive safety functions................................................................................ 17
3.3.1 STO – Safe Torque Off.............................................................. 17
3.3.2 SS1(a) – Safe Stop 1................................................................. 18
3.3.3 SS1(c) – Safe Stop 1................................................................. 19
3.3.4 SLS – Safely Limited Speed...................................................... 20
3.3.5 SDI – Safe Direction .................................................................. 21
3.4 Safety concept of Assist S12 .................................................................... 22
3.4.1 Safety parameters ..................................................................... 22
3.4.2 Test concept and test procedure ............................................... 22
4 Safety conditions .............................................................................................. 24
4.1 Notes on stop categories .......................................................................... 24
4.2 Nameplates............................................................................................... 25
4.2.1 Nameplate position.................................................................... 25
4.2.2 Nameplate of complete unit....................................................... 25
4.2.3 Description of FS logo ............................................................... 26
4.3 Installation requirements........................................................................... 26
4.4 Sensor and actuator requirements............................................................ 27
4.5 Startup requirements ................................................................................ 27

4Manual – MOVIFIT®-FC – Functional Safety with S12 Safety Option
Contents
4.6 Operational requirements ......................................................................... 27
5 Hazard caused by a coasting drive ................................................................. 28
6 Electrical installation ........................................................................................ 29
6.1 Installation instructions.............................................................................. 29
6.1.1 UL-compliant installation............................................................ 29
6.2 Safe disconnection of MOVIFIT®.............................................................. 30
6.2.1 MOVIFIT®FC ............................................................................ 30
6.2.2 Connection example, power bus ............................................... 32
6.2.3 Safety-related stopping with S12 safety option.......................... 33
6.3 S12 safety option – electrical installation .................................................. 34
6.3.1 Terminal assignment ................................................................. 34
6.3.2 Safety-related inputs (F-DI.) ...................................................... 37
6.3.3 Safety-related outputs (F-DO. and F-DO_STO) ........................ 45
6.4 Incremental encoder EI7C FS................................................................... 51
6.4.1 Properties .................................................................................. 51
6.4.2 Installation.................................................................................. 51
7 Safety functions of the S12 safety option....................................................... 57
7.1 STO – Safe Torque Off ............................................................................. 57
7.1.1 Description of the function ......................................................... 57
7.1.2 Activation ................................................................................... 58
7.1.3 Status......................................................................................... 58
7.1.4 Parameter.................................................................................. 58
7.2 SS1(c) – Safe Stop 1 ................................................................................ 59
7.2.1 Description of the function ......................................................... 59
7.2.2 Activation ................................................................................... 59
7.2.3 Status......................................................................................... 59
7.2.4 Parameter.................................................................................. 59
7.3 SS1(a) – Safe Stop 1 ................................................................................ 60
7.3.1 Description of the function ......................................................... 60
7.3.2 Activation ................................................................................... 61
7.3.3 Status......................................................................................... 61
7.3.4 Parameter.................................................................................. 61
7.4 SLS – Safely Limited Speed ..................................................................... 62
7.4.1 Description of the function ......................................................... 62
7.4.2 Activation ................................................................................... 63
7.4.3 Status......................................................................................... 63
7.4.4 Error response ........................................................................... 63
7.4.5 Parameter.................................................................................. 64
7.4.6 Speed filter determination.......................................................... 64
7.5 SDI – Safe Direction ................................................................................. 66
7.5.1 Description of the function ......................................................... 66
7.5.2 Activation ................................................................................... 67
7.5.3 Status......................................................................................... 67
7.5.4 Error response ........................................................................... 67
7.5.5 Parameter.................................................................................. 67

Manual – MOVIFIT®-FC – Functional Safety with S12 Safety Option 5
Contents
7.6 Safety-related inputs ................................................................................. 68
7.6.1 Description of the function ......................................................... 68
7.6.2 Connection type......................................................................... 68
7.6.3 Parameter.................................................................................. 70
7.7 Safety-related outputs............................................................................... 71
7.7.1 Description of the function ......................................................... 71
7.7.2 Parameter.................................................................................. 71
7.8 Function assignment................................................................................. 72
7.8.1 Parameter.................................................................................. 72
7.9 Test mode ................................................................................................. 73
7.9.1 Description of the function ......................................................... 73
7.9.2 Activation ................................................................................... 73
7.9.3 Status......................................................................................... 73
7.10 Coasting time measurement ..................................................................... 74
7.10.1 Definition.................................................................................... 74
7.10.2 Description of the function ......................................................... 74
7.10.3 Activation ................................................................................... 75
7.10.4 Parameter.................................................................................. 75
8 Startup................................................................................................................ 76
8.1 General startup instructions ...................................................................... 76
8.2 Startup variants......................................................................................... 76
8.2.1 Startup with default parameter setting (without "Assist S12"
parameterization tool ................................................................. 76
8.2.2 Startup for independent operation ............................................. 77
8.2.3 Startup with PROFIsafe connection .......................................... 77
8.3 Setting the safety function parameters ..................................................... 78
8.3.1 Requirements ............................................................................ 78
8.3.2 Procedure .................................................................................. 78
8.4 Startup of the fieldbus and the higher-level F-PLC ................................... 80
8.4.1 Requirements ............................................................................ 80
8.4.2 Setting the PROFIsafe address................................................. 80
8.4.3 Configuring the S12 safety option in STEP 7 ............................ 82
8.5 Verification and validation ......................................................................... 86
8.5.1 Overview.................................................................................... 86
8.5.2 Verification................................................................................. 86
8.5.3 Validation................................................................................... 88
9 Assist S12 .......................................................................................................... 89
9.1 Structure of the user interface................................................................... 89
9.1.1 Menu bar.................................................................................... 90
9.1.2 Parameterization steps.............................................................. 90
9.1.3 Tool bar...................................................................................... 91
9.1.4 Parameterization window........................................................... 91
9.1.5 Plausibility error indication......................................................... 92
9.1.6 Status bar .................................................................................. 92
9.1.7 Change password...................................................................... 93

6Manual – MOVIFIT®-FC – Functional Safety with S12 Safety Option
Contents
9.2 Data management .................................................................................... 94
9.2.1 Project-relevant files .................................................................. 94
9.2.2 Data management with non-configured S12 safety option ....... 95
9.2.3 Data management with configured S12 safety option .............. 96
9.3 Parameterization....................................................................................... 97
9.3.1 Parameter setting ..................................................................... 97
9.3.2 Parameterization procedure ...................................................... 98
9.3.3 Changing the parameter settings............................................. 101
9.3.4 Parameter display.................................................................... 102
9.4 Device data ............................................................................................. 102
9.5 Status displays........................................................................................ 102
9.6 Safety functions ...................................................................................... 103
9.6.1 Overview.................................................................................. 103
9.6.2 Safety function status .............................................................. 104
9.6.3 F-DI inputs ............................................................................... 104
9.6.4 F-DO outputs ........................................................................... 106
9.6.5 Test mode................................................................................ 106
9.7 Process data ........................................................................................... 107
9.8 Encoder................................................................................................... 107
9.9 Error memory .......................................................................................... 108
10 Data exchange................................................................................................. 109
10.1 Introduction ............................................................................................. 109
10.2 F periphery access of the S12 safety option in STEP 7.......................... 110
10.2.1 F periphery DB of S12 safety option........................................ 110
10.2.2 F user data of S12 safety option.............................................. 112
10.2.3 Activation examples for the S12 safety option......................... 116
11 Response times............................................................................................... 120
12 Service ............................................................................................................. 121
12.1 Diagnostic LEDs ..................................................................................... 121
12.1.1 "FDI.." and "FDO.." LEDs ........................................................ 122
12.1.2 "F-FUNC" LED......................................................................... 122
12.1.3 "F-STATE" LED ....................................................................... 123
12.2 Error states of the S12 safety option....................................................... 123
12.2.1 Error in the safety module........................................................ 123
12.2.2 PROFIsafe timeout .................................................................. 123
12.2.3 Safety diagnostics using PROFIBUS DP................................. 124
12.2.4 Safety diagnostics via PROFINET IO...................................... 124
12.3 Diagnostics with Assist S12 .................................................................... 125
12.3.1 Status displays......................................................................... 125
12.3.2 Error memory........................................................................... 128
12.4 Unit replacement..................................................................................... 129
12.4.1 Replacing the EBOX................................................................ 130
12.4.2 Replacing the ABOX with/without EBOX ................................. 131
12.5 Error table of the S12 safety option ........................................................ 132

Manual – MOVIFIT®-FC – Functional Safety with S12 Safety Option 7
Contents
13 Parameter description .................................................................................... 137
13.1 General information ................................................................................ 137
13.1.1 10122.7 IO error effects........................................................... 137
13.1.2 10122.10 PROFIsafe fieldbus.................................................. 137
13.1.3 10122.2 Encoder type.............................................................. 137
13.1.4 10122.8 Maximum motor speed (n1)....................................... 137
13.1.5 10122.9 Minimum motor speed (n2)........................................ 138
13.2 F-DI ......................................................................................................... 138
13.2.1 Safety-related digital inputs ..................................................... 138
13.2.2 Diagnostics .............................................................................. 138
13.3 F-DO ....................................................................................................... 139
13.3.1 10124.6 F-DO-STO line diagnostics........................................ 139
13.3.2 10124.9 F-DO-STO test duration (t1) ...................................... 139
13.3.3 10124.12 F-DO-STO wire break monitoring............................ 139
13.3.4 10124.2, 10124.3 F-DO0/1 connection type............................ 140
13.3.5 10124.4, 10124.5 F-DO0/1 line diagnostics ............................ 140
13.3.6 10124.7, 10124.8 F-DO0/1 test duration (t2, t3)...................... 140
13.3.7 10124.10, 10124.11 F-DO0/1 wire break monitoring............... 140
13.4 STO / SBC .............................................................................................. 141
13.4.1 10125.3 STO delay (t1) ........................................................... 141
13.4.2 10125.2 STO status display delay (t2)..................................... 141
13.4.3 10125.4 Permitted coasting time (t3)....................................... 141
13.5 SS1 ......................................................................................................... 141
13.5.1 10126.2 Function..................................................................... 141
13.5.2 10126.3 SS1c delay (t1) .......................................................... 142
13.5.3 10126.6 SS1a ramp monitoring delay (t2)............................... 142
13.5.4 10126.5 SS1a ramp time (t3)................................................... 142
13.5.5 10126.7 SS1a distance to ramp (n1) ....................................... 142
13.5.6 10126.4 SS1a STO function selection delay (t4)..................... 142
13.6 SLS 0, 1, 2, 3 .......................................................................................... 143
13.6.1 10128.2 – 10131.2 Function.................................................... 143
13.6.2 10128.3 – 10131.3 Limit speed, positive (n1).......................... 143
13.6.3 10128.4 – 10131.4 Limit speed, negative (n1) ........................ 143
13.6.4 10128.5 – 10131.5 Distance to limit speed (n3) ...................... 143
13.6.5 10128.6 – 10131.6 SDI function .............................................. 143
13.7 SLS (general).......................................................................................... 144
13.7.1 10127.4 Ramp monitoring delay (t1) ....................................... 144
13.7.2 10127.2 Ramp time (t2)........................................................... 144
13.7.3 10127.3 Distance to ramp (n4) ................................................ 144
13.7.4 10127.5 Error response to overspeed ..................................... 144
13.7.5 10127.6 Speed filter................................................................. 144
13.7.6 10127.7 SDI tolerance............................................................. 145
13.8 Function assignment............................................................................... 145
13.8.1 Safety-related inputs................................................................ 145
13.8.2 Safety-related outputs.............................................................. 145

8Manual – MOVIFIT®-FC – Functional Safety with S12 Safety Option
Contents
14 Application examples ..................................................................................... 147
14.1 Example 1: Independent operation ......................................................... 147
14.2 Example 2: PROFIsafe connection ........................................................ 149
15 Technical data ................................................................................................. 151
15.1 Safety characteristics.............................................................................. 151
15.1.1 Overall assembly: S12 safety option ....................................... 151
15.1.2 Extended safety class for safety-related digital inputs
and outputs.............................................................................. 152
15.1.3 MOVIFIT®FC .......................................................................... 152
15.2 Technical data: S12 safety option........................................................... 153
15.2.1 Voltage supply ......................................................................... 153
15.2.2 Safety-related inputs................................................................ 153
15.2.3 Sensor supply of pulse outputs................................................ 153
15.2.4 Safety-related outputs.............................................................. 154
15.2.5 Encoder interface..................................................................... 155
15.2.6 Ambient conditions .................................................................. 155
15.3 Technical data of MOVIFIT®FC (safety technology).............................. 156
16 Address list...................................................................................................... 157
Index................................................................................................................. 169

Manual – MOVIFIT®-FC – Functional Safety with S12 Safety Option 9
1
How to use this documentation
General information
1 General information
1.1 How to use this documentation
The documentation is an integral part of the product and contains important information
on operation and service. The documentation is written for all employees who assemble,
install, start up, and service this product.
The documentation must be accessible and legible. Make sure that persons responsible
for the system and its operation, as well as persons who work independently on the unit,
have read through the documentation carefully and understood it. If you are unclear
about any of the information in this documentation, or if you require further information,
contact SEW-EURODRIVE.
1.2 Structure of the safety notes
1.2.1 Meaning of signal words
The following table shows the graduation and meaning of the signal words for safety
notes, warnings regarding potential risks of damage to property, and other notes.
1.2.2 Design of the section-related safety notes
Section-related safety notes do not apply to a specific action, but to several actions per-
taining to one subject. The symbols used either indicate a general hazard or a specific
hazard.
This is the formal structure of a safety note for a specific section:
1.2.3 Design of the embedded safety notes
Embedded safety notes are directly integrated into the instructions just before the de-
scription of the dangerous action.
This is the formal structure of an embedded safety note:
•SIGNAL WORD! Type and source of hazard.
Possible consequence(s) if disregarded.
– Measure(s) to prevent the hazard.
Signal word Meaning Consequences if disregarded
DANGER! Imminent hazard Severe or fatal injuries
WARNING! Possible dangerous situation Severe or fatal injuries
CAUTION! Possible dangerous situation Minor injuries
NOTICE Possible damage to property Damage to the drive system or its envi-
ronment
NOTE Useful information or tip: Simpli-
fies handling of the drive sys-
tem.
SIGNAL WORD!
Type and source of danger.
Possible consequence(s) if disregarded.
• Measure(s) to prevent the danger.

10 Manual – MOVIFIT®-FC – Functional Safety with S12 Safety Option
1Rights to claim under warranty
General information
1.3 Rights to claim under warranty
A requirement of fault-free operation and fulfillment of any rights to claim under limited
warranty is that you adhere to the information in the documentation. Therefore read the
documentation before you start working with the unit.
1.4 Content of the documentation
This document contains additional safety-related information and conditions for opera-
tion in safety-related applications.
1.5 Exclusion of liability
You must comply with the information contained in this documentation to ensure safe
operation and to achieve the specified product characteristics and performance fea-
tures. SEW-EURODRIVE assumes no liability for injury to persons or damage to equip-
ment or property resulting from non-observance of these operating instructions. In such
cases, any liability for defects is excluded.
1.6 Other applicable documentation
This manual supplements the existing documentation and limits the application notes
according to the information below. Use this manual only together with the following doc-
uments:
• "DR.71-225, 315 AC Motors" operating instructions
•"MOVIFIT
®FC" operating instructions
• Manuals for the corresponding function level and fieldbus:
–"MOVIFIT
®Function Level "Classic"" ...
–"MOVIFIT
®Function Level "Technology""...
• "Safety-Rated Encoders – Functional Safety for AC Motors" addendum
1.7 Product names and trademarks
All product names in this documentation are trademarks or registered trademarks of
their respective titleholders.
1.8 Copyright
© 2013 – SEW-EURODRIVE. All rights reserved.
Unauthorized reproduction, modification, distribution or any other use of the whole or
any part of this documentation is strictly prohibited.

Manual – MOVIFIT®-FC – Functional Safety with S12 Safety Option 11
2
General information
Safety notes
2 Safety notes
2.1 General information
Never install or start up damaged products. Submit a complaint to the shipping company
immediately in the event of damage.
During operation, drive inverters can have live, bare and movable or rotating parts as
well as hot surfaces, depending on their degree of protection.
Removing covers without authorization, improper use as well as incorrect installation or
operation may result in severe injuries to persons or damage to property.
Refer to the documentation for additional information.
2.2 Target group
Only qualified personnel are authorized to install, startup or service the units or correct
unit faults (observe IEC 60364 or CENELEC HD 384 or DIN VDE 0100 and IEC 60664
or DIN VDE 0110 as well as national accident prevention guidelines).
Qualified personnel in the context of these basic safety notes are all persons familiar
with installation, assembly, startup, programming, parameterization and operation of the
product who possess the necessary qualifications. In addition to that, they must be fa-
miliar with the relevant safety regulations and laws, especially with the requirements of
EN ISO 13849-1 and all other standards, directives and laws specified in this documen-
tation. The above mentioned persons must have the authorization expressly issued by
the company to operate, program, configure, label and ground units, systems and cir-
cuits in accordance with the standards of safety technology.
All persons involved in any other work, such as transportation, storage, operation and
disposal, must be trained appropriately.

12 Manual – MOVIFIT®-FC – Functional Safety with S12 Safety Option
2Designated use
Safety notes
2.3 Designated use
The S12 safety option is designed for installation in the MOVIFIT®drive controller.
When installed in machines, startup of the S12 safety option (i.e. start of designated op-
eration) is prohibited until it is determined that the machine complies with the local laws
and directives. In the individual area of application, you must especially observe the Ma-
chinery Directive 2006/42/EC as well as the EMC Directive 2004/108/EC. The EMC test
specifications EN 61000-4-2, EN 61000-4-3, EN 61000-4-4, EN 61000-4-6, EN 61000-
6-2 and EN 55011 form the basis for this. EN 60204-1 must also be observed.
The S12 safety option is a parameterizable safety controller that can be used to realize
safety shutdowns and drive safety functions. The module can be used as follows:
• In emergency switching off devices
• As safety component according to Machinery Directive 2006/42/EC
• As PES for risk reduction according to IEC 61508
• In safety circuits according to EN 60204-1 and EN 60204-32
• As PES for functional safety according to IEC 62061
• As SRP/CS according to EN ISO 13849
• As device for implementing the safety functions according to EN 61800-5-2
• As logics unit for signal conversion and processing in two-hand control according to
EN 574
Observe the technical data and information on the connection requirements as provided
on the nameplate and in the documentation.
2.4 Transportation and storage
Observe the notes on transportation, storage and proper handling. Comply with the re-
quirements for climatic conditions stated in chapter "Technical data of S12 safety op-
tion".

Manual – MOVIFIT®-FC – Functional Safety with S12 Safety Option 13
2
Installation
Safety notes
2.5 Installation
The units must be installed and cooled as stipulated in the corresponding documenta-
tion, see chapter "Other applicable documentation".
Protect the S12 safety option from improper strain. Ensure that components are not de-
formed and/or insulation spaces are maintained, particularly during transportation.
Avoid contact with electronic elements and contacts.
The S12 safety option contains components that can easily be damaged by electrostatic
energy and improper handling. Prevent mechanical damage or destruction of electric
components (may pose health risk).
The following applications are prohibited unless explicitly permitted:
• Use in potentially explosive atmospheres.
• Use in areas exposed to harmful oils, acids, gases, vapors, dust, radiation, etc.
• Use in non-stationary applications.
2.6 Definitions
• The designation F-DI. stands for safety-related input.
The designation F-DO. stands for safety-related output.
The dot "." is a placeholder.
• The designation S12 is used as a generic term for all derivatives of the S12 product
series. If a particular derivative is referred to in the manual, then the complete desig-
nation is used.
• The term "safe" used in this manual refers to the classification as a safe function ac-
cording to EN ISO 13849-1.
• PROFIsafe is a technology standard for a safe fieldbus system.
• The "Assist S12" parameterization tool is a user interface for setting the parameters
of the S12 safety option.

14 Manual – MOVIFIT®-FC – Functional Safety with S12 Safety Option
3Safety concept for MOVIFIT®FC frequency inverters
Safety concept
3 Safety concept
The drive safety functions shown in this chapter are based on the standard EN 61800-
5-2.
3.1 Safety concept for MOVIFIT®FC frequency inverters
3.1.1 Description of the function
The FC version of MOVIFIT®acts as a power distributor and communication interface
with an integrated frequency inverter with a power range of 0.37 to 4 kW. It can be con-
nected with an external safety relay, an external safety controller, or the integrated S12
safety option. For a safe torque off, these units disconnect the 24 V supply voltage that
is necessary to generate a rotating field at the inverter output.
The 24V_P supply voltage (safety-related 24 V voltage supply) is connected to terminal
X29 in the ABOX and is fed to the control electronics via a plug strip, and to the power
section via the direct plug connector. The control electronics and the power section are
housed in the EBOX. The safety-related 24V_P voltage supply is routed through a po-
larity protection diode at the input of the EBOX. A switched-mode power supply ("SNT
Safety") generates a 5 V voltage from the safety-related 24 V supply for the computer
as well as the supply voltages for the output stage control.
The line voltages and motor voltages are connected to a terminal strip in the ABOX and
fed directly to the power section via a power connector.
The pulse patterns generated in the computer are conditioned in the respective control
and relayed to the circuit breaker. If the supply voltages for the controls are switched off,
no pulse patterns can be generated at the inverter output.
This kind of disconnection ensures that all active elements required to generate a pulse
pattern at the inverter output are switched off.
External connection via a safety controller that
• Is approved for at least PL d according to EN ISO 13849-1
• Disconnects with at least PL d according to EN ISO 13849-1
allows the MOVIFIT®FC units to be used for "safe torque off and safe stop 1" accord-
ing to EN 61800-5-2 and "fail-safe protection against unintended restart" according to
EN 1037, and to meet Performance Level d according to EN ISO 13849-1. The
MOVIFIT®unit supports stop categories 0 and 1 according to EN 60204-1.

Manual – MOVIFIT®-FC – Functional Safety with S12 Safety Option 15
3
Safety concept for MOVIFIT®FC frequency inverters
Safety concept
3.1.2 MOVIFIT®FC block diagram
3.1.3 Restrictions
• The safety concept is only suitable for performing mechanical work on the sys-
tem/machine components.
• A system/machine-specific risk assessment must at all costs be carried out by the
system/machine manufacturer and be observed when using the MOVIFIT®FC unit.
8889035915
M
ABOX EBOX
Terminal strip X29
Plug strip
24V
24V_P
Control
electronics Power section
CAN
interface
0V24_P
SNT
safety
22V
15V
5V
Uz-
U monitoring
24V_P
Digital input
Digital
brake ouput
Read-in
DIP switch
I
actual
22V
15V
Terminal strip
Power connector
Direct plug
Line
3x500V
Uz+ / Uz-
Uz-
Uz+
Magnet
coupler
Processor
5V
Terminal strip Terminal strip
Magnet
coupler
TF/TH evaluation
Safety relay /
S12 safety option
WARNING
Electric shock due to dangerous voltages in the ABOX. If the safety-related 24 V volt-
age is disconnected, MOVIFIT®-FC remains connected to the mains voltage.
Severe or fatal injuries.
• Switch off the power to the MOVIFIT®unit using a suitable external disconnecting
device, and wait at least 1 minute before opening the wiring space.

16 Manual – MOVIFIT®-FC – Functional Safety with S12 Safety Option
3Safety concept of S12 safety option
Safety concept
3.2 Safety concept of S12 safety option
• The S12 safety option is an integrated, safety-related electronic assembly that can
be operated with or without PROFIsafe connection. It is equipped with safety-related
inputs and outputs (F-DI, F-DO). It is available in the following 2 versions:
–S12A safety option:
• 4 safety-related inputs
• 1 safety-related 2-channel output for STO
• 2 safety-related 2-channel outputs
–S12B safety option:
• 8 safety-related inputs
• 1 safety-related 2-channel output for STO
• No other safety-related outputs
• With both safety option versions, the STO function of the internal power section of
MOVIFIT®FC can be activated with the integrated, safety-related F-DO-STO output.
• The safety concept of this assembly is based on a safe status for all safety-related
process variables. For the S12 safety option, this value is "0" for all inputs F-DI and
outputs F-DO.
• The system was designed according to IEC 61508 SIL3 and EN ISO 13849-1 Per-
formance-Level e.
• The safety-related output F-DO_STO is used to disconnect the 24 V supply to the
inverter, which achieves safety-related stopping of the drive. In this context, observe
the safety concept of the MOVIFIT®FC inverter, all conditions, and all installation
specifications in this publication.
WARNING
For the overall MOVIFIT®FC system with S12 safety option, the safety class of the
MOVIFIT®unit is decisive with respect to safe stop and safe torque off.
Severe or fatal injuries.
• MOVIFIT®FC may only be used up to Performance Level d according to EN ISO
13849-1.
• Group drive is not allowed for MOVIFIT®FC.
• Also note the constraints in the "MOVIFIT®FC" operating instructions.

Manual – MOVIFIT®-FC – Functional Safety with S12 Safety Option 17
3
Drive safety functions
Safety concept
3.3 Drive safety functions
This chapter describes the drive safety functions according to EN 61800-5-2. Some of
the drive safety functions of the S12 safety option exceed the definitions in the standard.
3.3.1 STO – Safe Torque Off
When the STO function is active, the drive inverter does not supply any power to the mo-
tor. The drive cannot generate torque. This drive safety function corresponds to a non-
controlled stop according to EN 60204-1, stop category 0.
9007201225613323
Drive safety function trips
v=Velocity
t=Time
t1= Point of time when STO is triggered
t
V
t1
INFORMATION
The motor coasts to a halt or is stopped mechanically.
Controlled standstill is preferred, if possible (see SS1).

18 Manual – MOVIFIT®-FC – Functional Safety with S12 Safety Option
3Drive safety functions
Safety concept
3.3.2 SS1(a) – Safe Stop 1
When the SS1(a) function is active, the inverter brings the motor to a standstill electri-
cally. The braking operation is controlled and monitored. The drive safety function STO
is triggered when the monitored brake curve is exceeded or when standstill is reached.
This drive safety function corresponds to a controlled stop of the drive according to EN
60204-1, stop category 1.
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Drive safety function monitoring
Drive safety function trips
v=Velocity
t=Time
t1= Point of time when SS1(a) is activated and the braking action is triggered
t2= Point of time when STO is triggered
t
V
t
1
t
2

Manual – MOVIFIT®-FC – Functional Safety with S12 Safety Option 19
3
Drive safety functions
Safety concept
3.3.3 SS1(c) – Safe Stop 1
When the SS1(c) function is active, the inverter brings the motor to a standstill electri-
cally. The drive safety function STO will be triggered after a specified, safety-related
time.
This drive safety function corresponds to a controlled stop of the drive according to EN
60204-1, stop category 1.
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Drive safety function monitoring
Drive safety function trips
v=Velocity
t=Time
t1= Point of time when SS1(c) is activated and the braking action is triggered
t2= Point of time when STO is triggered
∆t = Safety-related period of time
t
2
t
1
t
V
Δt
INFORMATION
• The SS1(c) function does not monitor the stopping of the drive.
• The safety-related period of time ∆t allows the drive to come to a stop. In the event
of a fault, the drive does not come to a stop and becomes de-energized at the time
t2(STO).

20 Manual – MOVIFIT®-FC – Functional Safety with S12 Safety Option
3Drive safety functions
Safety concept
3.3.4 SLS – Safely Limited Speed
The SLS function prevents the drive from exceeding a specified velocity. When the per-
mitted speed is exceeded, the drive safety function stops the drive (STO or SS1). At the
same time, an error response (normally STO or SS1) is triggered.
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Drive safety function monitoring
Drive safety function trips
v=Velocity
t=Time
t1= Point of time when SLS is activated
t2= Point of time when SLS is deactivated
t
V
t
1
t
2