Renishaw FORTiS-S FS User manual

#renishaw
www.renishaw.com/fortisdownloads
FORTiS-S™FS enclosed encoder system with multiple readheads
Addendum to M-6725-9016
Installation guide
M-6725-9188-01-A

2FORTiS-S enclosed encoder system with multiple readheads
This page is left intentionally blank.

3www.renishaw.com
Contents
1 Introduction to this addendum ......................................................................................................4
2 Functional Safety data declaration ..................................................................................................5
3 Safety function..................................................................................................................7
3.1 Fault exclusions .........................................................................................................7
3.2 Failure modes effects and diagnostics analysis .................................................................................7
3.3 Installation .............................................................................................................7
3.4 Commissioning test ......................................................................................................7
3.5 Evaluation unit monitoring .................................................................................................8
3.6 Maintenance............................................................................................................8
3.7 Repair.................................................................................................................8
3.8 Proof testing............................................................................................................8
4 Certication ....................................................................................................................9
5 Summary of EU declaration of conformity.............................................................................................9
6 Summary of UK declaration of conformity............................................................................................10
7 Overview of the FORTiS-S FS encoder system with multiple readheads ....................................................................10
8 Parts list......................................................................................................................11
8.1 Included in the box ......................................................................................................11
8.2 Not included / required tools ..............................................................................................12
9 Additional installation content for a multiple readhead system ............................................................................13
9.1 Mounting the encoder ...................................................................................................13
9.2 Connecting the air supply ................................................................................................13
9.3 FORTiS-S FS system with multiple readheads installation drawing ................................................................14
9.4 BiSS Safety serial interface ...............................................................................................15
9.5 Siemens DRIVE-CLiQ serial interface .......................................................................................15

4FORTiS-S enclosed encoder system with multiple readheads
1 Introduction to this addendum
This Functional Safety installation guide addendum details the additional information for the
installation and commissioning of a Functional Safety-rated multiple readhead system.
It must be read in conjunction with the FORTiS-S FS enclosed encoder system Functional Safety
installation guide and safety manual (Renishaw part no. M-6725-9016) for single readhead
systems, which provides the following contents:
• Legal notices
• Denitions
• Information for use
• Functional Safety data declaration
• Safety function
• Certication
• Summary of EU declaration of conformity
• Overview of the FORTiS-S FS encoder system
• Parts list
• Storage and handling
• Installation drawings
• Productspecication
• Installation procedure – extrusion
• Installation procedure – readhead
• Cables and serial interfaces
This installation guide addendum for multiple readheads provides the following contents and
revisions to the above:
• Functional Safety data declaration
• Safety function
• Certication
• Summary of EU declaration of conformity
• Summary of UK declaration of conformity
• Overview of the FORTiS-S FS encoder system with multiple readheads
• Parts list
• Additional content for the installation of a multiple readhead system
• Installation drawing
• Protocols

5www.renishaw.com
2 Functional Safety data declaration
Product identication FORTiS-S FS and FORTiS-N FS variants with BiSS Safety and Siemens DRIVE-CLiQ serial interfaces
Safety integrity level 2
Failure rate data 2 readheads 3 readheads 4 readheads 5 readheads 6 readheads 7 readheads 8 readheads
Random hardware failures (per hour)
– BiSS Safety serial interface
lS= 4.59E-07 lS= 6.88E-07 lS= 9.17E-07 lS= 1.15E-06 lS= 1.38E-06 lS= 1.61E-06 lS= 1.84E-06
lD= 7.99E-07 lD= 1.20E-06 lD= 1.60E-06 lD= 2.00E-06 lD= 2.40E-06 lD= 2.80E-06 lD= 3.20E-06
lDD = 7.19E-07 lDD = 1.08E-06 lDD = 1.44E-06 lDD = 1.80E-06 lDD = 2.16E-06 lDD = 2.52E-06 lDD = 2.88E-06
lDU = 7.99E-08 lDU = 1.20E-07 lDU = 1.60E-07 lDU = 2.00E-07 lDU = 2.40E-07 lDU = 2.80E-07 lDU = 3.20E-07
Random hardware failures (per hour)
– Siemens DRIVE-CLiQ serial interface
lS= 6.75E-07 lS= 9.94E-07 lS= 1.32E-06 lS= 1.66E-06 Not permitted Not permitted Not permitted
lD= 1.19E-06 lD= 1.73E-06 lD= 2.31E-06 lD= 2.89E-06
lDD = 1.07E-06 lDD = 1.56E-06 lDD = 2.08E-06 lDD = 2.60E-06
lDU = 1.19E-07 lDU = 1.73E-07 lDU = 2.31E-07 lDU = 2.89E-07
PFH (per hour) – BiSS Safety serial interface lDU = 7.99E-08 lDU = 1.20E-07 lDU = 1.60E-07 lDU = 2.00E-07 lDU = 2.40E-07 lDU = 2.80E-07 lDU = 3.20E-07
PFH (per hour) – Siemens DRIVE-CLiQ serial interface lDU = 1.19E-07 lDU = 1.73E-07 lDU = 2.31E-07 lDU = 2.89E-07 Not permitted Not permitted Not permitted
PFDavg Not applicable due to continuous demand mode
Architectural constraints Type
HFT
SFF
B
0
95%
Hardware safety integrity compliance Route 1H
Systematic safety integrity compliance Route 1S
Systematic capability SC2
Demand mode Continuous
Proof test interval Not required for continuous demand mode
Functional Safety data declaration for 2, 3, 4, 5, 6, 7 and 8 readheads
IEC 61508 safety data

6FORTiS-S enclosed encoder system with multiple readheads
ISO 13849 safety data
Failure rate data 2 readheads 3 readheads 4 readheads 5 readheads 6 readheads 7 readheads 8 readheads
MTTFD– BiSS Safety serial interface (years) 142 95 71 57 47 40 35
MTTFD– Siemens DRIVE-CLiQ serial interface (years) 96 65 49 39 Not permitted Not permitted Not permitted
Diagnostic coverage (DC) Medium (90%)
Category 3
Performance level d
Lifetime/replacement limits 20 years
TheFORTiS-SFSencodersystemprovidessafepositiondatathatsupportsthefollowingsafetysub-functionsdenedbyIEC61800-5-2:
• Safe stop 1 (SS1) and Safe stop 2 (SS2) 1
• Safe operating stop (SOS) 1
• Safelimitedacceleration(SLA)≤200m/s2
• Safeaccelerationrange(SAR)≤200m/s2
• Safelimitedspeed(SLS)≤4m/s
• Safespeedrange(SSR)≤4m/s
• Safely limited position (SLP) 1
• Safely limited increment (SLI) 1
• Safe direction (SDI)
• Safespeedmonitor(SSM)≤4m/s
1 SeethesafetyfunctionrestrictionsforthesafepositiongureforeachFORTiS-SFSencodersystemvariant.

7www.renishaw.com
3 Safety function
The FORTiS-S FS encoder system shall provide a safe position when requested by the
evaluation unit.
The following restrictions apply to this claim:
• Thesysteminstallermustperformaveriedcommissioningtestduringinstallation.
• Thesystemrepairermustperformaveriedcommissioningtestfollowingreplacementofa
system part.
• Themaximumrequestratesupportedis32kHzand16kHzforDRIVE-CLiQ.
• Electrical errors for the BiSS Safety serial interface are detected by the evaluation unit
comparing CPW and SPW content. See the data sheet BiSS Safety for RESOLUTE and
FORTiS encoders (Renishaw part no. L-9517-9884) for more information.
• Electrical errors for the Siemens DRIVE-CLiQ serial interface are detected by the evaluation
unit comparing POS1 and POS2 content. See the relevant Siemens AG evaluation unit manual
for more information.
• When installed correctly, the FORTiS-S FS encoder system has a mechanical safe position of
±1mm.
3.1 Fault exclusions
ThefollowingwillinvalidatetheFunctionalSafetycerticationoftheFORTiS-SFSencodersystem:
• Faults caused by cutting and reconnecting the cable or the use of a non-Renishaw cable that is
not approved.
• Incorrect installation.
• Dismantling.
• Operatingthesystemoutsidethelimitsspeciedinthisinstallationguide.
3.2 Failure modes effects and diagnostics analysis
All diagnosed failure modes are detected immediately except for a position discrepancy between
thetwomeasurementmethodswhichisdetectedwithin375μs.
See section 2 on page 5for a summary of the FMEDA.
NOTE: For the purposes of the FMEDA calculation the following conditions have been assumed:
3.3 Installation
For the safety function to be valid the instructions detailed in this installation guide must be
followed.
3.4 Commissioning test
The following test MUST be performed when commissioning the FORTiS-S FS encoder system
and after any repair or maintenance of the system.
Resolution check Moveeachreadheadbyaknowndistanceandconrmthatthe
position changes as expected. The tolerance for raising a fault
condition is relative to the safe position determined by the system
manufacturer.
Method: SN29500-2005-1 Environment: Ground mobile Temperature: 60°C

8FORTiS-S enclosed encoder system with multiple readheads
3.5 Evaluation unit monitoring
To achieve full system integrity the evaluation unit must continuously monitor the error condition of
each readhead in the FORTiS-S FS encoder system, and in the case of fault detection place the
system into a safe state within the process safety time.
NOTES:
1. The evaluation unit must have its Functional Safety functions enabled (as often it is a
congurationparametertoturnonFunctionalSafetyfunctionality)andmustrespondcorrectly
toaFORTiS-SFSencodersystempositionerrorag.
2. A persistent fault condition may indicate a hardware failure of the FORTiS-S FS encoder
system or an installation problem.
3. The individual readheads must be treated as separate encoder sub-systems. Each readhead
must be connected to a separate evaluation unit and its outputs as per the safety function
and must be monitored separately. In the case of an error being reported then the appropriate
action must be taken.
4. The system manufacturer and/or system installer are responsible for ensuring the safe
operation of these sub-systems: for example, ensuring the readheads do not collide with each
other.
3.6 Maintenance
Themaintenancecheckintervalswillbedenedbythesystemmanufactureraccordingtotheirrisk
assessment. There are no user-serviceable parts within the FORTiS-S FS encoder system.
The following maintenance actions are advised:
• Check the extrusion screws and readhead retaining screws are correctly tightened.
• Check for worn or damaged cables and connectors.
• Check the cable connectors are correctly tightened/located.
• Checktheairsupplyttingiscorrectlytightenedandtheairhoseiscorrectlytted.
• When the DRIVE-CLiQ interface is used check the retaining screws are correctly tightened.
3.7 Repair
• Repair of the FORTiS-S FS encoder system is only by replacement of parts.
• The replacement parts must have the same part number as the original parts.
• The repaired encoder system must be installed and commissioned in accordance with
‘Commissioning test’ on page 7.
• In the event of failure the affected parts should be returned to Renishaw for further analysis.
• UsingdamagedpartsinvalidatestheFunctionalSafetycertication.
3.8 Proof testing
Itistheresponsibilityofthesystemmanufacturertodeneanyprooftestingofthesystem.Dueto
the diagnostic coverage (DC) and safe failure fraction (SFF) required to achieve SIL2, the encoder
can only support continuous demand use.
Refer to the FORTiS-S FS enclosed encoder system Functional Safety installation guide and safety
manual(Renishawpartno.M-6725-9016)fordetailsofthefunctionalsafetycerticateandthe
EUdeclarationofconformity.

9www.renishaw.com
4 Certication
FORTiS-S FS encoder system
Functional Safety Certicate No. FSC003
SIL2
FUNCTIONAL
SAFETY
PLd
UnderthetermsofCSASIRAFunctionalSafetyCerticateSIRACASS00023/01, for the
managementandself-certicationoffunctionalsafetyactivitiesuptoSIL3/PLd.
Renishaw plc declares that the products listed by this installation guide meet the requirements of:
• IEC 61508-1:2010, IEC 61508-2:2010 and IEC 61508-3:2010
• IEC 61800-5-2:2016
• ISO 13849-1:2015 and ISO 13849-2:2012
When used as an element/subsystem in safety-related systems performing safety functions
requiring up to and including:
• SIL2 with HFT = 0 (1oo1)
• Category 3, PLd.
EUD 2021-00819
This declaration of conformity is issued under the sole responsibility of the manufacturer, Renishaw
plc.Theobjectofthedeclarationisidentiedbelow:
Product name: FORTiS-S™and FS FORTiS-N™enclosed encoder system
Description: Enclosed linear FS readhead and scale assembly
Part no.: Valid from: Description:
FS1-----------S---- -02 FORTiS-S™FSstandardsizeenclosedlinearencoders
FN1-----------S---- -02 FORTiS-N™FSnarrowsizeenclosedlinearencoders
2006/42/EC Machinery Directive
2014/30/EU Electromagnetic Compatibility (EMC)
2011/65/EU Ontherestrictionoftheuseofcertainhazardoussubstancesinelectrical
and electronic equipment – RoHS
EN ISO 12100:2010 Safety of machinery – General principles for design –
Risk assessment and risk reduction
EN ISO 13849-1:2015 Safety of machinery – Safety-related parts of control systems
Part 1: General principles for design (ISO 13849-1:2015)
EN ISO 13849-2:2012 Safety of machinery – Safety-related parts of control systems
Part 2: Validation (ISO 13849-2:2012)
EN 61326-1:2013 Electrical equipment for measurement, control, and laboratory use.
EMC requirements
Part 1: General requirements
EN 62471:2008 Photobiological safety of lamps and lamp systems
EN IEC 63000:2018 Technical documentation for the assessment of electrical and electronic
productswithrespecttotherestrictionofhazardoussubstances
The object of the declaration described above is in conformity with all relevant EU harmonisation
legislationandfullsalltherelevantprovisionswithEUdirectives:
and complies with the following technical standards:
For the full Declaration of Conformity EUD 2021-00819 see:
www.renishaw.com/productcompliance
5 Summary of EU Declaration of Conformity
EUbasedpersonauthorisedtocompilethetechnicalle:-Renishaw(Ireland)DAC,Swords
Business Park, Swords, Co. Dublin, K67 FX67, Ireland.

10 FORTiS-S enclosed encoder system with multiple readheads
6 Summary of UK declaration of conformity 7 Overview of the FORTiS-S FS encoder
system with multiple readheads
This system is an enclosed linear optical encoder designed for use in harsh industrial environments
where high-precision feedback and metrology are required. It is suitable for applications where
various slideway mechanisms are common to a particular linear axis and require multiple
readheads to provide feedback.
Based upon Renishaw’s award-winning absolute technology, the rugged non-contact design has no
internal moving parts, such as bearings or wheeled readhead carriages, thus improving the overall
reliability. Additionally, hysteresis and backlash errors associated with mechanical contact system
designs are reduced.
Inadditiontoenhancedbreakageresistance,therobuststeelscalehasacoefcientofthermal
expansion similar to the base material used in the majority of machines, reducing errors due to
thermal effects whilst increasing measurement certainty.
Renishaw’spatentedset-upLEDprovidesinstantvericationoftheencoder’ssignalstrength
andthereforeitsaccuratealignment.Thisintuitiveproceduresignicantlyreducestheneedfor
additional peripheral diagnostics equipment during installation. When combined with Renishaw’s
carefully designed installation accessories, these unique tools make installation easier and faster
comparedtotraditionalmethods,whilstbuildingcondenceinaright-rst-timeinstallation.
For information regarding FORTiS FS encoder systems with single readheads please refer to the
FORTiS-S FS enclosed encoder system Functional Safety installation guide and safety manual
(Renishaw part no. M-6725-9016).
UKD 2021-00819
This declaration of conformity is issued under the sole responsibility of the manufacturer, Renishaw
plc.Theobjectofthedeclarationisidentiedbelow:
Product name: FORTiS-S™and FS FORTiS-N™enclosed encoder system
Description: Enclosed linear FS readhead and scale assembly
Part no.: Valid from: Description:
FS1-----------S---- -02 FORTiS-S™FSstandardsizeenclosedlinearencoders
FN1-----------S---- -02 FORTiS-N™FSnarrowsizeenclosedlinearencoders
S.I. 2008 No. 1597 Supply of Machinery (Safety) Regulations 2008
S.I. 2016 No. 1091 Electromagnetic Compatibility Regulations 2016
S.I. 2012 No. 3032 TheRestrictionoftheUseofCertainHazardousSubstancesin
Electrical and Electronic Equipment Regulations 2012 - RoHS
EN ISO 12100:2010 Safety of machinery – General principles for design –
Risk assessment and risk reduction
EN ISO 13849-1:2015 Safety of machinery – Safety-related parts of control systems
Part 1: General principles for design (ISO 13849-1:2015)
EN ISO 13849-2:2012 Safety of machinery – Safety-related parts of control systems
Part 2: Validation (ISO 13849-2:2012)
EN 61326-1:2013 Electrical equipment for measurement, control, and laboratory use
EMC requirements
Part 1: General requirements
EN 62471:2008 Photobiological safety of lamps and lamp systems
EN IEC 63000:2018 Technical documentation for the assessment of electrical and electronic
productswithrespecttotherestrictionofhazardoussubstances
The object of the declaration described above is in conformity with all relevant UK Statutory
Instruments (and their amendments):
and complies with the following technical standards:
For the full declaration of conformity UKD 2021-00819 see:
www.renishaw.com/productcompliance

11www.renishaw.com
Item Description
FORTiS-S FS encoder unit The FORTiS-S FS enclosed encoder system with multiple readheads
37 mm readhead setting shim Plastic shim to be used as an installation aid
Air connection tting To enable connection to one of the encoder air purge inlets in the extrusion only
Cable connection wrench Used for securely connecting the encoder cable to the readhead
Alignment brackets
Two brackets to secure each readhead during transit and set the correct readhead alignment
during installation
IMPORTANT: Retain until installation is complete
FORTiS-S FS quality inspection
certicate Certiesspecicencoderperformanceandprovidestraceability
Yellow Functional Safety card Shows the web address for accessing the installation guide
8 Parts list
8.1 Included in the box
Siemens DRIVE-CLiQ interface Included with Siemens-only versions of FORTiS-S FS

12 FORTiS-S enclosed encoder system with multiple readheads
8.2 Not included / required tools
Item Description
5 mm torque wrench To tighten the extrusion and the readhead mounting screws
1.5 mm hex key Air bung removal (only if air purge is required)
4 mm hex key
For locking the mounting aid
For use with the M5 extrusion and M5 readhead screw options
5 mm hex key For securing of the readhead
M6 screws
2×M6×1.0screwslength≥35mmformountingthereadhead
M6×1.0screwslength≥20mmformountingtheextrusiontothemachinebed

13www.renishaw.com
1
2
9 Additional installation content for a multiple readhead system
9.1 Mounting the encoder
TheencoderisavailablewithuptoeightreadheadsforBissSafetysystemsanduptove
readheads for Siemens DRIVE-CLiQ systems.
For mounting surface preparation and mounting orientations refer to the FORTiS-S FS enclosed
encoder system Functional Safety installation guide and safety manual (Renishaw part no.
M-6725-9016).
For minimum distances between readheads and permissible cable orientations refer to the system
installation drawing; see section 9.3 on page 14 in this addendum.
NOTES:
1. It is the responsibility of the installer to ensure that readheads and their connected cable
assemblies do not meet with each other or collide with end caps.
2. Typically, for applications that require multiple readheads traversing a single extrusion, the
extrusionisxedwithonlythereadheadsmoving.PleasecontactyourlocalRenishaw
representative if your requirements are different.
3. Some of the shorter measuring lengths will not support multiple readheads, depending on
numberofreadheads,cablecongurationandcabletype.Pleasediscusswithyourlocal
Renishaw representative.
9.2 Connecting the air supply
Forxedextrusioninstallationsasdescribed(seenoteinsection 9.1) the air purge supply must be
connected to the extrusion only.
Air inlets are included in each end cap, at both ends of the extrusion. Use a suitable air supply hose
witha4mmbore.
For compatible air supply components refer to the data sheet Air ltration systems for use with
FORTiS encoders (Renishaw part no. L-9517-9982).
WARNING: Remove the blanking plug only from the position at which the purge air supply is to be
connected, or the sealing integrity may be compromised.

FS100B044SX-40NX001X
FORTiS S ML440mm / 1mm / 13RT73
2018 MADE IN UK GL12 8JR www.renishaw.com
FORTiS-S™
73QR91
FORTiS-S™
73QR91
FORTiS-S™
73QR91
FORTiS-S™
73QR91
FORTiS-S™
73QR91
FORTiS-S™
73QR91
14 FORTiS-S enclosed encoder system with multiple readheads
19.5 90
93 min ‘A’ min (see table) ‘B’ min (see table) ‘C’ min (see table)
Dimensions and tolerances in mm
ML
Cable type A B C Minimum static bend radius
Black 137 181 137 15
Green 154 216 154 31.5
Armoured 170 247 170 45
NOTES:
1. For required installation information see ‘FORTiS-S FS system installation drawings’ in the FORTiS-S FS enclosed encoder system Functional Safety installation guide and safety manual
(Renishaw part no. M-6725-9016).
2. Thearrangementofreadheadsshownisarbitraryanddoesnotrepresentadenedsequence.Itdepictstherangeofpossiblereadheadandcableorientations.
9.3 FORTiS-S FS system with multiple readheads installation drawing

15www.renishaw.com
9.4 BiSS Safety serial interface
BiSS Safety specications
Power supply for each readhead 5V±10% 1.25Wmaximum(250mA@5V)
NOTES:
1. CurrentconsumptionguresrefertoterminatedFORTiSsystems.Renishaw
encodersystemsmustbepoweredfroma5Vdcsupplycomplyingwiththe
requirementsforSELVofstandardIEC60950-1.
2. Overvoltageprotection±10V.
Ripple 200mVppmaximum@frequencyupto500kHz
Siemens DRIVE-CLiQ specications
Power supply for each readhead 24 V 1.8Wmaximum(75mA@24V),24VasperDRIVE-CLiQspecication.
24VpowerisprovidedbytheDRIVE-CLiQnetwork
NOTE:Overvoltageprotection–36Vto+36V.
Ripple 200mVppmaximum@frequencyupto500kHz
Maximum total cable length ReadheadtoDRIVE-CLiQinterface9m
(RefertoSiemensDRIVE-CLiQspecicationsformaximumcablelengthfrom
interface to the controller)
Extension cables from the FORTiS-S FS DRIVE-CLiQ interface to the controller
should be sourced directly from Siemens
Connector tightening torque M12 – 4 Nm
Vibration (interface) <100m/s2to IEC 60068-2-6
Environment protection (interface) IP67
9.5 Siemens DRIVE-CLiQ serial interface
Included with Siemens-only versions of FORTiS.

#renishaw
© 2016–2022 Renishaw plc. All rights reserved. This document may not be copied or reproduced in whole or in part, or transferred to any other
media or language by any means, without the prior written permission of Renishaw.
RENISHAW® and the probe symbol are registered trade marks of Renishaw plc. Renishaw product names, designations and the mark ‘apply
innovation’ are trade marks of Renishaw plc or its subsidiaries.
BiSS ® is a registered trade mark of iC-Haus GmbH.
Other brand, product or company names are trade marks of their respective owners.
Renishaw plc. Registered in England and Wales. Company no: 1106260. Registered office: New Mills, Wotton-under-Edge, Glos, GL12 8JR, UK.
[phone] [e-mail]
WHILE CONSIDERABLE EFFORT WAS MADE TO VERIFY THE ACCURACY
OF THIS DOCUMENT AT PUBLICATION, ALL WARRANTIES, CONDITIONS,
REPRESENTATIONS AND LIABILITY, HOWSOEVER ARISING, ARE
EXCLUDED TO THE EXTENT PERMITTED BY LAW.
RENISHAW RESERVES THE RIGHT TO MAKE CHANGES TO THIS
DOCUMENT AND TO THE EQUIPMENT, AND/OR SOFTWARE AND THE
SPECIFICATION DESCRIBED HEREIN WITHOUT OBLIGATION TO PROVIDE
NOTICE OF SUCH CHANGES.
www.renishaw.com/contact
Issued: 05.2022
Part no.: M-6725-9188-01-A