Leuze electronic RS4 User manual
ROTOSCAN RS4
Safety Laser Scanners
Original operating instructions
EN 2011/03 - 607144
We reserve the right to
make technical changes
Contents
Leuze electronic RS4 3
1 About this document.....................................................................................................................................................6
1.1 Other applicable documents.........................................................................................................................................6
1.2 Used symbols and signal words ...................................................................................................................................6
2 Safety............................................................................................................................................................................7
2.1 Proper use ....................................................................................................................................................................7
2.2 Appropriately qualified person ......................................................................................................................................7
2.3 Responsibility for safety................................................................................................................................................7
2.4 Laser.............................................................................................................................................................................8
2.5 Handling the safety sensor ...........................................................................................................................................8
2.6 Usage limits ..................................................................................................................................................................8
2.7 Guarantee the availability of the safety sensor.............................................................................................................9
2.8 Providing the company operating the machine with information...................................................................................9
2.9 Exemption of liability...................................................................................................................................................10
3 Device description ......................................................................................................................................................11
3.1 Device overview..........................................................................................................................................................12
3.2 Display elements ........................................................................................................................................................12
3.3 Mounting system (option) ...........................................................................................................................................14
3.4 ConfigPlug (option).....................................................................................................................................................14
4 Functions ....................................................................................................................................................................15
4.1 Start/restart interlock...................................................................................................................................................15
4.1.1 Start interlock..............................................................................................................................................................15
4.1.2 Restart interlock..........................................................................................................................................................15
4.2 Start test .....................................................................................................................................................................15
4.3 Automatic start/restart.................................................................................................................................................15
4.3.1 Automatic start............................................................................................................................................................15
4.3.2 Automatic restart.........................................................................................................................................................16
4.4 Dust suppression........................................................................................................................................................16
4.5 Field pair switchover...................................................................................................................................................16
4.6 Reference boundary monitoring .................................................................................................................................17
4.7 MotionMonitoring ........................................................................................................................................................17
5 Applications ................................................................................................................................................................19
5.1 Stationary danger zone guarding................................................................................................................................19
5.2 Stationary point of operation guarding........................................................................................................................20
5.3 Stationary access guarding ........................................................................................................................................21
5.4 Mobile danger zone guarding .....................................................................................................................................22
5.5 Mobile side guarding...................................................................................................................................................23
6 Mounting.....................................................................................................................................................................24
6.1 Basic infos ..................................................................................................................................................................24
6.2 Basic infos on the protective field dimensioning.........................................................................................................25
6.2.1 Handling unmonitored areas.......................................................................................................................................25
6.2.2 Protective field setup with adjacent safety sensors ....................................................................................................26
6.3 Stationary danger zone guarding................................................................................................................................28
6.3.1 Beam level height .......................................................................................................................................................29
6.3.2 Safety distance "S" .....................................................................................................................................................29
6.3.3 Additional distance "C" because of the possibility of reaching over............................................................................30
6.3.4 Machine response times, stopping time .....................................................................................................................30
6.3.5 Application-conditional additional distances for safety distance "S"...........................................................................31
6.3.6 Minimum distance "D" to the protective field contour..................................................................................................31
6.4 Stationary point of operation guarding........................................................................................................................32
6.4.1 Safety distance "S" .....................................................................................................................................................33
6.4.2 Additional distance C..................................................................................................................................................33
6.4.3 Machine response times, stopping time .....................................................................................................................33
6.4.4 Protective field and reference boundary.....................................................................................................................34
6.5 Stationary access guarding ........................................................................................................................................34
6.5.1 Safety distance "S" ....................................................................................................................................................35
6.5.2 Machine response times, stopping time .....................................................................................................................35
Contents
Leuze electronic RS4 4
6.5.3 Protective field contour and reference boundary........................................................................................................36
6.6 Mobile danger zone guarding on DTSs ......................................................................................................................36
6.6.1 Basic requirements.....................................................................................................................................................37
6.6.2 Minimum distance D ...................................................................................................................................................37
6.6.3 Protective field dimensions ........................................................................................................................................39
6.6.4 Test mode for MotionMonitoring.................................................................................................................................39
6.7 Mobile side guarding on DTSs....................................................................................................................................40
7 Technical data ............................................................................................................................................................41
7.1 Safety..........................................................................................................................................................................41
7.2 Optics..........................................................................................................................................................................41
7.3 Protective field ............................................................................................................................................................42
7.4 Warning field...............................................................................................................................................................42
7.5 Measured data............................................................................................................................................................42
7.6 Electrical power supply ..............................................................................................................................................43
7.7 Software......................................................................................................................................................................44
7.8 Ambient conditions .....................................................................................................................................................44
7.9 Dimensions, weight.....................................................................................................................................................45
8 Electrical connection...................................................................................................................................................47
8.1 Electrical power supply...............................................................................................................................................47
8.2 Interfaces....................................................................................................................................................................47
8.2.1 X1 plug interface assignment .....................................................................................................................................48
8.2.2 Interface assignment, plug X2....................................................................................................................................49
8.3 Assemble cables.........................................................................................................................................................50
8.4 Integrating the safety sensor into machine control system.........................................................................................51
8.4.1 Downstream safety circuit with start/restart interlock, contactor monitoring, without field pair switchover.................51
8.4.2 Programmable logic controller (PLC) with corresponding safety level and field pair switchover................................51
9 Parameters .................................................................................................................................................................53
9.1 Administrative parameters..........................................................................................................................................53
9.1.1 Safety Laser Scanner name.......................................................................................................................................53
9.1.2 Description..................................................................................................................................................................53
9.1.3 Start segment output ..................................................................................................................................................53
9.1.4 Stop segment output...................................................................................................................................................53
9.1.5 Output resolution ........................................................................................................................................................53
9.1.6 Serial interface baud rate............................................................................................................................................54
9.1.7 Alarm incident.............................................................................................................................................................54
9.1.8 Precalculated measured values output.......................................................................................................................54
9.1.9 2nd measured value calculation segment ..................................................................................................................54
9.1.10 3rd measured value calculation segment ...................................................................................................................54
9.2 Safety-relevant parameters ........................................................................................................................................55
9.2.1 Application ..................................................................................................................................................................55
9.2.2 Response times..........................................................................................................................................................55
9.2.3 Dust suppression........................................................................................................................................................55
9.2.4 Applicable field pair selection with scanner start ........................................................................................................56
9.2.5 Permitted field pair switchovers..................................................................................................................................56
9.3 Field pair.....................................................................................................................................................................56
9.3.1 Protective field/description..........................................................................................................................................56
9.3.2 Warning field/description ............................................................................................................................................56
9.4 MotionMonitoring ........................................................................................................................................................56
9.4.1 Vehicle width...............................................................................................................................................................56
9.4.2 Protective field side additional distance......................................................................................................................56
9.4.3 Laser scanner installation point..................................................................................................................................57
9.4.4 Warning field prerun time............................................................................................................................................57
9.4.5 Vehicle response time ................................................................................................................................................57
9.4.6 Brake wear and tear additional distance.....................................................................................................................57
9.4.7 Ambient influences additional distance.......................................................................................................................57
9.4.8 Speed with PF ............................................................................................................................................................58
9.4.9 Braking distance with PF ............................................................................................................................................58
9.4.10 Standstill monitoring ...................................................................................................................................................58
9.4.11 Creep and reverse......................................................................................................................................................58
Contents
Leuze electronic RS4 5
10 Setting the device into service....................................................................................................................................59
10.1 Before first start-up .....................................................................................................................................................59
10.2 Switching on ...............................................................................................................................................................59
10.3 Shutting down.............................................................................................................................................................59
10.4 Restart ........................................................................................................................................................................59
10.5 Starting up the replacement device ............................................................................................................................60
10.6 Starting up a safety sensor with the MotionMonitoring function.................................................................................61
11 Testing........................................................................................................................................................................66
11.1 Testing before first start-up and after machine modification.......................................................................................66
11.2 Regular test by an appropriately qualified person ......................................................................................................67
11.3 Daily functions test......................................................................................................................................................67
12 Maintenance ...............................................................................................................................................................69
12.1 Clean the front screen ................................................................................................................................................69
12.2 Clean scatter screens.................................................................................................................................................70
13 Diagnostics and removing errors................................................................................................................................71
13.1 What to do in case of failure? .....................................................................................................................................71
13.2 Operating displays of the LEDs ..................................................................................................................................71
13.3 LED warning and error displays..................................................................................................................................72
13.4 Diagnostics codes.......................................................................................................................................................73
14 Repairs .......................................................................................................................................................................78
14.1 Change the front screen .............................................................................................................................................78
15 Disposing....................................................................................................................................................................81
16 Service........................................................................................................................................................................82
17 Accessories ................................................................................................................................................................83
17.1 Accessories to choose from........................................................................................................................................83
About this document
Leuze electronic RS4 6
1 About this document
1.1 Other applicable documents
The information on the safety sensor is distributed over several documents to make working with the docu-
ments easier. You will find the documents and programs for the safety sensor in the following table:
* identifies the product that the safety sensor is installed in.
** You can download the current version of the software and all documents as PDF onthe Internet at Leuze
website.
1.2 Used symbols and signal words
Table 1.1: Warning symbols and signal words
Table 1.2: Other symbols
Purpose and target group of the document Document/software
title Source
Software for users of the machine* for safety sensor
diagnostics if a fault occurs and for machine design
engineers* for configuring the safety sensor
RS4soft Included with the product
delivery on CD-ROM**
Notes for the machine design engineer* Safe implementation
and operation
(this document)
Art. no. 607144**
Included with the product
delivery on CD-ROM
Notes for the machine design engineer* for config-
uring the safety sensor (Software RS4soft instruc-
tions)
Safe parametering Art. no. 607143**
Included with the product
delivery on CD-ROM
Additional information on ROTOSCAN RS4/AS-i Additional information
for the ROTOSCAN
RS4-4 connecting and
operating instructions
Art. no. 607060**
Included with the product
delivery on CD-ROM
Additional information on ROTOSCAN RS4/
PROFIsafe Additional information
for the ROTOSCAN
RS4-4 Laser Scanner
connecting and operat-
ing instructions
Art. no. 605054**
Included with the product
delivery on CD-ROM
Symbol for dangers
NOTICE Signal word for property damage
Indicates dangers that could damage the safety sensor if the measures for preventing
danger are not implemented.
CAUTION Signal word for minor injury
Indicates dangers that could slightly injure you if the measures for preventing danger are
not implemented.
WARNING Signal word for serious injury
Indicates dangers that could seriously or fatally injure you if the measures for preventing
danger are not implemented.
DANGER Signal word for life-threatening danger
Indicates dangers that could seriously or fatally injure you if the measures for preventing
danger are not implemented.
Symbol for tips
Texts with this symbol provide you with further information on handling the safety sensor.
ªSymbols for action steps
Text passages with this symbol instruct you to perform actions.
Safety
Leuze electronic RS4 7
2 Safety
The documents are part of the product. Non-observance presents a high risk to personal health and life.
ªObserve the documents on the CD ROM included with the product.
Alternatively you can also download the current documents on the Internet.
For an overview of other applicable documents (see chapter 1.1 „Other applicable documents“).
ªRead and observe the documents that apply for your activities in full before you workwiththe safety
sensor.
2.1 Proper use
The safety sensor is used to protect people in danger zones or at points of operation on machines and to
protect objects and machine parts against the dangers of collision.
The safety sensor may only be used after it has been put into operation in accordance with the applicable
instructions, relevant rules and regulations on occupational health and safety at work and the recognized
safety-related rules and regulations have been placed on the machine by an appropriately qualified
person.
The safety sensor must be integrated into the machine's electrical control system in such a way that an
activation of the safety function safely stops or interrupts the dangerous process before a person can be
endangered.
If the machine does not allow the dangerous movement to be stopped at all times, you may not install the
safety sensor. Do not use the safety sensor, for example, together with a press with form-locking coupling.
2.2 Appropriately qualified person
Appropriately qualified is a person that,
• has acquired adequate knowledge and skills with regard to operating the machine, the configuration
and diagnostics software and testing the safety sensor through training and practical experience and
has proven their capabilities in practice,
• and is so well versed in the applicable rules and regulations on occupational health and safety at
work and the recognized safety-related rules and regulations that he/she can evaluate the safety of
the machine,
• and has been instructed in the machine's operation and safety rules and regulations,
• and has read and understood the respective applicable instructions for the safety sensor and the
machine's operating instructions,
• and has been charged by the respective person responsible for the machine's safety with the testing
of the safety sensor.
2.3 Responsibility for safety
The responsibility for the safety-assured use of the safety sensor and compliance with the regulations and
directives that apply in the country of use lies with the machine's manufacturer and company operating the
machine.
WARNING
If the safety sensor is not selected and used correctly, severe accidents may result.
ªCarefully follow all notices regarding the safety sensor.
ªMake certain that all other people also know and observe the notices that apply to them.
Print out the relevant text parts to make reading and handling the documents easier.
Safety
Leuze electronic RS4 8
The manufacturer of the machine is responsible for:
• The safe design and construction of the machine.
• The safe implementation of the safety sensor.
• The provision of all relevant information to the operator company.
• Compliance with all regulations and directives for safely putting the machine into operation.
The operating company is responsible for:
• Instructing the operating staff.
• Maintaining the safe operation of the machine.
• Compliance with all occupational health and safety at work regulations and directives.
Passwords
Improperly set parameters on the safety sensor can cause serious accidents. The configuration of the
safety sensor is therefore protected by passwords.
ªEnsure that the passwords are kept locked away by the security officer.
ªThe people responsible for the machine's safety must ensure that the appropriately qualified person can
properly perform the tests and work on the machine and the safety sensor in accordance with their
intended use.
2.4 Laser
The safety sensor corresponds with laser class 1. Additional activities for shielding the laser beams are
not required (safe for eyes).
ªObserve the applicable legal and local regulations for operating laser equipment.
2.5 Handling the safety sensor
ªObserve the permissible environmental conditions for storage and operation.
Front screen and scatter screens
The safety sensor's front screen and scatter screens must be clean, free of damage and properly installed.
ªAvoid touching the front screen and scatter screens.
ªClean dirty screens immediately (according to these instructions).
ªHave damaged screens replaced immediately (according to these instructions).
Screwed-on cables
Improper handling can damage the safety sensor and result in safety-relevant signals not being sent. The
safety sensor's IP type of protection is only guaranteed with screwed-on plug cover caps.
ªOnly operate, transport and store the safety sensor with screwed-on control cable (X1) and PC cable
(X2) or dummy plug (X2).
2.6 Usage limits
Only on closed rooms
The safety sensor is not suitable for use outdoors or under conditions with significant temperature
fluctuations. Humidity, condensation and other weather influences can impair the safety function.
ªOnly use the safety sensor in closed rooms.
ªObserve all technical data and ambient conditions.
Industrial use only
The safety sensor is not suitable for residential areas, because it can cause radio interferences.
ªOnly use the safety sensor in industrial environments.
Laser Klasse 1
Laser Class 1
Laser de Classe 1
Safety
Leuze electronic RS4 9
Not on vehicles with combustion engines
The safety sensor is not suitable for use on vehicles with combustion engines, because alternators
or ignition systems can cause EMC disturbances.
ªOnly use the safety sensor on vehicles without a combustion engine.
No changes on the safety sensor
The construction of the safety sensor may not be changed, because the protective function can no longer
be guaranteed if the safety sensor is changed. Manipulating the safety sensor also voids all warranty
claims against the manufacturer of the safety sensor.
Service life TMaccording to ISO 13849-1: 2006
Values PL and PFHdof the safety sensor refer to a service life TMof 20 years.
Repairs or the exchange of parts subject to wear and tear do not extend the service life.
Protective function limits
The safety sensor does not protect against:
• Projected (thrown out) parts
• Splashing/spraying liquids
• Gases and vapors
• Radiation
2.7 Guarantee the availability of the safety sensor
Vapors, smoke, dust, particles
Vapors, smoke, dust and all particles visible in the air can cause the machine to switch off unintentionally.
This can mislead the user into bypassing the safety devices.
ªDo not use the safety sensor in environments in which heavy vapors, smoke, dust or other visible par-
ticles occur at the beam level.
No stray light
Light sources can impair availability. Interfering light sources are:
• Infrared light
• Fluorescent light
• Strobe light
ªEnsure that there are no interfering light sources at beam level.
ªPrevent reflective surfaces at beam level.
ªWhere applicable, take additional protective field distances into account.
ªImplement all additional measures to ensure that any special use of any effected beam types does not
impair the safety sensor's operation.
No obstructions in the protective field
ªDo not bring any additional window materials into the area monitored by the safety sensor.
2.8 Providing the company operating the machine with information
The machine manufacturer must inform the company operating the machine in detail and comprehensibly
about all activities that are required for the safety-assured operation of the machine with the safety sensor.
This also includes the forwarding of information from these instructions that the operating company
requires.
The type and content of the information may not, however, result in any questionable safety-related actions
by the user.
Where required, safety key, special tools and passwords should be maintained under the control of one or
more responsible or authorized people.
Safety
Leuze electronic RS4 10
2.9 Exemption of liability
Leuze electronic GmbH + Co. KG is not liable in the following cases:
• safety sensor is not used as intended
• safety notices are not adhered to
• reasonably foreseeable misuse is not taken into account
• mounting and electrical connection are not properly performed
• proper function is not tested, see chapter 11 „Testing“
• changes (e.g., constructional, electrical) are made to the safety sensor.
Device description
Leuze electronic RS4 11
3 Device description
The ROTOSCAN RS4 safety sensor is an optical, two-dimensional measuring Safety Laser Scanner.
The safety sensor transmits periodic light pulses via a rotating deflection unit. The light pulses are reflected
by obstructions, e.g. people, and received by the safety sensor again and analyzed. The safety sensor
calculates the precise position of the obstruction from the light travel time and the angle of the deflection
unit at that time. If the obstruction is within a predefined area, the protective field, the safety sensor
performs a safety-related switching function. It switches the safety-related switching outputs off.
Only when the protective field is free again does the safety sensor reset the safety-related switching func-
tion, either automatically or following confirmation, depending on the operating mode.
The safety sensor can even detect people when they are wearing very dark clothes, which have a very
weak diffuse reflectance.
Figure 3.1: Safety sensor detection ranges
SF
WF
a
de
43
1
1
1 2
Pos. Description Comment
1 Configured warning field Example
2 Configured protective field Example
3 Object (person) in the protective field Example
4 Safety sensor
a Maximum measurement value logging 50 m
d Configurable protective and warning field extension -5°
e Configurable protective and warning field extension +5°
PF Maximum protective field
WF Maximum warning field
Device description
Leuze electronic RS4 12
3.1 Device overview
3.2 Display elements
Status display
Five LEDs on the front show the safety sensor's status
1 X1 interface for controlling the machine, with protective cap
2 X2 interfaces for PC/laptop, with protective cap
3 Status display
4 Scatter screens
5 Front screen
Figure 3.2: Safety sensor overview
2
2
2
4
4
5
5
3
3
1
1
Device description
Leuze electronic RS4 13
Figure 3.3: Status displays
3452
1
Device description
Leuze electronic RS4 14
Table 3.1: Meaning of the LEDs
3.3 Mounting system (option)
The mounting system makes it easier to install and align the safety sensor. The mounting system is avail-
able as an accessory (see chapter 17.1 „Accessories to choose from“).
3.4 ConfigPlug (option)
The ConfigPlug makes it easier to swap out the safety sensor. It saves the configuration when the PC is
configured and automatically transfers it with the device swap-out to the replacement device. The Config-
Plug is available as an accessory (see chapter 17.1 „Accessories to choose from“).
LED Meaning
1, green Lights Sensor function is active; the active protective field is free.
Flashes with 2 Hz Fault on the field pair control inputs.
Flashes with 4 Hz MotionMonitoring has detected a fault.
2, yellow Lights Active warning field is seized.
Flashes with 2 Hz Front screen is dirty.
Flashes with 4 Hz ConfigPlug configuration is not compatible with the safety
sensor.
3, red Lights Safety-related switching outputs (OSSD 1 and 2) are
switched off.
4, green Lights Safety-related switching outputs (OSSD 1 and 2) are
switched on.
5, yellow Lights Start/restart interlock locked.
Flashes with 2 Hz Front screen is dirty.
Flashes with 4 Hz Fault
ok.
STOP
ok.
Functions
Leuze electronic RS4 15
4 Functions
The functions of the safety sensor must be matched to the respective application and its safety require-
ments. You can activate, deactivate and adjust functions with parameters (list of all parameters of the
safety sensor see chapter 9 „Parameters“). You configure the functions with the help of the RS4soft config-
uration and diagnostics software.
4.1 Start/restart interlock
The start/restart interlock has two functions:
• Start interlock
• Restart interlock
Using start/restart interlock
ªIn addition to the safety sensor you must also install the start/restart button. The machine operator starts
the machine with this start/restart button.
ªPosition the start/restart buttonoutside thedangerzonesothatitcannotbeactivatedfromthe protective
fields and danger zones. The operator must be able to see all danger zones from this position.
ªIdentify the zone to be released on the start/restart button so that its meaning is clear and easy to under-
stand.
ªEnsure that nobody is in the danger zone before pressing the start/restart button.
4.1.1 Start interlock
The start interlock function prevents the machine from starting automatically after switching on or after the
power supply returns.
The machine only starts when you press the start/restart button.
4.1.2 Restart interlock
The restart interlock prevents the machine from starting automatically, as soon as the protective field is
free again. The restart interlock function always includes the start interlock function.
The machine only starts again when you press the start/restart button.
4.2 Start test
The start test function compels the operator to interrupt the protective field once after the safety sensor
start, e.g. with a test rod. Only then can the machine be started.
Using the start test
If you combine the start test with the automatic restart function, the start test serves as an automatic start/
restart signal.
4.3 Automatic start/restart
The machine starts automatically as soon as the machine is switched on or the supply voltage returns and
when the protective field is free again.
Using automatic start/restart
You can use the automatic start/restart function under the following conditions.
• The automatic start/restart function is taken over by a downstream safety-related component of the
machine control system.
or
• It is not possible to walk behind or go around the effective protective field.
ªAllow for an optical and/or acoustic start warning.
4.3.1 Automatic start
The automatic start function starts the machine automatically as soon as the supply voltage is present.
Functions
Leuze electronic RS4 16
4.3.2 Automatic restart
The automatic restart function starts the machine automatically as soon as the protective field is free again.
4.4 Dust suppression
The dust suppression function increases the availability of the safety sensor when small particles are in
the air, e.g. material chips or insects.
Only deactivate the dust suppression function when, in addition to people, the safety sensor must also
detect extremely fast and small objects in your application.
If you use the safety sensor for the mobile danger zone guarding of DTSs, you must select the speed range
of your vehicle to optimize dust suppression.
4.5 Field pair switchover
The safety sensor has four or eight field pairs. Switchover between the field pairs is possible at all times,
provided the operating situation allows this.
During the switchover process the safety sensor monitors the field pair activated before the changeover
until a new one has been clearly activated. Use the field pair switchover when the danger zones vary
depending on the activity of the machine or the operating status, e.g. driverless transportation system
(DTSs), to control the protective field switchover for straight and curved stretches.
If the rules for field pair switchover are not complied with, the safety sensor signals a fault and the machine
stops.
Using field pair switchover
You can configure and switch over the field pairs according to the different requirements. The switchover
is performed via the corresponding control inputs on the X1 interface.
The precepts for the switchover depend on the amount of the selected field pairs and their numbers. The
activated field pair must correspond with the respective operating mode. The time of the switchover must
correspond with the machine's risk assessment. You must take the braking distances, response times and
machine stopping times, e.g. influenced by overlapping protective fields, into account.
If these rules are not complied with, the safety sensor goes to a fault status within 40 ms. The green LED
1 flashes with 2 Hz.
The following rules apply for switching over four field pairs:
• First the control unit must switch to a new field pair before it switches of the previous one.
• The switchover must be made within 1 sec. Both field pairs are monitored during the switchover
time.
• All field pairs must never be deactivated during the switchover.
• The switchover process performed by the control system must agree with the safety sensor's config-
uration. This configuration is specified with the configuration and diagnostics software.
Table 4.1: Connection of control inputs FP1 to FP4 with activation of field pairs 1 to 4.
The following rules apply for switching over eight field pairs:
• The switchover must be made within 40 ms, i.e. after 40 ms an input connection must be valid and
stable. The old field pair is monitored during the switchover time. The new field pair is monitored after
max. 80 ms.
• The switchover process performed by the control system must agree with the safety sensor's config-
uration. This configuration is specified with the configuration and diagnostics software.
Field pair Control input Description
FP1 FP2 FP3 FP4
1 1000Fieldpair1isactive
2 0100Fieldpair2isactive
3 0010Fieldpair3isactive
4 0001Fieldpair4isactive
Functions
Leuze electronic RS4 17
Table 4.2: Connection of control inputs FP1 to FP4 with activation of field pairs 1 to 8.
4.6 Reference boundary monitoring
The reference boundary monitoring function prevents unintentional misalignment and deliberate manipu-
lation of the safety sensor. If a protective field contains an area with reference boundary, the safety sensor
not only monitors interruptions of the protective field, it also monitors the concurrence of the measured
area contour with the set reference boundary. If the measurement values of the area contour deviate from
the defined reference boundary by more than the tolerance zone, i.e., if no object is detected in the area
with reference boundary, the safety sensor switches off and the safety-related switching outputs (OSSDs)
switch to off. The reference boundary function is set together with the definition of the protective field
boundaries.
4.7 MotionMonitoring
The MotionMonitoring function assists you during the configuration of the safety sensor for the mobile
danger zone guarding application for side-tracking skates and, during travel operation of the side-tracking
skate, monitors whether the control has selected the correct protective field for the given operating situa-
tion.
Using its internal measurement values, the safety sensor calculates the current speed of the side-tracking
skate and compares this value with the speed configured in the speed matrix of the safety sensor for the
protective field. This control function of MotionMonitoring leads to the following behavior:
• If the speed is higher than the speed given for the protective field, the safety sensor corrects by one
protective field upwards. If a second correction is required with an even faster speed, the safety sen-
sor stops the side-tracking skate.
• If the maximum speed is exceeded, the safety sensor stops the side-tracking skate immediately.
Two further functions are integrated into the MotionMonitoring function, which are assigned to the two field
pairs, 7 and 8:
• Further travel blocking – field pair 7
• Creep and reverse – field pair 8
Field pair Control input Description
FP1 FP2 FP3 FP4
1 1000Fieldpair1isactive
2 0100Fieldpair2isactive
3 0010Fieldpair3isactive
4 0001Fieldpair4isactive
5 1110Fieldpair5isactive
6 1101Fieldpair6isactive
7 1011Fieldpair7isactive
8 0111Fieldpair8isactive
WARNING
Field pair switchover to field pair 8 deactivates the monitoring function
No field pair is now monitored; the safety outputs (OSSDs) remain constantly active.
ªNever start the safety sensor with field pair 8.
ªOnly use field pair 8 when there is no danger for people present, e.g. with vehicles in creep and
reverse, in the area of loading or park positions or during machine cycles with which there is no danger
for the operating staff.
Functions
Leuze electronic RS4 18
Further travel blocking
The further travel blocking function prevents the side-tracking skated from moving as long as field pair 7
is active. The safety sensor switches the safety-related switching outputs in field pair 7 off. The side-
tracking skate can start to move again when the control switches to another protective field.
Creep and reverse
A safety sensor is mounted in both directions when a side-tracking skate travels forwards and backwards.
The creep and reverse function deactivates the safety sensor that is positioned opposing the current travel
direction. This safety sensor only monitors the speed and direction of movement: no protective field and
no warning field is monitored; the safety-related switching outputs remain set to ON. The maximum speed
with a creep speed is 100 mm/s. If the side-tracking skate moves faster than 100 mm/s, the safety sensor
switches the safety-related switching outputs off and stops the side-tracking skate. The creep function is
used as the side-tracking skate approaches the minimum distance to loading and unloading stations.
Using MotionMonitoring
Requirements for using the MotionMonitoring function:
• Side-tracking skate (AGV) with linear movement
• Transportation path length max. 50 m
• Transportation path restricted at both ends by a wall or boundary
Pedestrian traffic on the transportation path is possible because it is included in the calculations by
the safety sensor
• Side-tracking skate speed 6 m/s
• Only one side-tracking skate per path
ªEnter the speed levels of the AGV and the braking distance with maximum speed in the speed matrix
with the configuration.
The software interpolates the missing braking distances and automatically defines the protective and
warning fields.
During the initial start up, the configuration and diagnostic software displays the calculated measurement
values for speed and distance and a speed monitoring status display in a separate dialog field.
Notices on starting up a safety sensor with the MotionMonitoring function (see chapter 10 „Setting the
device into service“).
Function sequence
The protective field activated by the vehicle control— specified by protective field contour and travel
speed— is monitored by the safety sensor for protective field violation and excess travel speed!
The following steps describe the principle operating procedure of the MotionMonitoring function:
• Via 4 standard outputs, the vehicle control activates the protective field that is adapted to the operat-
ing system on the control inputs of the safety sensor:
• small protective field for slow travel
• medium protective field for moderate travel
• large protective field for fast travel
• PF8 for reverse travel
• The safety sensor monitors this protective field and switches off in the event of a violation.
• While the protective field is free, the safety sensor ascertains the current travel speed and travel
direction.
• The travel speed and travel direction are compared with the values configured in the speed matrix.
• If in agreement, i.e., the measured speed is smaller than the configured value, the system functions
correctly and the safety sensor activates alarm output 2.
• If the measured speed is greater than the configured value, the safety sensor assumes that a fault
has occurred in the system and deactivates alarm output 2.
Faults lead to two escalation levels:
• The protective field is corrected for a short time (5 s) while the next larger is automatically moni-
tored by the safety sensor.
• If the speed increases further or if the maximum speed is exceeded, the safety sensor switches off
the safety-related switching outputs; an entry appears in the diagnostics list.
Applications
Leuze electronic RS4 19
5 Applications
The following chapters essentially describe the safety sensor's usage possibilities. To safely configure and
mount the safety sensor for the respective application (see chapter 6 „Mounting“).
5.1 Stationary danger zone guarding
Stationary danger zone guarding enables a very spacious protection of people on machines that are to
remain as accessible as much as possible. The safety sensor is applied as a stop-activating and presence-
detecting protective device. The safety sensor's protective field is set up horizontally in front of the machine
or system's point of operation.
You can also use the stationary danger zone guarding if you do have to guard areas under the machine
or at the rear that are not visible.
1 EMERGENCY STOP command device and start/restart button
2 Safety sensor
3 Protective field 2, activated
4 Protective field 1, deactivated
5 Warning field 2, activated
6 Warning field 1, deactivated
Figure 5.1: Stationary danger zone guarding with two alternating work areas
3
3
4
4
121
3
5
3
6
Applications
Leuze electronic RS4 20
5.2 Stationary point of operation guarding
Hand and arm protection are always required when people must work at the point of operation. The safety
sensor is applied as a stop-activating and presence-detecting protective device. The safety sensor's
protective field is set up vertically in front of the machine or system's point of operation. With small protec-
tive field dimensions the safety sensor provides the correspondingly required high resolution level. A suffi-
cient safety distance to the point of operation ensures the finger protection.
1 Safety sensor
2 Reference boundaries of both protective fields
3 EMERGENCY STOP command device and start/restart button
4 Protective field 1, activated
5 Protective field 2, deactivated
Figure 5.2: Stationary point of operation guarding with protective field switchover
3
3
4
4
5
3
2
3
3
1
Applications
Leuze electronic RS4 21
5.3 Stationary access guarding
Stationary access guarding protects people that step into a danger zone. The vertically aligned protective
field of the safety sensor detects the passage of a person. A side post and the floor serve as reference
boundary for monitoring the position of the protective field. In contrast to danger zone guarding, the safety
sensor no longer registers a person in the danger zone after the passage. This is why the start/restart inter-
lock function is vital for access guarding.
1 Safety sensor
2 Reference boundary of the protective field
3 EMERGENCY STOP command device and start/restart button
4 Protective field
Figure 5.3: Stationary access guarding
4
4
3
2
3
3
1
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