ABB ACS880 Series User manual

—
OPTIONS FOR ABB DRIVES
Safely-limited speed without the encoder
interface (option +Q966) for ACS880
multidrives
User's manual

Safely-limited speed without the
encoder interface (option +Q966) for
ACS880 multidrives
User's manual
Table of contents
1. Safety instructions
4. Electrical installation
7. Start-up and validation test
3AUA0000145935 Rev H
EN
Original instructions
EFFECTIVE: 2022-04-22

Table of contents
1 Safety instructions
7Contents of this chapter ...........................................................................
7Use of warnings and notes .......................................................................
8Instructions for functional safety circuits ........................................................
9Electrical safety precautions .....................................................................
2 Introduction to the manual
11Contents of this chapter ...........................................................................
11Applicability .........................................................................................
12Target audience ....................................................................................
12Exclusion of liability ................................................................................
12Quick reference guide for taking a safety function into use ..................................
12Related manuals ...................................................................................
13Terms and abbreviations ..........................................................................
3 Option description
15Contents of this chapter ...........................................................................
15Overview ............................................................................................
16Summary of wirings and settings ............................................................
17Operation principle .................................................................................
17SLS function .....................................................................................
17SLS with speed below the monitored speed ............................................
18SLS with speed above the monitored speed - time monitoring ......................
20SLS with speed above the monitored speed - ramp monitoring .....................
21SLS reaction when modulation is lost during deceleration ramp ....................
26SMS function ....................................................................................
27SSM function ....................................................................................
28Operation principle diagram ..................................................................
30Fault reaction function .............................................................................
30FSO module .....................................................................................
30Resetting the FSO module ................................................................
30Inverter unit STO function .....................................................................
4 Electrical installation
31Contents of this chapter ...........................................................................
31Wiring ................................................................................................
31SLS function .....................................................................................
32SMS function ....................................................................................
32SSM function ....................................................................................
5 Parameter settings
33Contents of this chapter ...........................................................................
33Competence ........................................................................................
Table of contents 5

33FSO module parameter settings .................................................................
34General parameters ............................................................................
35Parameters for the STO function .............................................................
36Parameters for the SSE function .............................................................
39Parameters for the SLS function .............................................................
43Parameters for the SMS function ............................................................
43Parameters for the SSM function ............................................................
44Inverter unit parameter settings ..................................................................
44Ramp parameters ..................................................................................
6 Use of the safety function
47Contents of this chapter ...........................................................................
47Activating and deactivating the SLS function ..................................................
47Activating and deactivating the SMS function .................................................
48Activating and deactivating the SSM function .................................................
7 Start-up and validation test
49Contents of this chapter ...........................................................................
49Validation of the safety functions ................................................................
49Competence .....................................................................................
49Validation procedure ...........................................................................
50Validation test reports ..........................................................................
50Start-up and validation test .......................................................................
8 Maintenance
55Contents of this chapter ...........................................................................
55Safety circuit maintenance .......................................................................
55Proof test interval ..................................................................................
56Functional safety components ...................................................................
56Competence ........................................................................................
56Residual risk ........................................................................................
56Intentional misuse ..................................................................................
57Decommissioning ..................................................................................
9 Technical data
59Contents of this chapter ...........................................................................
59Safety data ..........................................................................................
59Safety data values ..............................................................................
59Safety component types .......................................................................
59Safety block diagrams .........................................................................
59Relevant failure modes ........................................................................
60Fault exclusions ................................................................................
60Operation delays ...............................................................................
60Ambient conditions ................................................................................
60Related standards and directives ................................................................
61Compliance with the European Machinery Directive .........................................
61Compliance with the Supply of Machinery (Safety) Regulations (UK) .....................
Further information
6 Table of contents

Safety instructions
Contents of this chapter
This chapter contains the safety instructions which you must obey when you install, operate
and do maintenance on the safety functions of a drive.
Use of warnings and notes
Warnings tell you about conditions which can cause injury or death, or damage to the
equipment. They also tell you how to prevent the danger. Notes draw attention to a particular
condition or fact, or give information on a subject.
The manual uses these warning symbols:
WARNING!
Electricity warning tells about hazards from electricity which can cause injury or
death, or damage to the equipment.
WARNING!
General warning tells about conditions other than those caused by electricity, which
can cause injury or death, or damage to the equipment.
WARNING!
Electrostatic sensitive devices warning tells you about the risk of electrostatic
discharge which can cause damage to the equipment.
1
Safety instructions 7

Instructions for functional safety circuits
This manual does not contain the complete safety instructions of the drive. It only includes
the instructions related to the scope of this manual.
Only a qualified electrical professional who has sufficient knowledge about functional,
machine, and process safety is permitted to install, start up and maintain the safety circuit.
All user-made changes are on the user's responsibility.
WARNING!
The safety function described in this manual does not isolate the main or auxiliary
circuits from the power supply. Before you do work on the drive, or its main or
auxiliary circuits, do the steps in section Electrical safety precautions (page 9).
WARNING!
(With permanent magnet or synchronous reluctance [SynRM] motors only)
In case of a multiple IGBT power semiconductor failure, the drive system can produce
an alignment torque which maximally rotates the motor shaft by 180/p(with
permanent magnet motors) or 180/2p(with synchronous reluctance [SynRM] motors)
degrees regardless of the activation of the Safe torque off function. pdenotes the
number of pole pairs.
WARNING!
Do the validation test of the safety function at the start-up and also after you make
changes to the safety circuit.
WARNING!
Make sure that the functional safety of the machine is maintained in situations where
the safety option does not provide protection, for example, during commissioning,
system maintenance, fault tracing, or decommissioning.
WARNING!
Obey the safety instructions of the drive. If you ignore them, injury or death,
or damage to the equipment can occur. If you are not a qualified electrical
professional, do not do installation, commissioning or maintenance work.
8 Safety instructions
3

Electrical safety precautions
These electrical safety precautions are for all personnel who do work on the drive, motor
cable or motor.
WARNING!
Obey these instructions. If you ignore them, injury or death, or damage to the
equipment can occur.
If you are not a qualified electrical professional, do not do installation or maintenance
work.
Do these steps before you begin any installation or maintenance work.
1. Clearly identify the work location and equipment.
2. Disconnect all possible voltage sources. Make sure that re-connection is not possible.
Lock out and tag out.
• Open the main disconnecting device of the drive.
• Open the charging switch if present.
• Open the disconnector of the supply transformer. (The main disconnecting device
in the drive cabinet does not disconnect the voltage from the AC input power
busbars of the drive cabinet.)
• If the drive is equipped with a DC/DC converter unit (optional) or a DC feeder unit
(optional): Open the DC switch-disconnector ([Q11], option +F286 or +F290) of the
unit. Open the disconnecting device of the energy storage connected to the unit
(outside the drive cabinet).
• Open the auxiliary voltage switch-disconnector (if present), and all other possible
disconnecting devices that isolate the drive from dangerous voltage sources.
• In the liquid cooling unit (if present), open the switch-disconnector of the cooling
pumps.
• If you have a permanent magnet motor connected to the drive, disconnect the
motor from the drive with a safety switch or by other means.
• Disconnect all dangerous external voltages from the control circuits.
• After you disconnect power from the drive, always wait 5 minutes to let the
intermediate circuit capacitors discharge before you continue.
3. Protect any other energized parts in the work location against contact.
4. Take special precautions when close to bare conductors.
5. Measure that the installation is de-energized. Use a quality voltage tester. If the
measurement requires removal or disassembly of shrouding or other cabinet structures,
obey the local laws and regulations applicable to live working (including – but not limited
to – electric shock and arc protection).
•Before and after measuring the installation, verify the operation of the voltage tester
on a known voltage source.
• Make sure that the voltage between the drive input power terminals (L1, L2, L3)
and the grounding (PE) busbar is zero.
• Make sure that the voltage between the drive output terminals (T1/U, T2/V, T3/W)
and the grounding (PE) busbar is zero.
Safety instructions 9

Important! Repeat the measurement also with the DC voltage setting of the tester.
Measure between each phase and ground. There is a risk of dangerous DC voltage
charging due to leakage capacitances of the motor circuit. This voltage can remain
charged for a long time after the drive power-off. The measurement discharges the
voltage.
• Make sure that the voltage between the drive DC terminals (UDC+ and UDC-) and
the grounding (PE) terminal is zero. In cabinet-built drives, measure between the
drive DC busbars (+ and -) and the grounding (PE) busbar.
WARNING!
The busbars inside the cabinet of liquid-cooled drives are partially coated.
Measurements made through the coating are potentially unreliable, so only
measure at uncoated portions. Note that the coating does not constitute a safe
or touch-proof insulation.
6. Install temporary grounding as required by the local regulations.
7. Ask for a permit to work from the person in control of the electrical installation work.
10 Safety instructions
3

Introduction to the manual
Contents of this chapter
This chapter describes the manual in short and gives some general information for the
reader. This chapter also contains a quick reference guide for implementing a safety system.
Applicability
This manual is applicable to ACS880 air-cooled and liquid-cooled multidrives which have
the option +Q966: Safely-limited speed (SLS) without encoder, with FSO-12 (option +Q973)
or FSO-21 (option +Q972).
Required versions when using the FSO-12 module with option +Q966:
• ACS880 primary control program: 1.80 or later
• FSO-12 safety functions module: revision C or later
• Drive Composer pro: 1.6 or later.
Required versions when using the FSO-21 module with option +Q966:
• ACS880 primary control program: 2.2 or later
• FSO-21 safety functions module: revision D or later
• Drive Composer pro: 1.7 or later.
The FSO-21 module safety functionality described in this manual is valid for revision H. For
earlier FSO module revisions, not all functionality related to the SLS function is supported.
This manual shows the default design of the safety circuit ordered with option code +Q966.
The actual design can be different from the default design because of customer-defined
modifications. Always refer to the documentation delivered with the drive.
2
Introduction to the manual 11

Target audience
This manual is intended for people who install, commission, use and service the safety
function. Read the manual before working on the unit. You are expected to know the
fundamentals of electricity, wiring, electrical components, electrical schematic symbols, and
functional safety.
Exclusion of liability
ABB is not responsible for the implementation, verification and validation of the overall safety
system. It is the responsibility of the system integrator (or other party) who is responsible
for the overall system and system safety.
The system integrator (or other responsible party) must make sure that the entire
implementation complies with the instructions in this manual, all relevant standards, directives
and local electrical code, and that the system is tested, verified and validated correctly.
Quick reference guide for taking a safety function into use
Task
Connect the user-defined wiring (if any). Refer to the wiring instructions in this manual and the circuit
diagrams delivered with the drive.
Check and/or set the safety function related parameters (as listed in this manual).
Do the validation test to make sure that the implemented system meets the safety requirements. You
can find the instructions for the validation test in this manual and in the FSO module user's manual.
Document the validation test procedure. You can find the guidelines for the validation test report in this
manual and in the FSO module user's manual.
Related manuals
CodeManual
Drive hardware
3AUA0000101764ACS880 multidrive cabinets mechanical installation instructions
3AXD50000048635ACS880 liquid-cooled multidrive cabinets mechanical installation instructions
3AUA0000102324ACS880 multidrive cabinets and modules electrical planning instructions
3AXD50000048634ACS880 liquid-cooled multidrive cabinets and modules electrical planning
Supply units
3AUA0000130644ACS880-207 IGBT supply units hardware manual
3AXD50000174782ACS880-207LC IGBT supply units hardware manual
3AUA0000102453ACS880-307…+A003 diode supply units hardware manual
3AXD50000011408ACS880-307…+A018 diode supply units hardware manual
3AXD50000579662ACS880-307LC…+A018 diode supply units hardware manual
3AXD50000020546ACS880-907 regenerative rectifier units hardware manual
Inverter hardware
3AUA0000102519ACS880-107 inverter units hardware manual
3AXD50000196111ACS880-107LC inverter units hardware manual
Drive firmware
3AUA0000085967ACS880 primary control program firmware manual
12 Introduction to the manual

CodeManual
3AUA0000098062ACS880 primary control program quick start-up guide
3AUA0000103295ACS880 diode supply control program firmware manual
3AUA0000131562ACS880 IGBT supply control program firmware manual
3AXD50000020827ACS880 regenerative rectifier control program firmware manual
PC tools
3AUA0000094606Drive Composer start-up and maintenance PC tool user's manual
3AXD10000102417Functional safety design tool user’s manual
Safety
3AUA0000102301ACS880 multidrive cabinets and modules safety instructions
3AXD50000048633ACS880 liquid-cooled multidrive cabinets and modules safety instructions
3AUA0000048753Functional safety; Technical guide No. 10
www.abb.com/safetyABB Safety information and solutions
Options
3AUA0000085685ACX-AP-x assistant control panels user’s manual
3AXD50000015612FSO-12 safety functions module user’s manual
3AXD50000015614FSO-21 safety functions module user’s manual
Other documents
Delivered with the driveCircuit diagrams
Delivered with the drivePart lists
Safety data report (if ordered with option code +P947)
You can find manuals and other product documents in PDF format on the Internet at
www.abb.com/drives/documents.
Terms and abbreviations
DescriptionTerm
Classification of the safety-related parts of a control system in respect of their resistance
to faults and their subsequent behavior in the fault condition, and which is achieved
by the structural arrangement of the parts, fault detection and/or by their reliability.
The categories are: B, 1, 2, 3 and 4. (EN ISO 13849-1)
Cat.
Safety functions module which supports the FSE-31 module and the use of safety
encoders
FSO-21
Safety functions module which does not support the use of encodersFSO-12
Hardware fault tolerance (IEC 61508)HFT
Insulated gate bipolar transistorIGBT
Inverter module(s) under control of one control unit, and related components. One
inverter unit typically controls one motor.
Inverter unit
The period of time covering the intended use of the safety function/device. After the
mission time elapses, the safety device must be replaced. Note that any mission time
values given cannot be regarded as a guarantee or warranty. (EN ISO 13849-1)
Mission time
No modulationmodoff
Performance level. Levels a...e correspond to SIL (EN ISO 13849-1)PL
Programmable logic controllerPLC
Prevention of unexpected start-upPOUS
Worst case elapsed time following an actuation of a safety sensor connected to a
fieldbus before the corresponding safe state of its safety actuator(s) is achieved in
the presence of errors or failures in the safety function channel.
Safety function re-
sponse time
Introduction to the manual 13

DescriptionTerm
Safe acceleration rangeSAR
Safe brake controlSBC
Safety integrity level (1…3) (IEC 61508, IEC 62061, IEC 61800-5-2)SIL
Safely-limited speedSLS
The speed limit at which SLS monitoring is started, located in the middle of SLS trip
limit and SLS limit.
SLS monitoring limit
Safe maximum speedSMS
Safe stop 1 (IEC/EN 61800-5-2)SS1
Safe stop emergencySSE
Safe speed monitorSSM
Safe torque off (IEC/EN 61800-5-2)STO
Supply module(s) under control of one control unit, and related components.Supply unit
Confirmation by, for example, analysis that the safety system meets the functional
safety requirements of the specific application.
Validation
Confirmation by, for example, testing that the safety system meets the requirements
set by the specification.
Verification
For safety functions, the zero speed limit indicates the completion of the safe stopping
function.
Zero speed
14 Introduction to the manual

Option description
Contents of this chapter
This chapter describes the operation of the option +Q966, Safely-limited speed without the
encoder interface, and its settings.
Overview
Option +Q966 uses the FSO-12 safety functions module (option +Q973) or FSO-21 safety
functions module (option +Q972). ABB installs the FSO modules to the inverter units and
sets the delivery configuration for the option at the factory.
With option +Q966, these safety functions are configured in the FSO modules at the factory:
• Safely-limited speed (SLS). This function prevents the motor speed from exceeding the
user-defined speed limits.
• Safe maximum speed (SMS). This function prevents the machine from exceeding the
user-defined maximum speed of the machine or process.
• Safe speed monitor (SSM). This function provides a safe output signal to indicate when
the motor speed is between user-defined limits.
The user defines the operation of the safety functions with the FSO module parameters at
the start-up, for example, by setting the speed limits.
Note: If the Safe brake control (SBC) function is used, it is also activated according to the
configuration (either before or after the drive STO function is activated, or at a specified
speed limit). In this case, make sure that you have dimensioned the brake correctly for these
situations. For more information, refer to the FSO module user’s manual.
Note: A safety function request to the FSO module must be active for a minimum of 20 ms.
For more information on the safety functions of the FSO module, refer to FSO-12 safety
functions module user’s manual (3AXD50000015612 [English]) or FSO-21 safety functions
module user’s manual (3AXD50000015614 [English]).
3
Option description 15

The SLS and SSM functions comply with IEC/EN 61800-5-2. The SMS function is a special
implementation of the SLS function. For a complete list of related standards and European
directives, refer to section Related standards and directives (page 60).
￭Summary of wirings and settings
General information:
•The inverter units are equipped with the FSO-21 safety functions module (option +Q972)
or FSO-12 safety functions module (option +Q973). ABB installs the modules at the
factory.
The wirings and settings of the SLS function are:
• The user connects the SLS activation signal (for example, a switch) to the FSO module.
• The user connects the SLS indication signal (for example, an indication lamp or a gate
opening signal) to the FSO module.
• The digital input of the FSO module to which the SLS activation signal is connected, is
selected as the input for the SLS request. ABB sets the safety IO settings for SLS input
and output at the factory to agree with the circuit diagrams.
• The digital output of the FSO module to which the SLS indication signal is connected,
is selected as the SLS output. ABB sets the safety IO settings for SLS input and output
at the factory to agree with the circuit diagrams.
• The speed limits must be set according to the application requirements.
• The SLS function is set to use either the time monitoring or ramp monitoring method
to monitor the deceleration of the motors to the SLS speed limit.
•The deceleration time and limits for the deceleration ramp activated by the SLS function
are set according to the application requirements.
The wirings and settings of the SMS function are:
• There are two different versions of the SMS function. Version 1 monitors the motor
speed and trips the drive if the user-defined trip limit is exceeded. Version 2 of the SMS
function is similar to the SLS function except that it can only be configured to be
continuously on or off. ABB activates the SMS function (Version 1) at the factory.
• The SMS positive and negative speed limits are FSO module parameters that the user
must set at the start-up.
The wirings and settings of the SSM function are:
• ABB configures the SSM function at the factory to be permanently active. The user can
change this setting with FSO module parameters.
• The user connects the SSM indication signal (for example, an indication lamp) to the
FSO module.
•ABB sets the safety IO settings for the SSM output at the factory to agree with the circuit
diagrams.
• The SSM positive and negative speed limits are FSO module parameters that the user
must set at the start-up.
16 Option description

Operation principle
￭SLS function
The Safely-limited speed (SLS) function limits the motor speed so that it does not exceed
the user-defined speed limits when the function is active. The user defines the SLS limits
and trip limits. When the user activates the SLS function, the FSO modules send a SLS
request to the inverter units . The inverter units take the SLS parameters into use and control
the motor speed accordingly until the user deactivates the SLS request.
If the motor speed is above the user-defined SLS trip limit when the SLS function is activated,
the drive first decelerates the motor speed to the SLS limit. The FSO module monitors the
deceleration to the required speed with the time or ramp monitoring method.
Note: It is a good practice to define the motor speed reference so that it stays between the
SLS limits in the operating situations when the SLS function is active.
If the motor speed reaches the user-defined SLS trip limit, the FSO module activates the
Safe stop emergency (SSE) function. Depending on parameter settings, the SSE function
activates the inverter unit Safe torque off (STO) immediately, or after a deceleration ramp.
The motor coasts to a stop, or decelerates to zero speed.
There are four separate SLS functions in the FSO module with different parameter settings.
In the examples below, and in the delivered default settings of the +Q966 option, the SLS1
function is used.
For more information, refer to chapter Parameter settings and the FSO module user's
manual.
SLS with speed below the monitored speed
This time scheme diagram illustrates the operation of the SLS function. The motor speed
is below the monitored speed when the user activates the SLS function.
1 2 3
SLS request
SLS status &
indication
A
B
C
Motor speed
Time
2b
D
STO.14
3b
Safety function response timeA
SLS1 limit positive (parameter 200.23)
B
SLS1 trip limit positive (parameter SLSx.14)
C
Time to zero speed: Time from the STO activation to the moment when the acknowledgment be-
comes allowed (parameter STO.14). You must set this to the estimated time in which the motor
coasts to a stop from the maximum speed. Relevant only if 2b occurs.
D
Option description 17

1. The user or a PLC de-energizes the applicable digital inputs of the FSO module. This
activates the SLS request.
2. After the safety function response time (A), the FSO module starts to monitor the motor
speed. The FSO module energizes the digital output that indicates the SLS status.
While the monitoring is active, the inverter unit limits the motor speed so that it stays
at or below the SLS1 limit positive. The FSO module monitors the actual motor speed.
(2b) If the motor speed goes above the SLS1 trip limit positive (C), the FSO module
activates the SSE function, starts a counter for time (D) and the motor coasts to a stop
(in this case, the SSE function is configured as Immediate STO, refer to section
Parameters for the SSE function (page 36)).
3. The user or a PLC energizes the applicable digital inputs of the FSO module. This
deactivates the SLS request. The FSO module acknowledges the SLS1 function
automatically. This is set by an FSO parameter (SLSx.02), and no external
acknowledgement input is used. The FSO module stops SLS monitoring and
de-energizes the SLS indication signal.
(3b) Time (D) has elapsed. If the FSO module activated the SSE function at 2b, the
FSO module activates the SLS indication and the STO acknowledgement becomes
allowed now. The user must reset the inverter unit if the STO indication parameter
(FSOGEN.62 or 31.22) is set so that a fault is generated.
SLS with speed above the monitored speed - time monitoring
This time scheme diagram illustrates the operation of the SLS function with time monitoring.
The motor speed is above the monitored speed when the SLS function is activated.
1 2 3 4
SLS request
SLS status &
indication
5
A
B
3b
C
D
Motor speed
Time
SLSx.04
Safety function response timeA
SLS time delay (parameter SLSx.04): When time B has elapsed from the start of the counter (step
1 below), the FSO module starts SLS monitoring (if not already started).
B
SLS1 limit positive (parameter 200.23)
C
SLS1 trip limit positive (parameter SLSx.14)
D
18 Option description

1. The user or a PLC de-energizes the applicable digital inputs of the FSO module. This
activates the SLS request. The FSO module starts a counter for time (B).
2. After the safety function response time (A), the inverter unit starts to decelerate the
motor according to the user-defined deceleration ramp. The FSO module starts SLS
monitoring and energizes the digital output that indicates the SLS status when the motor
speed is in the middle of the SLS1 trip limit and the SLS1 limit.
3. The actual motor speed reaches the SLS1 limit positive. The inverter unit limits the
motor speed reference so that the motor speed stays at or below the SLS1 limit positive.
The FSO module monitors the actual motor speed. If the motor speed goes above the
SLS1 trip limit positive (D), the FSO module activates the SSE function (refer to section
SLS with speed below the monitored speed (page 17)).
(3b) Time (B) has elapsed. The FSO module starts SLS monitoring (if not already
started).
Note: If the motor speed is not below the SLS monitoring limit after time B has elapsed,
the FSO module activates the SSE function. Depending on SSE function parameter
settings, the motor either coasts to a stop (“Immediate STO”) or ramps down to zero
speed (“Emergency ramp”). For more information, refer to section Parameters for the
SSE function (page 36) and the FSO module user’s manual.
4. The user or a PLC energizes the applicable digital inputs of the FSO module. This
deactivates the SLS request.
The FSO module acknowledges the SLS function automatically. This is set to be
automatic by an FSO parameter (SLSx.02), and no external acknowledgement input
is used. The FSO module stops SLS monitoring and de-energizes the digital output
that indicates the SLS status. The inverter unit returns to normal operation and starts
to follow its ordinary speed reference. The inverter unit accelerates the motor to the
desired speed along its acceleration ramp (inverter unit parameter).
5. Normal operation continues.
Option description 19

SLS with speed above the monitored speed - ramp monitoring
This time scheme diagram illustrates the operation of the SLS function with ramp monitoring.
The motor speed is above the monitored speed when the SLS function is activated.
1 2 3 4
SLS request
SLS status &
indication
5
A
B
C
D
STO.14
2b 3b
Motor speed
Time
Safety function response timeA
SLS1 limit positive (parameter 200.23)
B
SLS1 trip limit positive (parameter SLSx.14)
C
Time to zero speed: Time from the STO activation to the moment when the acknowledgment be-
comes allowed (parameter STO.14). You must set this to the estimated time in which the motor
coasts to a stop from the maximum speed. Relevant only if 2b occurs.
D
1. The user or a PLC de-energizes the applicable digital inputs of the FSO module. This
activates the SLS request.
2. After the safety function response time (A), the inverter unit starts to decelerate the
motor speed. The ramp is defined and monitored using the SAR1 parameters of the
FSO module. The FSO module monitors the actual deceleration rate of the motor against
the ramp monitoring settings. The FSO module starts SLS monitoring and energizes
the digital output that indicates the SLS status when the motor speed is in the middle
of the SLS1 trip limit and the SLS1 limit.
(2b) If the motor speed does not follow the ramp monitoring limits, the FSO module
activates the STO function and starts a counter for time (D). The motor coasts to a stop.
Note: In this case, the FSO activates the SLS indication when the motor speed goes
below the SLS1 limit positive (B).
3. The actual motor speed reaches the SLS1 limit positive. The inverter unit limits the
motor speed reference so that the motor speed stays below the SLS1 limit positive.
The FSO module monitors the actual motor speed. If the motor speed goes above the
SLS1 trip limit positive (C), the FSO module activates the SSE function (refer to section
SLS with speed below the monitored speed (page 17)).
(3b) Time (D) has elapsed. If the motor speed did not follow the ramp at 2b, the FSO
module activates the SLS indication and the STO acknowledgement is now permitted.
The user must reset the inverter unit if the STO indication parameter (FSOGEN.62 or
31.22) is set so that a fault is generated. See chapter Parameter settings.
20 Option description