Safe Stop - Danfoss FC 300 Operating Instructions Manual

Installation
For basic serial communication set-up, select the following
1. Protocol type in 8-30 Protocol.
2. Frequency converter address in 8-31 Address.
3. Baud rate in 8-32 Baud Rate.
2 2
•
Two communication protocols are internal to the
frequency converter. Follow motor manufacturer
wiring requirements.
•
Functions can be programmed remotely using
the protocol software and RS-485 connection or
in parameter group 8-** Communications and
Options
•
Selecting a specific communication protocol
changes various default parameter settings to
match that protocol's specifications along with
making additional protocol-specific parameters
available
•
Option cards which install into the frequency
converter are available to provide additional
communication protocols. See the option-card
documentation for installation and operation
instructions

2.5 Safe Stop

The frequency converter can perform the safety function
Safe Torque Off (STO, as defined by EN IEC 61800-5-2
Stop Category 0 (as defined in EN 60204-1
Danfoss has named this functionality Safe Stop. Before
integration and use of Safe Stop in an installation, perform
a thorough risk analysis to determine whether the Safe
Stop functionality and safety levels are appropriate and
sufficient. Safe Stop is designed and approved suitable for
the requirements of:
- Safety Category 3 according to EN ISO 13849-1
- Performance Level "d" according to EN ISO
13849-1:2008
- SIL 2 Capability according to IEC 61508 and EN
61800-5-2
- SILCL 2 according to EN 62061
1)
Refer to EN IEC 61800-5-2 for details of Safe torque off
(STO) function.
2)
Refer to EN IEC 60204-1 for details of stop category 0
and 1.
Activation and Termination of Safe Stop
The Safe Stop (STO) function is activated by removing the
voltage at Terminal 37 of the Safe Inverter. By connecting
the Safe Inverter to external safety devices providing a safe
delay, an installation for a safe Stop Category 1 can be
obtained. The Safe Stop function can be used for
20
VLT ®
Instructions
Danfoss FC
Modbus RTU
2
).
MG33AM02 - VLT
AutomationDrive Operating
asynchronous, synchronous, and permanent magnet
motors.
WARNING
After installation of Safe Stop (STO), a commissioning test
as specified in 2.5.2 Safe Stop Commissioning Test must be
performed. A passed commissioning test is mandatory
after first installation and after each change to the safety
installation.
Safe Stop Technical Data
The following values are associated to the different types
of safety levels:
Reaction time for T37
- Maximum reaction time: 20 ms
Reaction time = delay between de-energizing the STO
input and switching off the frequency converter output
bridge.
Data for EN ISO 13849-1
- Performance Level "d"
- MTTF
years
- DC (Diagnostic Coverage): 90%
- Category 3
- Lifetime 20 years
Data for EN IEC 62061, EN IEC 61508, EN IEC 61800-5-2
- SIL 2 Capability, SILCL 2
1 ) and
- PFH (Probability of Dangerous failure per
Hour)=1E-10/h
- SFF (Safe Failure Fraction) >99%
- HFT (Hardware Fault Tolerance)=0 (1001
architecture)
- Lifetime 20 years
Data for EN IEC 61508 low demand
- PFDavg for one year proof test: 1E-10
- PFDavg for three year proof test: 1E-10
- PFDavg for five year proof test: 1E-10
No maintenance of the STO functionality is needed.
Security measures have to be taken by the user e.g. instal-
lation in a closed cabinet that is only accessible for skilled
personnel.
SISTEMA Data
Functional safety data is available via a data library for use
with the SISTEMA calculation tool from the IFA (Institute
for Occupational Safety and Health of the German Social
Accident Insurance), and data for manual calculation. The
library is permanently completed and extended.
®
is a registered Danfoss trademark
(Mean Time To Dangerous Failure): 14000
d