Functional Proof Tests; Pfd And Pfh Definitions; Intended Use Of The Safety Option; Mct 10 Set-Up Software With Safe Plug-In - Danfoss VLT MCB 150 Operating Instructions Manual

Functions and System Overvi...
activating a second Safe Stop 1 function with a steeper
ramp. The lower graph shows the actual ramp function.

3.2.5 Functional Proof Tests

The functional safety standards require that functional
proof tests are performed on the equipment used in the
system. Proof tests are performed at user-defined intervals
and are dependent on PFD and PFH values.

3.2.6 PFD and PFH Definitions

Safety-related systems can be classified as operating in
either a Low Demand mode, or in a High Demand/
Continuous mode.
Low demand mode
The frequency of demands for operation made on a safety-
related system is no greater than once per year.
High Demand/Continuous mode
The frequency of demands for operation made on a safety-
related system is greater than once per year.
The SIL value for a low demand safety-related system is
directly related to order-of-magnitude ranges of its average
probability of failure on demand (PFD). The SIL value for a
High Demand/continuous mode safety-related system is
directly related to the probability of a dangerous failure
per hour (PFH).

3.2.7 Intended Use of the Safety Option

CAUTION
RISK OF PERSONAL INJURY AND EQUIPMENT
DAMAGE!
To avoid personal injury and equipment damage, only
use the safety option for its intended purpose.
The following is considered as improper use
•
any component, technical or electrical modifi-
cation to the frequency converter
•
use of the frequency converter outside the
allowed electrical and environmental conditions
specified in chapter 9 Technical Specifications
®
and in the VLT AutomationDrive FC 301/FC 302
Operating Instructions.
The safety option is designed for use in safety-related
applications. It meets the requirements for safety functions
in accordance with IEC 61800-5-2, regarding safe motion
monitoring.
MG34W302
Operating Instructions
3.2.8 MCT 10 Set-up Software with Safe
Plug-in
Use MCT 10 Set-up Software to configure the safety
functions supported in safety option.
•
•
The software
•
•
•
A PDF file and a commissioning report can be generated
for documentation of the project and all its settings.

3.3 Unit Features

The safety option has the following features
•
•
•
•
Danfoss A/S © Rev. 2014-02-11 All rights reserved.
Configuration of the safety functions is required
for safe motion sequences. In the event of an
error or fault, these functions shut down the
frequency converter's power element in a safe
and controlled way.
Setting of limit values, braking ramps for the
safety functions, monitoring of motion sequences.
runs in full with a license key. All functions are
available from MCT 10 Set-up Software version
3.18.
supports the configuration of applications with
up to max. 256 safety options per project
has a simple language setting for the user
interface.
2 Dual-pole, digital inputs to activate the safety
functions in accordance with EN IEC 61800-5-2
- Safe Torque Off (STO)
- Safe Stop 1 (SS1)
- Safely Limited Speed (SLS)
Reset function
- Digital input 2 can be used for resetting
the safety option after an error or after
deactivation of a safety function.
Status indicators
- Safe input status (LED 1 and LED 2)
- Safe output status (LED 4)
- LED 3 reserved for future use (always in
off state)
- By Fault or warning the LEDs indicate a
failure via flash pattern, see Table 8.2
Supply voltage
- Internally supplied by the frequency
converter.
-
24 V DC output for safety sensors and
encoder available.
3 3
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