Safe Stop Commissioning Test - Danfoss FC 300 Design Manual

FC 300 Design Guide
Illustration of the essential aspects of an installation to achieve a Stopping Category 0 (EN 60204-1) with safety Cat.
3 (EN 954-1).

Safe Stop Commissioning Test

After installation and before first operation, perform a commissioning test of an installation or application
making use of FC 300 Safe Stop.
Moreover, perform the test after each modification of the installation or application, which the FC 300
Safe Stop is part of.
The commissioning test:
1. Remove the 24 V DC voltage supply to terminal 37 by the interrupt device while the motor is
driven by the FC 302 (i.e. mains supply is not interrupted). The test step is passed if the motor
reacts with a coast and the mechanical brake (if connected) is activated.
2. Then send Reset signal (via Bus, Digital I/O, or [Reset] key). The test step is passed if the motor
remains in the Safe Stop state, and the mechanical brake (if connected) remains activated.
3. Then reapply 24 V DC to terminal 37. The test step is passed if the motor remains in the coasted
state, and the mechanical brake (if connected) remains activated.
4. Then send Reset signal (via Bus, Digital I/O, or [Reset] key). The test step is passed if the motor
gets operational again.
5. The commissioning test is passed if all four test steps are passed.
NB!
The Safe Stop function of FC 302 can be used for asynchronous and synchronous motors. It
may happen that two faults occur in the frequency converter's power semiconductor. When
using synchronous motors this may cause a residual rotation. The rotation can be calculated
to Angle=360/(Number of Poles). The application using synchronous motors must take this
into consideration and ensure that this is not a safety critical issue. This situation is not rele-
vant for asynchronous motors.
NB!
In order to use the Safe Stop functionality in conformance with the requirements of EN-954-1
Category 3, a number of conditions must be fulfilled by the installation of Safe Stop. Please
see section Safe Stop Installation for further information.
NB!
The frequency converter does not provide a safety-related protection against unintended or
malicious voltage supply to terminal 37 and subsequent reset. Provide this protection via the
interrupt device, at the application level, or organisational level.
For more information - see section Safe Stop Installation.
Introduction to FC 300
MG.33.B7.02 - VLT is a registered Danfoss trademark
47