Danfoss FC 300 Design Manual

Also see for FC 300: Operating instructions Instruction manual Design guide Design guide Design guide

Contents

Danfoss FC 300 Design Manual Manual pdf 47 page image

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 TestAfter installation and before first operation, perform a commissioning test of an installation or applicationmaking use of FC 300 Safe Stop.Moreover, perform the test after each modification of the installation or application, which the FC 300Safe 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 isdriven by the FC 302 (i.e. mains supply is not interrupted). The test step is passed if the motorreacts 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 motorremains 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 coastedstate, 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 motorgets 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. Itmay happen that two faults occur in the frequency converter's power semiconductor. Whenusing synchronous motors this may cause a residual rotation. The rotation can be calculatedto Angle=360/(Number of Poles). The application using synchronous motors must take thisinto 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-954-1Category 3, a number of conditions must be fulfilled by the installation of Safe Stop. Pleasesee section Safe Stop Installation for further information.NB!The frequency converter does not provide a safety-related protection against unintended ormalicious voltage supply to terminal 37 and subsequent reset. Provide this protection via theinterrupt device, at the application level, or organisational level.For more information - see section Safe Stop Installation.FC 300 Design GuideIntroduction to FC 300MG.33.B7.02 - VLT is a registered Danfoss trademark 47