Danaher Motion 601...620 Product Manual
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6.8.2 Emergency Stop: StandardsThe emergency Stop function is used for the fastest possible shut-down of the machine in a dan-gerous situation. The Emergency Stop function can be triggered by the actions of a single person. Itmust be fully functional and available at all times. The user must not have to work out how to oper-ate this mechanism.The Emergency Stop function is defined by EN 60204 (VDE 0113), paragraph 9.2.5.4.In addition to the requirements for Stop, the emergency Stop must fulfil the following requirements:l emergency stop must have priority over all other functions and controls in all operating situa-tions;l the energy supply to any drive machinery that could cause dangerous situations must be swit-ched off as fast as possible, without causing any further hazards (e.g. by using mechanical lat-ching devices that do not require an external supply of energy, by counter-current braking inStop Category 1);l the reset must not initiate a restart.If necessary, provision must be made for the additional connection of emergency stop devices (seeEN 60204, "Requirements for emergency stop devices").The Emergency Stop must be effective as a stop of either Category 0 or Category 1.The Emergency Stop Category must be determined by a risk evaluation of the machine.Category 0Only hard-wired, electromechanical components may be used for the Category 0 Emergency Stopfunction. It must not be triggered using switching logic (hardware or software), by transferring com-mands via a communication network, or via a data link.The drive must be shut down using an electromechanical circuit. If the connected servo motor hasan integrated brake, this must always be controlled by an electromechanical circuit as well.Category 1With the Category 1 Emergency Stop function, there must be absolute certainty in terms of thepower supply for the machine drives being switched off (i.e., secured) using electromechanical com-ponents. Additional Emergency Stop equipment may be connected. Bringing the motor to a stand-still by interrupting the mains supply and using controlled electronic braking. The 24 V supply for theservo amplifier must remain constant. The issue of which circuit should be used is highly dependenton the requirements of the application at hand.Usually a brake in a servo motor only has the function of a holding brake. To ensure an emergencystop function, the braking torque that is required must be checked. If the holding brake fulfills thedynamic requirements, it must be taken into acount that this application will cause increased wear.The parameters “STOPMODE” and “ACTFAULT” must be set to 1 in order toimplement the stop categories. If necessary, change the parameters via theterminal screen of the setup software and store the data in the EEPROM.28 SERVOSTAR ® 601...620 Product ManualTechnical description 07/2007 Danaher Motion |
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