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2.14
Switch-on and switch-off behavior
The diagram below illustrates the correct functional sequence for switching the servo
amplifier on and off.
DC bus link
2.14.1
Stop function as per EN 60204 (VDE 0113)
If a fault occurs (ð p.72) then the output stage of the servo amplifier is switched off and
the BTB/RTO contact is opened. In addition, a global error signal can be generated at
one of the digital outputs (terminals X3/16 and X3/17) – see online help for the setup soft-
ware. These signals can be used by the higher-level control system to finish the current
PLC cycle or to shut down the drive (with additional brake or similar).
Devices with activated (holding-)"Brake" function use a special sequence for switching off
the output stage (ð p.22).
The "Stop" functions are defined in EN 60204 (VDE 0113), Paras. 9.2.2, 9.2.5.3.
There are three categories of stop functions:
Every machine must be equipped with a Category 0 stop function. Stop functions to Cate-
gories 1 and/or 2 must be provided if the safety of functional requirements of the machine
make them necessary.
You can find further information and implementation examples in the Application Note
"Stop and Emergency Stop Functions".
®
SERVOSTAR
300 Installation Manual
Category 0: Shutdown by an immediate switch-off of the energy supply to the
drive machinery (i.e an uncontrolled shutdown);
Category 1: A controlled shutdown, during which the supply of energy to the drive
machinery is maintained as long as shutdown is being carried out, and
only interrupted when standstill has been reached;
Category 2: A controlled shutdown, during which the supply of energy to the drive
machinery is maintained.
12/05
Technical description
25
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