Chapter 5 System Operation
82
890 USE 120 00
Powering Up and Powering Down the System, continued
Emergency Stop
strategies
The Emergency Stop function is defined in EN 60204 (VDE 0113), Para. 9.2.5.4.
Implementation of the Emergency Stop function:
l Category 0:
The controller is switched to "disable", the electrical supply (400VAC) is
disconnected.
The motor must be held by an electromagnetic holding device (brake).
In single axis or multiaxis systems with connected DC-link bus (intermediate circuit)
the motor leads have to be disconnected by a changeover switch and short-
circuited by resistors connected in a star configuration.
l Category 1:
If hazardous conditions can result from an emergency stop switch-off with an
unbraked run-down, then the drive can be switched off by a controlled shut-down.
Stop Category 1 permits electromotive braking with a switch-off when zero speed
has been reached. Safe shut-down can be achieved, when the loss of the mains
supply is not rated as a fault and the control takes over the disabling of the servo
amplifier.
In the normal situation, only the supply power is switched off in a safe manner.
The 24V auxiliary supply remains switched on.
Continued on next page
To Next Page
Loading...