Emergency Stop According En 60204; Calculation Of The Rotation Angle Triggered By The Jerk; Table 2: Calculation Of The Jerk - KEB COMBIVERT F6 Instructions For Use Manual

SAFETY FUNCTIONS

3.2.1 Emergency stop according EN 60204

By using suitable safety switchgear units, stop category 0 and 1 according to EN 60204 -1 can be
reached by the STO function in the system. Note chapter 6 for safety switchgear units.
Stop category 0
Stop category 1
Emergency stop to EN 60204 must be functional in all operating modes of the drive module. The
reset of emergency stop may not lead to an uncontrolled start of the drive.
Attention
Without mechanical brake the drive leads to coast; motor is free-wheeling. Additional protective de-
vices must be installed (e.g.locking systems) if damage to persons or property can occur.
Danger
Attention

3.2.1.1 Calculation of the rotation angle triggered by the jerk

Rotation angle of the jerk W
Table 2: Calculation of the jerk
The probability of the jerk is < 1.84 *10
This behaviour can occur either by a short circuit of the IGBTs or by interconnection (also short circuit)
of the control drivers. The error should be regarded as critical, if the drive remains in STO status.
18
„uncontrolled stop", i.e. stop by immediate removal of power to the
actuators.
„controlled stop", i.e. power to the actuators is retained to apply brak-
ing until the stop is achieved. The energy is switched off at standstill.
Restart only after confirmation
The drive restarts if function STO is no longer released. In order to com-
ply with EN 60204-1 , it must be ensured by external measures that the
drive restarts only after confirmation.
Ensure coast of the motor
If danger to persons occur after switching off the motor control by STO,
the entrance to hazard areas must remain closed until the drive stops.
Jerks in error case
In case of double malfunction it can lead to unwanted jerk, the rotation
angle is depending on the number of poles of the selected drive and the
gear ratio.
[°] = –––––––––––––––––––––––––––––––––
R
Pole-pair number p • gear reduction ratio g
1/h.
-15
180°