Siemens Simovert Masterdrives Compendium page 858

08.2012
9.8.16 Safety information, hardware limit switches
DANGER
Siemens AG 6SE7087-6QX70 (Version AN)
SIMOVERT MASTERDRIVES
Before you start the positioning operation, please read the following
safety information:
♦ Please implement external control measures to ensure that the drive
is isolated from the power supply immediately, and, if necessary,
that the mechanical brake is engaged, in the event of hazardous
conditions (e.g. safety guard open, hardware limit switch crossed,
falling load hazard, etc.).
♦ Reduce the traversing velocity for the first commissioning steps by
setting the velocity override [819] to a lower value, e.g. 1...4 %. You
can monitor the current velocity override setting in display parameter
n540.11 [809.8]. Virtually all traversing operations of the technology
(except for home position reducing velocity and synchronization) are
affected by the override.
You can use a contactor on the input or output side to isolate the drive
from the power supply, or you can use option K80 "Safe STOP". Option
K80 contains a special positive-action relay with a checkback contact
which deactivates the actuation power for the power transistors
(IGBTs). This prevents the rotation of the motor, however the motor is
not electrically isolated from the power source. Option K80 is available
for all MASTERDRIVES MC units except for the Compact PLUS AC
units up to and including 4 kW and the Compact AC units. The "Safe
STOP" function has been certified by the Institute for Work Safety.
Compendium Motion Control
Technology Option F01
9-167