LEXIUM MHDA1004, User Manual

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Overview of Usability Features, continued
Restart lock -AS-
(A00 drives only) The restart lock -AS- is exclusively intended to provide safety for personnel, by
preventing the restart of a system. To achieve this personnel safety, the wiring of
the safety circuits must meet the safety requirements of EN60204, EN292
and EN 954-1.
The -AS- restart lock must only be activated,
l
When the motor is no longer rotating
(setpoint = 0V, speed = 0rpm, enable = 0V).
Drives with a suspended load must have an additional safe mechanical
blocking (e.g. by a motor-holding brake).
l
When the monitoring contacts (KSO1/2 and Fault RA/RB for all servo
amplifiers are wired into the control signal loop (to recognize a cable break).
The -AS- restart lock may only be controlled by a PLC if the control of the internal
safety relay is arranged for redundant monitoring.
The -AS- restart lock must not be used if the drive is to be made inactive for the
following reasons
l
Cleaning, maintenance and repair operations
l
Long inoperative periods
In such cases, the entire system should be disconnected from the supply by
the personnel, and secured (main switch).
l
Emergency-stop situations.
In an emergency-stop situation, the main contactor is switched off (by the
emergency-stop button or the Fault RA/RB contact in the safety circuit).