LEXIUM MHDA1004, User Manual, Page: 102 / 204

Chapter 5 System Operation
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890 USE 120 00
Description of the restart lock -AS-, continued
Installation /
Commissioning Safety instructions
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Observe the prescribed use of the restart lock -AS-
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The monitoring contacts (KSO1/2) for each amplifier with an restart lock -AS-
must be looped into the control circuit. This is vital, so that a malfunction of the
internal safety relay or a cable break can be recognized.
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If the restart lock -AS- is automatically activated by a control system (KSI1/2),
then make sure that the output of the control is monitored for possible
malfunction. This can be used to prevent a faulty output from activating the
restart lock -AS- while the motor is running.
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Keep to the following functional sequence when the restart lock -AS- is
used:
1. Brake the drive in a controlled manner (speed setpoint = 0V)
2. When speed = 0 rpm, disable the servo amplifier (enable = 0V)
3. If there is a suspended load, apply an additional mechanical block to the
motor
4. Activate the restart lock -AS
Functional test
The functioning of the restart lock must be tested during commissioning, after every
alteration in the wiring of the system, or after exchanging one or more components
of the system.
1. Stop all drives, with setpoint 0V, disable drives, mechanically block any
suspended loads
2. Activate the restart lock -AS-.
3. Open protective screens (enclosure doors, etc) but do not enter
hazardous area
4. Pull off the X10 connector from an amplifier; the Mains contactor must
drop out
5. Reconnect X10. Switch on Mains contactor again.
6. Repeat steps 4 and 5 for each individual servo amplifier.
Continued on next page