SECTION EIGHT – Safety function RESTART INTERLOCK (Optional)
DS2000 USER’S MANUAL (rev.C)
8.13
8.9 CHECKING THE RESTART INTERLOCK
The following checks must always be made at the first start-up and when possible must be
repeated at certain intervals during the operating lifetime. A check should also be made after
longer production standstills. Each individuai drive must be checked.
The check must be made by qualified personnel taking into account the necessary safety
procedures:
• Check that the motor is at standstill
• Inhibit the IGBT drivers by withdrawing the voltage at position 2 (Channel 1) of RESTART
INTERLOCK connector. Furthermore, the acknowledge contacts 5-6 (Channel 1
verification) of RESTART INTERLOCK connector must be closed. The drive then does not
provide output current.
• If also “Channel 2” is used: inhibit the IGBT drivers by withdrawing the voltage at position
4 (Channel 2) of RESTART INTERLOCK connector. Furthermore, the acknowledge
contacts 7-8 (Channel 2 verification) of RESTART INTERLOCK connector must be
closed. The drive then does not provide output current.
• Put the drive in the starting condition, with only the SW channel active (Drive Enable
OFF). Send a reference signal to the motor velocity and verify that the motor does not
rotate.
• Disable the protective devices, e.g. by opening the protective doors while the motor is
running. If the stop is category 1 according to EN 60204-1:1997, check that the motor is
braked in a controlled stop and that the Restart Interlock function will be activated after the
stop. This must not result in a hazardous condition.
• AlI possible fault situations, which could occur, must be individually simulated in the signal
paths between the verification contacts and the external control as well as the signal
plausibility functions of this control, e.g. by disconnecting the Restart Interlock monitoring
circuit at positions 5-6 of RESTART INTERLOCK connector (condition 1) or by simulating
also the short circuit of the cable (condition 2) when this cannot be excluded.
For alI of the simulated fault situations, the line contactor must disconnect alI of the machine
or plant drives from the line supply.
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