9 Description of Functions and Schemes
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320
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Automatic test:
After braking force test conditions
①
test state. The steps are the same as steps 4, 5, 6, and 7 of the manual test.
Fault E66 cannot be reset upon power failure and can be automatically reset only
when a braking force test is redone and passes.
◆
Countdown function: After 12 h is exceeded, the system starts to judge
countdown function code is reset to 24 h. If no test has been performed, the
system proceeds to condition 2 (forced test).
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During the automatic test, no fault is prompted for hall calls and the keypad
prompts the E88 test state. Hall calls can be registered, but cannot obtain
a response. The system restores to normal and responds to registered
hall calls at the end of the test. Car calls are canceled. The door cannot be
opened or closed.
①
Test conditions
◆
Condition 1: Normal test on braking force: Under the condition of no car
and hall calls, testing is performed after the elevator energy saving time or 3
minutes.
◆
Condition 2: Forced test on braking force: The system makes a judgment
ahead of 10 minutes. When time set in F7-10 is smaller than or equal to 10
minutes, the elevator buzzes for 30s. Buzzing can be closed by setting F8-
19 Bit13. At the moment, registered hall calls are reserved, car calls are
canceled, and the door can be opened or closed. The system starts testing
after the door is closed.
9.12 Shorting PMSM Stator Scheme
1 Background
Shorting PMSM stator means shorting phases UVW of the PMSM, which produces
resistance to restrict movement of the elevator car. This prevents car slip during brake
failure and ensures safety.
2 Overview
An independent contactor for shorting PMSM stator is installed. On the coil circuit of
the RUN contactor, an NO contact of the shorting PMSM stator contactor is connected
in serial, to ensure that output short circuit does not occur when the parameter
setting is incorrect.
Scheme 1: for AC shorting
Scheme 2: for DC shorting
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