INVT Goodrive350-19 Series Operation Manual page 54

Goodrive350-19 Series VFD for Crane
holding brake closing (T4), and delay after reverse holding brake closing (T8).
Note: If delay before reverse holding brake release (T5), delay after reverse holding brake
release (T6), delay before reverse holding brake closing (T7), and delay after reverse holding
brake closing (T8) are set to 0, the delay parameters for forwarding running are used.
Step 6 T1, T5, T3, and T7 are usually set to 0 (default value).

T2, T6, T4, and T8 are related to the mechanical holding brake action time. For electromagnetic
holding brake, the time is generally in the range of 0.200–0.400s; for hydraulic holding brake, the
time is generally in the range of 0.300–1.000s. The time needs to be adjusted according to the
actual situation.

In closed loop vector control mode, the holding brake release frequency is generally in the range
of 0.20–0.50Hz, and the brake closing frequency is 0.00Hz.

For open loop vector and space voltage vector control modes, see subsequent parameter
settings.
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Commissioning guidelines