YASKAWA E7U Programming Manual page 56

Function: Ext Baseblk N.O.
Setting: 8
Function: Ext Baseblk N.C.
Setting: 9
When the Drive is commanded into baseblock, gating of the output transistor stops and output voltage/frequency drops to zero
(motor coasts). The Drive can be forced into a baseblock state by either closing a digital input configured for Ext Baseblk N.O.
(H1-0x= 8) or opening a digital input configured for Ext Baseblk N.C. (H1-0x= 9).
When the baseblock state is removed the speed search function is used to catch the coasting motor and ramp it back to the
commanded speed.
The method of speed search, Current Detection or Speed Estimation, that is utilized when the baseblock input is removed depends
on the setting of parameter b3-01:
If b3-01= "0: SpdsrchF Disable" or "1: SpdsrchF Enable"; Speed Estimation is used
If b3-01= "2: SpdsrchI Disable" or "3: SpdsrchF Enable"; Current Detection is used
RUN Command
Baseblock Input
Speed Command
Output Frequency
Fig. 33 External Baseblock Characteristics
Programming 50
Begin Speed Search
from stored Speed
Command
TIME