YASKAWA iQpump Series Programming Manual page 50

Function: Ext Baseblk N.O. (Setting: 8)
Function: Ext Baseblk N.C. (Setting: 9)
When the iQpump drive is commanded into baseblock, gating of the output transistor stops and output voltage/frequency drops to zero
(motor coasts). The iQpump 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
Figure 1.35
RUN Command
Speed Command
Output Frequency
50
Baseblock Input
Figure 35 External Baseblock Characteristics
Begin Speed Search
from stored Speed
Command
TIME
YASKAWA TM.iQp.02 iQpump Drive Programming Manual