6-80
Blocking Inverter Outputs (Baseblock Commands)
Set 8 or 9 (Baseblock command NO/NC) in one of the constants H1-01 to H1-06 (multi-function contact input
terminal S3 to S8 function selection) to perform baseblock commands using the terminal's ON/OFF operation,
and prohibit Inverter output using the baseblock commands. At this time, the motor will be coasting and “BB”
will blink on the Digital Operator.
Clear the baseblock command to restart the operating using speed search from frequency references from the
previous baseblock command input.
Multi-function Contact Inputs (H1-01 to H1-06)
Time Chart
The time chart when using baseblock commands is shown below.
Fig 6.49 Baseblock Commands
Set-
ting
Value
Function
Control Methods
V/f
V/f
with
PG
Open
Loop
Vec-
tor
Flux
Vec-
tor
8 External baseblock NO (NO contact: Baseblock at ON) Yes Yes Yes Yes
9 External baseblock NC (NC contact: Baseblock at OFF) Yes Yes Yes Yes
IMPORTANT
If using baseblock commands with a variable load, do not frequently input baseblock commands during oper-
ation, as this may cause the motor to suddenly start coasting, and may result in the motor falling or slipping.
Forward operation/Stop
Baseblock command
Frequency reference
?Output frequency
Input
Cleared
Search from stored frequency reference
Hold
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