Blocking Inverter Outputs (Baseblock Commands) - YASKAWA Varispeed G7 Series Instruction Manual

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Blocking Inverter Outputs (Baseblock Commands)

Set 8 or 9 (Baseblock command NO/NC) in one of the constants H1-01 to H1-10 (multi-function contact input
terminal S3 to S12 function selection) to perform baseblock commands using the terminal's ON/OFF opera-
tion, 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 H1-10)
Set-
ting
Value
8 External baseblock NO (NO contact: Baseblock at ON)
9 External baseblock NC (NC contact: Baseblock at OFF)
Time Chart
The time chart when using baseblock commands is shown below.
Forward operation/Stop
Baseblock command
Frequency reference
Output frequency
IMPORTANT
-78
6
Function
Fig 6.51 Baseblock Commands
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.
Input Cleared
Search from stored frequency reference
Hold
Control Methods
Open Open
V/f Loop Flux Loop
V/f with Vec- Vec- Vec-
PG tor tor tor
1 2
Yes Yes Yes Yes Yes
Yes Yes Yes Yes Yes