12.2 b: APPLICATION
522 SIEPYEUOQ2A01A AC Drive Q2A Technical Manual
Figure 12.14 Operate at Minimum Frequency
4 : Zero Speed
The drive performs Zero Speed Control when the frequency reference falls below the value set in E1-09.
The drive performs Zero Speed Control again for the time set in b2-04 when the Stop command is entered (or
when the Run command is switched OFF).
Figure 12.15 Operate at Zero Speed
■ b1-06 Double Scan DI Inputs Select
No.
(Hex.)
Name Description
Default
(Range)
b1-06
(0185)
Double Scan DI Inputs
Select
Sets the number of times that the drive reads the sequence input command to prevent problems
from electrical interference.
2
(1, 2)
1 : Single Scan
The drive reads the terminal status one time. The drive immediately reads all changes to the terminal status.
This setting lets the drive quickly respond to changes in the sequence, but electrical interference can cause
problems.
2 : Double Scan
The drive reads the terminal status two times. The drive reads all changes to the terminal status two times to make
sure that the reading is the same.
The drive responds more slowly than when it reads the sequence one time, but this setting prevents electrical
interference problems.
■ b1-07 LO/RE Run Selection
No.
(Hex.)
Name Description
Default
(Range)
b1-07
(0186)
LO/RE Run Selection
Sets drive response to an existing Run command when the drive receives a second Run command
from a different location.
1
(1, 2)
This parameter interlocks the drive to help prevent accidents that can occur if the motor starts to rotate because the
Run command source changed.
To switch the RUN command source, push on the keypad or set H1-xx = 11, 9 [MFDI Function Select =
LOC/REM Sel., Ext Ref 1/2] and turn the terminal ON/OFF.
1 : Cycle RUN
If a Run command is enabled when you switch between Run command sources, the drive will not operate the
motor.
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