5
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Application Constants: b
The following settings are made with the application constants (B constants): Operation method selection, DC
injection braking, and speed searching.
Operation Mode Selections: b1
User constants for operation mode selection are shown in the following table.
Constant
Number
Name
Description
Setting
Range
Factory
Setting
Change
during
Operation
Control
Methods
MEMOBUS
Register
Open-
loop
Vector
Flux
Vector
Display
b1-01
Reference selection
Set the frequency reference
input method.
0: Digital Operator
1: Control circuit terminal
(analog input)
2: MEMOBUS communica-
tions
3: PLC
0 to 3
3
No
Q
Q
1A0H
Reference Source
b1-02
Operation method
selection
Set the Run Command input
method.
0: Digital Operator
1: Control circuit terminal
(sequence input)
2: MEMOBUS communica-
tions
3: PLC
0 to 3
3
No
Q
Q
1A1H
Run Source
b1-03
Stopping method
selection
Used to set the stopping
method used when a Stop Com-
mand is input.
0: Deceleration to stop
1: Coast to stop
0 or 1
1
No
Q
Q
1A2H
Stopping Method
b1-04
Prohibition of reverse
operation
0: Reverse enabled
1: Reverse disabled
0 or 1
1
No
A
A
1A3H
Reverse Oper
b1-05
Operation selection for
setting E1-09 or less
Used to set the method of
operation when the frequency
reference input is less than the
minimum output frequency
(E1-09).
0: Run at frequency reference
(E1-09 not effective).
1: STOP (Frequencies below
E1-09 in the coast to stop
state.)
2: Run at min. frequency.
(E1-09)
3: Run at zero-speed (Frequen-
cies below E1-09 are zero)
0 to 3
1*
No
No
A
1A4H
Zero-Speed Oper
b1-06
Read sequence input
twice
Used to set the responsiveness
of the control inputs (forward/
reverse and multi-function
inputs.)
0: One scan every 1 ms (Use
for fast responses.)
1: Two scans every 5 ms (Use
for possible malfunction
due to noise.)
0 or 1
1
No
A
A
1A5H
Cntl Input Scans
