34
2-5
Corrective Function
2-5-1
Adjustment of Frequency Setting Value, Output Frequency Bias
(No. 23) and Gain (No. 22)
Any desired value of output frequency for frequency set value (0 to
10 V or 4 to 20 mA) can be set.
Example
Adjust so as to obtain 10% speed (6 Hz) at frequency setting volt-
age 0 V and 100% speed (60 Hz) at 8 V.
Description
Key Operation
Digital Operator Display
Select PRGM Mode.
(Bias)
Select constant (No. 23).
Data (No. 23) are displayed.
Change the set value.
PRGM
ENTER
DATA
ENTER
RESET
DATA
ENTER
BIAS
(No. 23)
100
123
10
8 V
10 V
0
REF.
Input
level
(%)
(No. 22)
Gain
Gain
FREQ. setting voltage (V)
(10 % = 0.1)
Description
Key Operation
Digital Operator Display
(Gain)
Select constant (No. 22).
Data (No. 22) are displayed.
Change the set value.
DATA
ENTER
RESET
DATA
ENTER
NO
DSPL
(See note.)
Note
1. The gain can be calculated using the following equations:
x =
. . . (1)
a
100 - b
G =
. . . (2)
100
10x + b
a
: Setting voltage at 100% frequency
b
: Bias level (%)
G
: Gain set value
For example, if 100% speed (60 Hz) is obtained at 8 V, a=8. If
10% speed (6 Hz) is obtained at a frequency setting voltage of
0 V, b=10. In this case, the above equations yield G=1.23.
2. No. 22 and No. 23 can also be adjusted in DRIVE Mode.
Corrective Function
Section 2-5
