Instruction manual

106
PARAMETERS
4.2.28 Voltage input (Pr. 73, Pr. 254)
Pr. 73 "0-5V/0-10V selection"
Pr. 254 "analog polarity reversible
lower limit"
• You can change the input (terminal 2) specifications in response to the frequency
setting voltage signal. When entering 0 to 10VDC, always make this setting.
Note:When setting "10" or "11" in Pr. 73 and any value in Pr. 254, set "801" in Pr. 77
 Polarity reversible operation
By changing the input voltage, you can switch between forward rotation and reverse rotation.
Set "801" in Pr. 77 and "10" or "11" in Pr. 73 to make this function valid.
1) Set the output frequency using Pr. 902 "frequency setting voltage bias" and Pr. 903
"frequency setting voltage gain".
Ex.) When setting 0Hz and 2.5V in Pr.902 and 60Hz and 5V in Pr. 903 to give a
forward rotation command
When Pr. 73 = "10" as factory-set, Pr. 902 = 2.5V. When Pr. 73 = "11", Pr. 902 = 5V.
Parameter
Number
Factory
Setting
Setting
Range
Remarks
73 0 0, 1, 10, 11 (Note)
254 9999
0 to 100%,
9999 (Note)
9999: Function invalid
Parameter
Number
Setting Terminal 2 Input Voltage
Polarity
Reversible
73
0 For 0 to 5VDC input (factory setting)
No
1 For 0 to 10VDC input
10 For 0 to 5VDC input
Val id
11 For 0 to 10VDC input
Note:1. To change the maximum output frequency at the input of the maximum
frequency command voltage, use Pr. 38. Also, the acceleration/deceleration
time, which is a slope up/down to the acceleration/deceleration reference
frequency, is not affected by the change in Pr. 73 setting.
2. When connecting a frequency setting potentiometer across terminals 10-2-5
for operation, always set "0" in this parameter.
Pr. 73 = "0" or "1" Pr. 73 = "10" or "11"
Pr. 38 "frequency at 5V (10V) input"
Pr. 902 "frequency setting voltage bias"
Pr. 903 "frequency setting voltage gain"
Related parameters
Output frequency[Hz]
Output frequency[Hz]
Input voltage
(Terminal 2)
[V]
5V
(10V)
0V
(0V)
Forward
rotation
0Hz
2.5V
(5V)
Use Pr. 73
Pr. 903
Pr. 902
Output frequency[Hz]
Output frequency[Hz]
Input voltage
(Terminal 2)
[V]
5V
(10V)
0V
Reverse
rotation
Forward
rotation
0Hz
2.5V
(5V)
Use Pr. 73
Pr. 903
Pr. 902
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