Frequency Reference
6-5
Frequency Reference
This section explains how to input the frequency reference.
Selecting the Frequency Reference Source
Set constant b1-01 to select the frequency reference source.
Related Constants
Input the Frequency Reference from the Digital Operator
When b1-01 is set to 0, you can input the frequency reference from the Digital Operator.
For details on setting the frequency reference, refer to Chapter 3 Digital Operator and Modes.
Fig 6.2 Frequency Setting Display
Inputting the Frequency Reference Using Voltage (Analog Setting)
When b1-01 is set to 1, you can input the frequency reference from control circuit terminal A1 (voltage input),
or control circuit terminal A2 (voltage or current input).
Inputting Master Speed Frequency Reference Only
If inputting the master speed frequency reference only, input the voltage reference to control circuit terminal
A1.
Fig 6.3 Master Speed Frequency Reference Input
Con-
stant
Number
Name Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Access
Level
b1-01 Reference selection
Set the frequency reference source
0: Digital Operator
1: Control circuit terminal (analog input)
2: MEMOBUS communications
3: Option Card
0 to 3 1 No Q
Inverter
A1 (Master frequency reference)
+V (Power supply: 15 V, 20 mA)
A2 (Auxiliary frequency reference)
AC (Analog common)
2 kΩ
2 kΩ
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