![background image](http://html1.mh-extra.com/html/omron/i537-e2-01/i537-e2-01_user-manual_743212136.webp)
6
-4
Frequency Reference
This section explains how to input the frequency reference.
Selecting the Frequency Reference Source
Set parameter b1-01 to select the frequency reference source.
Related Parameters
Input the Reference Frequency from the Digital Operator
When b1-01 is set to 0, you can input the reference frequency from the Digital Operator.
For details on setting the reference frequency, refer to Chapter 3 Digital Operator and Modes.
Fig 6.3 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 6.4 Master Speed Frequency Reference Input
Param-
eter
Number
Name
Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Access
Level
LCD Display
b1-01
Reference selection
Set the frequency reference source
0: Digital Operator
1: Control circuit terminal (analog
input)
2: RS-422A/485 communications
3: Option Card
0 to 3
1
No
Q
Reference Source
Inverter
A1 (Master speed frequency
reference)
+V (Power supply: 15 V,
20 mA)
A2 (Auxiliary speed frequency
reference)
AC (Analog common)
2 k
Ω
2 k
Ω