Omron VARISPEED E7 User Manual page 163

2-Step Switching: Master/Auxiliary
If 2-step switching between master and auxiliary speed frequencies is performed, input the master speed fre-
quency reference to control circuit terminal A1, and input the auxiliary speed frequency reference to A2.
When terminal S3 (multi-step speed command 1) is OFF, terminal A1 input (master speed frequency refer-
ence) will be the Inverter frequency reference, and when terminal S3 is ON, terminal A2 input (auxiliary
speed frequency reference) will be the Inverter frequency reference.
Setting Precautions
When inputting a voltage signal to terminal A2, turn OFF pin 2 on DIP switch S1 to switch to voltage input
(factory setting is ON).
Inputting Frequency Reference Using Current
When b1-01 is set to 1, the frequency reference can be input from control circuit terminal A2. Input the current
(4 to 20 mA) in control circuit terminal A2.
When H3-09 (Multi-Function analog input terminal A2 function selection) is set to 0 (factory setting) the
input on A2 is added to A1.
Setting Precautions
• When inputting a current signal to terminal A2, turn ON pin 2 on DIP switch S1 (factory setting: ON).
If using terminal A2 to input the master speed reference and terminal A1 to input the auxiliary frequency
•
reference, set H3-13 (Terminal A1/A2 Switching) to 1.
6-6
Master/
Auxiliary
2 k Ω
2 k Ω
0 to 10 V
0 to 10 V input
input
2 k Ω
Fig 6.7 Master/Auxiliary Frequency Reference Input
+V (Power supply: 15 V,
A1(Auxiliary frequency
4 to 20 mA
A2(Master frequency
AC (Analog common)
Fig 6.8 Frequency Reference Using Current
Inverter
S3 Multi-step speed
command 1
SN Digital input neutral
+V (Power supply: 15 V,
20 mA)
A1 (Master frequency
reference)
A2 (Auxiliary frequency
reference)
AC (Analog common)
DIP switch S1
Inverter
DIP switch S1