6-8
Switch between 2 Step Speeds: Master/Auxiliary Speeds
When switching between the master and auxiliary speeds, input the master speed frequency reference to con-
trol circuit terminal A1 and the auxiliary speed frequency reference to control circuit terminal A2 . The
master speed frequency reference input to terminal A1 will be used for the Inverter frequency reference when
the master speed reference 1 allocated to multi-function input terminal (factory setting: S5) is OFF, and the
auxiliary speed frequency reference input to terminal A2 will be used for the Inverter frequency refer-
ence when the multi-speed reference 1 allocated to multi-function input terminal is ON.
When using terminal A2 as the input terminal of auxiliary speed frequency reference, set H3-09 (Multi-func-
tion analog input terminal A2 function selection) to 2 [Auxiliary speed reference frequency 1 (2nd speed ana-
log)].
Fig 6.6 Switching between Master and Auxiliary Frequencies
Precautions on Setting DIP Switches and Constants
• When inputting voltage signals to terminal A2, set the pin 2 of the current/voltage switching DIP switch
S1-2 to OFF side (factory setting: ON).
• When inputting current signals to terminal A2, set the pin 2 of the current/voltage switching DIP switch
S1-2 to ON side (factory setting: ON).
• When setting terminal A2 as the master speed frequency input terminal and terminal A1 as the auxiliary
speed frequency input terminal, set the H3-09 (Multi-function analog input terminal A2 function selection)
to 2 and H3-05 (Multi-function analog input terminal A3 function selection) to a number other than 0 and
And then, set H3-13 (Terminal A1/A2 switching) to 1.
•
or A3
or A3
When using terminal A3 as the input terminal of auxiliary speed frequency reference, set H3-05 (Multi-func-
tion analog input terminal A3 function selection) to 2 [Auxiliary speed frequency reference 1 (2ndspeed
analog)].
Inverter
+V (Power supply: 15 V,
20 mA)
A1 (Auxiliary speed
frequency refrence)
AC (Analog common)
DIP switch S1
A2 (A3)
(Master speed
frequency refrence)
1 to 20 mA input
H3-05 (Multi-function analog input terminal A3 function selection) to a number other than 0 and 2.
H3-09 and H3-05 cannot be set to 2 at the same time.
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