YASKAWA Varispeed G7 Series Instruction Manual page 236

Inputting the Frequency Reference Using Control Circuit Terminal (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 (Voltage Input)
When inputting a voltage for the master speed frequency reference, input the voltage to control circuit termi-
nal A1.
Fig 6.2 Voltage Input for Master Speed Frequency Reference
Inputting Master Speed Frequency Reference Only (Current Input)
When inputting a current for the master speed frequency reference, input the current to control circuit terminal
A2, input 0 V to terminal A1, set H3-08 (Multi-function analog input terminal A2 signal level selection) to 2
(current input), and set H3-09 (Multi-function analog input terminal A2 function selection) to 0 (add to termi-
nal A1).
Fig 6.3 Current Input for Master Speed Frequency Reference
Turn ON pin 2 of DIP switch S1 (toward I), the voltage/current switch, when inputting a current to terminal A2.
Turn OFF pin 2 of DIP switch S1 (toward V), the voltage/current switch, when inputting a voltage to terminal
A2. Set H3-08 to the correct setting for the type of input signal being used.
IMPORTANT
Switch between 2 Step Speeds: Master/Auxiliary Speeds
When switching between the master and auxiliary speeds, connect the master speed frequency reference to
control circuit terminal A1 or A2 and connect the auxiliary speed frequency reference to terminal A3. The ref-
erence on terminal A1 or A2 will be used for the Inverter frequency reference when the multi-function input
allocated to multi-speed command 1 is OFF and the reference on terminal A3 will be used when it is ON.
+V Power supply: 15 V,
20 mA
Master speed frequency
2 kΩ A1
reference
Master speed frequency
A2
reference
A3
Auxiliary speed frequency
reference 1
AC Analog common
+V Power supply: 15 V,
20 mA
Master speed frequency
A1
reference
4 to 20-mA input
Master speed frequency
A2
reference
Auxiliary speed frequency
A3
reference 1
AC Analog common
Inverter
(voltage input)
(current input)
Inverter
(voltage input)
(current input)
1
DIP switch
2
S1
V I
Frequency Reference
6-
3