YASKAWA G7 Series Technical Manual page 222

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 Drive 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.
When switching between the master and auxiliary speeds, set H3-05 (Multi-function analog input terminal
A3) to 2 (auxiliary frequency reference, 2nd step analog) and set on of the multi-function input terminals to
multi-step speed reference 1.
When inputting a current to terminal A2 for the master speed frequency reference, 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 terminal A1).
Setting Frequency Reference Using Pulse Train Signals
When b1-01 is set to 4, the pulse train input to control circuit terminal RP is used as the frequency reference.
Set H6-01 (Pulse Train Input Function Selection) to 0 (frequency reference), and then set the 100% reference
pulse frequency to H6-02 (Pulse Train Input Scaling).
Low level voltage
High level voltage
Pulse frequency
-4
6
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2 kΩ
2 kΩ
Fig 6.4 Switching between Master and Auxiliary Frequencies
Pulse Input Specifications
0.0 to 0.8 V
3.5 to 13.2 V
Heavy duty 30 to 70%
0 to 32 kHz
Fig 6.5 Frequency Reference Using Pulse Train Input
Inverter
S5 Multi-step speed
reference 1
+V Power supply: 15 V,
20 mA
Master speed
A1 frequency reference
(voltage input)
Master speed
4 to 20 mA
frequency reference
A2
(current input)
Auxiliary speed
A3
frequency reference 1
AC Analog common
32 kHz max.
3.5 to 13.2 V
RP(Pulse train input termi-
nal)
Pulse input
AC (Analog common)
Drive