6-4
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 MxC frequency reference when the multi-function input allo-
cated 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 (Terminal A3 Function Selection) to 2
(auxiliary frequency reference, 2nd step analog) and set on of the multi-function input terminals to Multi-Step
Speed Reference 1.
When using a current input to terminal A2 for the master speed frequency reference, set H3-08 (Terminal A2
Signal Level Selection) to 2 (current input), and set H3-09 (Terminal A2 Function Selection) to 0 (add to ter-
minal A1).
Fig 6.4 Switching between Master and Auxiliary Frequencies
A1
A2
A3
Master speed
frequency reference
(voltage input)
Master speed
frequency reference
(current input)
Auxiliary speed
frequency reference 1
AC
Analog common
2 kΩ
+V
2 kΩ
S5
Multi-step speed
reference 1
4 to 20 mA
Power supply: 15 V,
20 mA
MxC
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