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Maintenance Operations
The Inverter does not operate or the motor operates only briefly when
■
the Controller power supply is turned OFF.
Faulty Sequence
●
The motor will not operate if both the Forward/Stop Command (STF) and the Reverse/Stop Com-
mand (STR) are input at the same time. Correct the sequence.
●
Malfunction due to Unwanted Current Path (when Using an Internal Power Supply
for a Model with an NPN Input)
The Inverter input may remain ON if there is an unwanted current path in the controller output.
With the wiring shown below, the Inverter input will operate due to the current path indicated by the
arrow if the controller output power supply is less than 24 VDC or the power supply is OFF. If this
occurs, insert a diode as indicated in the diagram at section A.
Controller (Output Unit)
4-8
Section A
SS0
SS1
STF
STR
SC
Chapter 4
Inverter (Control input)
24 V
GND
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