211
Using Intelligent Output Terminals Section 4-6
4-6-16 Zero Hz Speed Detection Signal
The inverter outputs the 0Hz speed detection signal when the inverter output
frequency falls below the threshold level (
C063).
To use this function, assign "21 (ZS)" to one of the intelligent output terminals.
Option
Code
Terminal
Symbol
Function
Name
State Description
21 ZS Zero Hz
speed
detection
signal
ON Output frequency is less than C063
OFF Output frequency is not less than
C063
Valid for inputs: 11, 12, AL0 - AL2
Required settings: C063
Notes:
• The example circuit for terminal [11] drives a relay coil. Note the use of a diode to
prevent the negative-going turn-off spike generated by the coil from damaging the
inverter's output transistor.
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