Hitachi SJ Series User Manual page 423

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Outputting a signal when the

frequency reaches around 0 Hz

• I want to detect that the output frequency to the

motor has reached around 0 Hz and make a

notification to the system.

• Assign the output terminal function 040 [ZS] 0-Hz

detection signal to one of [CC-01] to [CC-07] that

corresponds to the output terminal and output the

• This function is to output a signal when the output

frequency of the inverter becomes lower than the

level specified with the 0-Hz detection value level

• When the feedback circuit board is used, the actual

frequency of the motor is evaluated for outputting

command [FW]

Output terminal

function selection

Relay output

terminal function

Relay output

terminal function

0-Hz detection

[CC-01]~[CC-05]

0.00~100.00(Hz)

• While the operation is stopped, the [ZS] signal

becomes ON state because the frequency is 0 Hz.

[ZS]: The 0-Hz signal is output to the

output terminal assigned.

The frequency setting value to estimate

0-Hz state when [ZS] is output.

Inverter Function

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