Hitachi SJ Series, User Manual

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12-21-4
Chapter 12 Inverter Function
12.21.4 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
signal.
• 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
[CE-33].
• When the feedback circuit board is used, the actual
frequency of the motor is evaluated for outputting
the signal.
Parameter
• While the operation is stopped, the [ZS] signal
becomes ON state because the frequency is 0 Hz.
Item Parameter Data Description
Output terminal
function selection
[CC-01]~[CC-05]
040
[ZS]: The 0-Hz signal is output to the
output terminal assigned.
Relay output
terminal function
selection
[CC-06]
Relay output
terminal function
selection
[CC-07]
0-Hz detection
value level
[CE-33] 0.00~100.00(Hz)
The frequency setting value to estimate
0-Hz state when [ZS] is output.
Ｑ
Ａ
！
Output
Frequency
[ZS]
[CE-33]
Operation
command [FW]
ON
OFF