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Chapter 4
4.2.62 Running time over and power-on time over signals (RNT and ONT)
The inverter outputs the operation time over (RNT) signal or the
plug-in time over (ONT) signal when the time specified as
the run/power-on warning time (b034) is exceeded.
Item
Run/power-on warning time
(1) Operation time over (RNT) signal
To use this signal function, assign function "11" (RNT) to one of the intelligent output terminals [11] to [15] (C021 to
C025) and the alarm relay terminal (C026).
Specify the run/power-on warning time (b034).
(2) Plug-in time over (ONT) signal
To use this signal function, assign function "12" (ONT) to one of the intelligent output terminals [11] to [15] (C021 to
C025) and the alarm relay terminal (C026).
Specify the run/power-on warning time (b034).
4.2.63 0 Hz speed detection signal (ZS)
The inverter outputs the 0 Hz speed detection signal when the inverter output
frequency falls below the threshold frequency specified as the zero speed
detection level (C063).
To use this signal function, assign function "21" (ZS) to one of the intelligent
output terminals [11] to [15] (C021 to C025) and the alarm relay terminal
(C026).
This signal function applies to the inverter output frequency when the V/F characteristic curve selection is based on
the constant torque characteristic (VC), reduced-torque characteristic (1.7th power of VP), free V/f characteristic,
sensorless vector control, or 0Hz-range sensorless vector control. It applies to the motor speed when the V/F
characteristic curve selection is based on the vector control with sensor.
Item
Terminal function
Alarm relay terminal function
Zero speed detection level
Function code
Range of data
0.
b034
1. to 9999.
1000 to 6553
Function code
Data or range of data
C021 to C025
C026
C063
0.00 to 100.0 (Hz)
4-64
Explanation of Functions
Related code
b034: Run/power-on warning time
C021 to C025: Terminal [11] to [15] functions
C026: Alarm relay terminal function
d016: Cumulative operation RUN time
monitoring
d017: Cumulative power-on time monitoring
Description
Disabling the signal output
Setting in units of 10 hours
Setting in units of 100 hours
(range: 100,000 to 655,300 hours)
Related code
A044/A244/A344: V/F characteristic curve
selection, 1st/2nd/3rd motors
C021 to C025: Terminal [11] to [15]
functions
C063: Zero speed detection level
21
ZS: 0 Hz speed detection signal
Setting of the frequency to be
determined as 0 Hz
Description
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