Hitachi SJ700-2 instruction manual 63 0 Hz speed detection signal ZS

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

Chapter 4 Explanation of Functions

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.

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

Item	Function code	Range of data	Description
		0.	Disabling the signal output
			Setting in units of 10 hours
Run/power-on warning time	b034	1. to 9999.
			Setting in units of 100 hours
		1000 to 6553
			(range: 100,000 to 655,300 hours)

(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	Function code	Data or range of data	Description
Terminal function	C021 to C025	21	ZS: 0 Hz speed detection signal
Alarm relay terminal function	C026
Zero speed detection level	C063	0.00 to 100.0 (Hz)	Setting of the frequency to be
			determined as 0 Hz

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