Hitachi SJ700-2 instruction manual Over-torque signal OTQ, Alarm code output function AC0 to AC3

Related code

C021 to C025: Terminal [11] to [15] functions

C062: Alarm code output

Chapter 4 Explanation of Functions

Related code

A044/A244/A344: V/F characteristic curve selection, 1st/2nd/3rd motors

C021 to C025: Terminal [11] to [15] functions

C055: Over-torque(forward-driving) level setting

C056: Over-torque (reverse regenerating) level setting

C057: Over-torque (reverse driving) level setting

C058: Over-torque (forward regenerating) level setting

4.2.64 Over-torque signal (OTQ)

The inverter outputs the over-torque signal when it detects that the estimated motor output torque exceeds the specified level.

To enable this function, assign function "07" (OTQ: over-torque signal) to an intelligent output terminal.

This function is effective only when the V/F characteristic curve selection selected with function "A044" or "A244" is the sensorless vector control, 0Hz-range sensorless vector control, or vector control with sensor. With any other V/F characteristic curve selection, the output of the OTQ signal is unpredictable.

When using the inverter for a lift, use the OTQ signal as the trigger to stop braking. Use the frequency-arrival signal as the trigger to start braking.

Item	Function code	Set value	Description
Terminal function	C021 to C025	07	OTQ: Over-torque signal
Alarm relay terminal function	C026
Over-torque (forward-driving) level	C055	0. to 200. (%)	Threshold level to output the OTQ signal
setting			during forward powering operation
Over-torque (reverse	C056	0. to 200. (%)	Threshold level to output the OTQ signal
regenerating) level setting			during reverse regeneration operation
Over-torque (reverse driving) level	C057	0. to 200. (%)	Threshold level to output the OTQ signal
setting			during reverse powering operation
Over-torque (forward	C058	0. to 200. (%)	Threshold level to output the OTQ signal
regenerating) level setting			during forward regeneration operation

4.2.65 Alarm code output function (AC0 to AC3)

The alarm code output function allows you to make the inverter output a 3- or 4-bit code signal as the trip factor when it has tripped.

Specifying "01" (3 bits) or "02" (4 bits) for the alarm code output (C062) forcibly assigns the alarm code output function to intelligent output terminals [11] to [13] or [11] to [14], respectively.

The following table lists the alarm codes that can be output:

Intelligent output terminals				When "4 bits" is selected		When "3 bits" is selected
14	13	12	11	Factor code	Cause of tripping	Factor code	Cause of tripping
AC3	AC2	AC1	AC0
0	0	0	0	Normal	Normal operation	Normal	Normal
0	0	0	1	E01 to E03,E04	Overcurrent protection	E01 to E03, E04	Overcurrent protection
0	0	1	0	E05, E38	Overload protection	E05	Overload protection
					Low-speed overload		Low-speed overload
					protection		protection
0	0	1	1	E07, E15	Overvoltage/input	E07, E15	Overvoltage/input
					overvoltage protection		overvoltage protection
0	1	0	0	E09	Undervoltage protection	E09	Undervoltage protection
0	1	0	1	E16	Instantaneous power failure	E16	Instantaneous power
					protection		failure protection
0	1	1	0	E30	IGBT error	E30	IGBT error
0	1	1	1	E06	Braking resistor overload	－	Other error
					protection
1	0	0	0	E08, E11, E23	EEPROM, CPU, GA
					communication, or main	－	－
				E25	circuit error
1	0	0	1	E10	CT error	－	－
1	0	1	0	E12, E13, E35,	External trip, USP error,
					thermistor error, or braking	－	－
				E36	error
1	0	1	1	E14	Ground-fault protection	－	－
					Invalid instruction in easy
					sequence
1	1	0	0	E43, E44, E45	Nesting error in easy	－	－
					sequence
					Easy sequence execution
					command error

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