SJ700-2 Instruction Manual NT204DX - Hitachi America, Ltd.

Chapter 4 Explanation of Functions
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
Threshold level to output the OTQ signal
C055 0. to 200. (%)
setting
during forward powering operation
Over-torque (reverse
Threshold level to output the OTQ signal
C056 0. to 200. (%)
regenerating) level setting
during reverse regeneration operation
Over-torque (reverse driving) level
Threshold level to output the OTQ signal
C057 0. to 200. (%)
setting
during reverse powering operation
Over-torque (forward
Threshold level to output the OTQ signal
C058 0. to 200. (%)
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.
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
Related code
C021 to C025: Terminal [11] to [15] functions
C062: Alarm code output
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
AC3 AC2 AC1 AC0
Factor code Cause of tripping Factor code Cause of tripping
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
Overload protection
Overload protection
0 0 1 0 E05, E38 Low-speed overload
protection
E05 Low-speed overload
protection
0 0 1 1 E07, E15
Overvoltage/input
Overvoltage/input
E07, E15
overvoltage protection
overvoltage protection
0 1 0 0 E09 Undervoltage protection E09 Undervoltage protection
0 1 0 1 E16
Instantaneous power failure
Instantaneous power
E16
protection
failure protection
0 1 1 0 E30 IGBT error E30 IGBT error
0 1 1 1 E06
Braking resistor overload
protection
- Other error
1 0 0 0
EEPROM, CPU, GA
E08, E11, E23
communication, or main
E25
circuit error
-
-
1 0 0 1 E10 CT error - -
1 0 1 0
External trip, USP error,
E12, E13, E35,
thermistor error, or braking
E36
error
-
-
1 0 1 1 E14 Ground-fault protection - -
Invalid instruction in easy
sequence
1 1 0 0
Nesting error in easy
E43, E44, E45
sequence
Easy sequence execution
command error
-
-
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