11-10
Item
Specifications
Remarks
P
ro
tec
tive
func
tion
Overcurrent protection
• The inverter is stopped for protection against overcurrent.
Short-circuit protection
• The inverter is stopped for protection against overcurrent caused by a short circuit in the output circuit.
Ground fault protection
• The inverter is stopped for protection against overcurrent caused by a grounding fault in the output circuit.
(EQ7-x040-C or below).
• Detecting zero-phase current of output current, the inverter is stopped for protection against overcurrent caused by a
grounding fault in the output circuit. (EQ7-x050-C or above)
Overvoltage protection
• An excessive voltage (230V series: 400V DC, 460V series: 800V DC) in the DC link circuit is detected and the inverter is
stopped.If an excessive voltage is applied by mistake, the protection can not be guaranteed.
Undervoltage protection
• The voltage drop (230V series: 200V DC, 460V series: 400V DC) in the DC link circuit is detected to stop the inverter.
Input phase loss protection
• The input phase loss is detected to shut off the inverter output. This function protects the inverter.
• When the load to be connected is small or DC REACTOR is connected a phase loss is not detected.
Output phase loss detection
Detects breaks in inverter output wiring at the start of running and during running, stopping the inverter output.
Overheat protection
• Stop the inverter output detecting excess cooling fan temperature in case of a cooling fan fault or overload.
• Stop the inverter output detecting a fault of inner agitating fan. (EQ7-2075-C, EQ7-4125-C or above)
• Stop the inverter output detecting inner temperature of the inverter unit for a cooling fan fault or overload.
• Protect the braking resistor from over heat by setting the braking resistor electronic thermal function.
Overload protection
• Stop the inverter output detecting a cooling unit temperature of the inverter cooling fan and a switching element temperature
calculated with the output current.
External alarm input
• With the digital input signal (THR) opened, the inverter is stopped with an alarm.
Fuse breaking
• Stop the inverter output detecting the fuse breaking of the main circuit in the inverter. (EQ7-2125-C, EQ7-4150-C or
above)
Charging circuit abnormality
• Stop the inverter output detecting the charge circuit abnormality in the inverter. (EQ7-2060-C, EQ7-4125-C or above)
Brake transistor abnormality
• Stop the inverter detecting the brake transistor abnormality. (DB transistor built-in type only)
Over-speed protection *6 to *7
• Stop the inverter when the detected speed exceeds (max. output frequency) × (d32 data or d33 data) × 120% in the case of d35
= 999 *6
～
*7
• Stop the inverter when the detected speed exceeds (max. output frequency)×(d35 data) in the case of d35≠999 *6
• Stop the inverter when the detected speed exceeds 120Hz × 120% *6
• Stop the inverter when the detected speed exceeds 200Hz × 120% *7
PG breakwire *7
• Stop the inverter detecting the PG breaking.
M
o
tor
p
ro
tec
tion
Electronic thermal
• The inverter is stopped with an electronic thermal function set to protect the motor. Protects the general-purpose motor inverter
over all frequency range.(The running level and thermal time constant (0.5 to 75.0 min) can be set.)
PTC thermistor
• A PTC thermistor input stops the inverter to protect the motor. Connect a PTC thermistor between terminal V2 and 11 and set the
switch on control print board and the function code.
NTC thermistor
• The NTC thermistor detects a motor temperature. Connect a NTC thermistor between terminal V2 and 11 and set the switch on
control print board and the function code.
NTC thermistor broken
• Stop the inverter output detecting the built-in motor NTC breaking.
Overload early warning
• Warning signal (OL) is output at the predetermined level before stopping the inverter with electronic thermal function.
Memory error
• Data is checked upon power-on and data writing to detect any fault in the memory and to stop the inverter if any.
Keypad communications error
detection
• The keypad is used to detect a communication fault between the keypad and inverter main body during operation and to stop the
inverter.
CPU error
• Stop the invert detecting a CPU error or LSI error caused by noise.
Option communications error
• When each option is used, a fault of communication with the inverter main body is detected to stop the inverter.
Option error
• When each option is used, the option detects a fault to stop the inverter.
Operation error
• STOP key priority Pressing the STOP key on the keypad or entering the digital input signal will forcibly decelerate and stop the
motor even if the operation command through signal input or communication is selected. Er6 will be displayed after the stop.
• Start check: If the running command is being ordered when switching the running command method from power-on, alarm reset,
or the linked operation, the operation starts suddenly. This function bans running and displays Er6.
Tuning error
• Stop the inverter output when tuning failure, interruption, or any fault as a result of tuning is detected during tuning for motor
constant.
RS-485 communications error
(port1)
• When the connection port of the keypad connected via RS485 communication port to detect a communication error, The inverter
is stopped and displays an error.
Speed deviation excess *6 to *7
• Stop the inverter output when the speed deviation excesses the specified value (difference between speed command and
feedback).
Data save error upon undervoltage
• When the undervoltage protection function works, an alarm is displayed if the data is not properly saved.
Positioning Control Error
• Stop the inverter output when an excessive positioning deviation has occurred. *7
RS-485 communications error
(port2)
• Stop the inverter output detecting the communication error between the inverter main unit and a mate when the RS-485
connection port of the touch panel is used to configure the network.
Hardware error
• Stop the inverter output detecting the communication error between the inverter main unit and a mate when the RS-485
connection port of the touch panel is used to configure the network..
Simulation error
• Simulated alarm is output by the keypad operation.
EN Circuit Error
• The circuit to detect EN terminal status is broken (Single fault) *8
