Hitachi SJ700B manual Protective Functions, 〈Status Display〉

Page 24

PROTECTIVE FUNCTIONS

 

 

 

 

Display

Display on remote

Name

Cause(s)

operator/copy unit

on digital

 

 

operator

ERR1****

 

The inverter output was short-circuited, or the motor shaft is locked or has a

While at constant speed

OC.Drive

Over-current protection

During deceleration

OC.Decel

heavy load. These conditions cause excessive current for the inverter, so the

During acceleration

OC.Accel

 

inverter output is turned off.

 

 

Others

Over.C

Overload protection(*1)

When a motor overload is detected by the electronic thermal function, the inverter trips and turns off its

Over.L

output.

 

Braking resistor

When the regenerative braking resistor exceeds the usage time allowance or an over-voltage caused by the

OL.BRD

overload protection

stop of the BRD function is detected, the inverter trips and turns off its output.

 

 

 

Over-voltage protection

When the DC bus voltage exceeds a threshold, due to regenerative energy from the motor, the inverter trips

Over.V

and turns off its output.

 

EEPROM error(*2)

When the built-in EEPROM memory has problems due to noise or excessive temperature, the inverter trips

EEPROM

and turns off its output.

 

Under-voltage error

A decrease of internal DC bus voltage below a threshold results in a control circuit fault. This condition can

Under.V

also generate excessive motor heat or cause low torque. The inverter trips and turns off its output.

CT(Current transformer) error

If a strong source of electrical interference is close to the inverter or abnormal operations occur in the

CT

built-in CT, the inverter trips and turns off its output.

 

CPU error

When a malfunction in the built-in CPU has occurred, the inverter trips and turns off its output.

CPU

External trip

When a signal to an intelligent input terminal configured as EXT has occurred, the inverter trips and turns

EXTERNAL

off its output.

 

USP error

An error occurs when power is cycled while the inverter is in RUN mode if the Unattended Start Protection

USP

(USP) is enabled. The inverter trips and does not go into RUN mode until the error is cleared.

Ground fault

The inverter is protected by the detection of ground faults between the inverter output and the motor during

GND.Flt.

power-up tests. This feature protects the inverter only.

 

Input over-voltage protection

When the input voltage is higher than the specified value, it is detected 60 seconds after power-up and the

OV.SRC

inverter trips and turns of its output.

 

Instantaneous power failure

When power is cut for more than 15ms, the inverter trips and turns off its output. If power failure continues,

Inst.P-F

Temperature error due to low

the error will be cleared. The inverter restarts if it is in RUN mode when power is cycled.

 

The inverter will display the error code shown on the right if the lowering of cooling-fan speed is detected at

OH.stFAN

cooling-fan speed

the occurrence of the temperature error described below.

 

Inverter thermal trip

When the inverter internal temperature is higher than the specified value, the thermal sensor in the inverter

OH FIN

 

module detects the higher temperature of the power devices and trips, turning off the inverter output.

GA.COM

Gate array error

Communication error has occurred between CPU and gate array.

 

Phase loss detection

One of three lines of 3-phase power supply is missing.

 

PH.Fail

Main circuit error (*3)

The inverter will trip if the gate array cannot confirm the on/off state of IGBT because of a malfunction due

Main.Cir

to noise or damage to the main circuit element.

 

 

 

 

Cooling-fan speed drop signal

If the rotation speed of the internal cooling fan decreases so that the cooling effect decreases,inverter

Fan. Slow

output turns OFF for protection.(available only for SJ700 1850-4000)

 

 

 

 

IGBT error

When an instantaneous over-current has occurred, the inverter trips and turns off its output to protect main

IGBT

circuit element.

 

 

 

 

Thermistor error

When the thermistor inside the motor detects temperature higher than the specified value, the inverter trips

TH

 

and turns off its output.

 

 

Braking error

The inverter turns off its output when it can not detect whether the braking is ON or OFF within waiting time

BRAKE

set at b024 after it has released the brake. (When braking is enabled at b120)

 

Emergency stop (*4)

If the EMR signal (on three terminals) is turned on when the slide switch (SW1) on the logic board is set to

EMR

ON, the inverter hardware will shut off the inverter output and display the error code shown on the right.

 

 

 

If overload occurs during the motor operation at a very low speed at 0.2 Hz or less, the electronic thermal protection

OL-LowSP

Low-speed overload protection

circuit in the inverter will detect the overload and shut off the inverter output. (2nd electronic thermal control)

 

(Note that a high frequency may be recorded as the error history data.)

 

 

Modbus communication error

If timeout occurs because of line disconnection during the communication in Modbus-RTU mode, the inverter

NET.ERR

will display the error code shown on the right. (The inverter will trip according to the setting of "C076".)

Out of operation due

Due to insufficient voltage, the inverter has turned off its output and been trying to

 

UV.WAIT

to under-voltage

restart. If it fails to restart, it goes into the under-voltage error.

 

 

PRG.CMD

 

 

 

Easy sequence function Error

Error indications by protective functions with the easy sequence function used.

 

PRG.NST

 

 

 

PRG.ERR1

Expansion card 1 connection error

An error has been detected in an expansion card or at its connecting terminals.

～

OP1-0 ～ OP1-9

 

Expansion card 2 connection error

～

OP2-0 ～ OP2-9

 

(*1): Reset operation is acceptable 10 seconds after the trip.(185kW and over :90 seconds) (*2): Check the parameters when EEPROM error occurs.(*3): The inverter will not accept reset commands input via the RS terminal

or entered by the STOP/RESET key. Therefore, turn off the inverter power. (*4): The inverter will not accept the reset command entered from the digital operator. Therefore, reset the inverter by turning on the RS terminal.

〈Status Display〉

 

 

 

 

 

 

 

 

 

 

Code

Description

Code

Description

Code

Description

Code

Description

Code

Description

 

0

Reset

2

Deceleration

4

Acceleration

6

Starting

8

Overload Restriction

 

1

Stop

3

Constant Speed

5

f0 Stop

7

DB

9

Forcible or servo-on

〈How to access the details about the present fault〉

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Output frequency

Error code Status at trip point

at trip point

Motor current at trip point

 

 

 

 

Voltage between

 

Cumulative inverter

 

P(+) and N(－) at trip point

RUN time at trip point

Cumulative power-on time at trip point

23

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Contents For More Precise Control When inverter is one frame size larger than motor TorqueSpeed min FrequencyMeets EN61800-3 2nd-Environment Frequency HzBasic mode Indication only Basic Parameter Chose Basic ParameterRead write Control circuit terminals comparison tableEU RoHS compliant except solder in power module =650V, cable=100mStandard Specifications Phase 200V classPhase 400V class Weight lbs 900HFFIP00 Rated capacity 400VSpecifications General SpecificationsInput terminals Dimensions Unit mminchInches for reference only ・SJ700-750, 900HFEF2, HFUF2, HFF2 ・SJ700B-900, 1100HFF SJ700-1850,2200HFE2 Model DCL-H-185-H-R 305 DCL-H-220-H-R 395 315Setting the output frequency Contents of a basic mode display.defaultFunction List 100 50.015.00 A094 A294A095 A296B028 B029B030 B031Others B132B133 B134C030 C031C033 C032C149 C151C150 C154Output 268435455 Not available for SJ700B1024 135.0 25.0 100Operator Operator, CableOperator Terminals Main Circuit TerminalsTerminal Symbol Specifications 11A Contacting Maximum Rate Analog Digital DigitalAnalogRun Contact〈How to access the details about the present fault〉 Protective Functions〈Status Display〉 Connecting Diagram Source type logicSink type logic OperatingToConnecting to PLC Connection with Input TerminalsWire 75mm2 200VShielded 75mm2Torque Charactoristic SJ700 Series / Maximum Torque with Short Time RatingSJ700B Series / Maximum Torque with Short Time Rating Output frequency HzDerating Data SJ700/SJ700B Series / Torque Under Continous OperationTherating% Rating%Those with compatibility Option boardsBasic display mode/Data comparison function addition You can mount the SJ300 series into the SJ700 seriesOI-L input start frequency enable Those with compatibility Option boardsD007Scaled output frequency monitoring External frequency filter time constMemo Characteristic of the motor Temperature increaseApplication to Motors MechanismMain power supply Precaution for Correct UsageHigh-frequency Noise and Leakage Current Lifetime of Primary Parts
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