Protective and Diagnostic Functions ● Error Code List Selection Features SYSDRIVE JX Series SYSDRIVE MX Series SYSDRIVE RX Series SYSDRIVE Option Overview of Inverter Selection Advanced General-purpose Inverters SYSDRIVE RX Series 51 Display on Digital Operator Name Description ek0k1. Overcurrent protection Constant speed If the motor is restrained or rapidly accelerated or decelerated, a large current will flow through the Inverter, which will result in breakage. The larger than specified current then shuts off the output and an error appears. The protection detects this overcurrent through AC CT (current detector).
The protection circuit operates at approximately 220% of the Inverter rated output current and a trip occurs. ek0k2. Deceleration ek0k3. Acceleration ek0k4. Others ek0k5. Overload protection *1 Monitors the Inverter output current and shuts off the output, displaying an error if the built-in electronic thermal function detects overload against the motor. Trips depending on the electronic thermal function settings. ek0k6. Braking resistor overload protection Shuts off the output and displays an error if the usage rate of regenerative braking circuit exceeds the b090 set value. ek0k7. Overvoltage protection Extremely high DC voltage between P/+2 and N/- may result in failure.
This function therefore shuts off the output and displays an error if the DC voltage between P/+2 and N/- exceeds the specified level because of regenerative energy from the motor or increase of the incoming voltage during operation. Trips when the DC voltage between P/+2 and N/- reaches approximately 400 V DC for 200-V class, and 800 V DC for 400-V class. ek0k8. EEPROM error *2 *3 Shuts off the output and displays an error if an error occurs because of external noise and abnormal temperature rise in the EEPROM built into the Inverter. Note: It may become a CPU error depending on the case. ek0k9. Undervoltage Shuts off the output if the incoming voltage drops below that specified.
This is because the control circuit fails to work properly, if the incoming voltage to the Inverter drops. Trips when the DC voltage between P and N reaches approximately 175 V DC for 200-V class, and 345 V DC for 400-V class. ek1k0. CT error Shuts off the output if an error occurs in the CT (current detector) built into the Inverter. Trips if the CT output is approximately 0.6 V or more when the power is turned on. ek1k1. CPU error *3 Shuts off the output and displays an error if the internal CPU has worked erroneously or abnormally. Note: If an abnormal value is read from EEPROM, it may become a CPU error depending on the case. ek1k2.
External trip If an error occurs in the external equipment or devices, the Inverter receives the signal, and the output is shut off. (Available with the external trip function selected) ek1k3. USP error Appears when the power is turned on with the RUN signal input into the Inverter. (Available with the USP function selected) ek1k4. Grounding protection *3 Protects the Inverter if a ground fault between the Inverter output unit and the motor is detected when turning on the power. (This function does not work when there is residual voltage in the motor.) ek1k5.
Incoming overvoltage protection Appears if the incoming voltage continues to be higher than the specification value for 100 seconds while the Inverter is stopped. Trips when the main circuit DC voltage reaches approximately 390 V DC for 200-V class, and 780 V DC for 400-V class. ek1k6. Momentary power interruption protection Shuts off the output when a momentary power interruption occurs for 15 ms or more. If the shutoff time is long, it is normally recognized as a power shutoff. Note that, when restart is selected, the Inverter restarts from recovery as long as the RUN command remains. ek2k0.
Temperature error when the rotation speed of the cooling fan decreases Appears if a decrease of the cooling fan rotation speed has been detected when the following temperature error occurs. ek2k1. Temperature error Shuts off the output if the temperature has risen in the main circuit because of the high ambient temperature. ek2k3. Gate array communications error Trips when a fault is detected in communication behavior between the built-in CPU and the gate array. ek2k4. Input open-phase protection Prevents Inverter damage due to input open-phase protection function when the input open-phase selection is enabled (b006=01), and trips. Trips when the open-phase time is approximately 1 s or more.
ek2k5. Main circuit error *3 Trips when the gate array cannot confirm IGBT ON/OFF because of erroneous operation or main element breakage caused by noise interfusion. ek3k0. IGBT error Shuts off the Inverter output to protect the main element when a momentary overcurrent, temperature error in the main element, or drop of the main element driving power supply occurs. (Retry operation cannot be performed after this trip.) ek3k5. Thermistor error Shuts off the Inverter output when detecting the thermistor resistance value inside the motor connected to the TH terminal and resulting motor temperature rise. ek3k6.
Brake error When 01 is selected in b120 (brake control selection), this error appears if the brake ON/OFF cannot be recognized within the b124 set time (brake confirmation wait time) after the Inverter outputs the brake release signal. ek3k7. Emergency shutoff *4 Shuts off the hardware output and displays an error when the EMR terminal (S3) is turned on with SW1 on the logic board ON. ek3k8. Overload protection in a low speed range If an overload is detected in the lowest speed range of 0.2 Hz max., an electronic thermal inside the Inverter works to shut off the Inverter output. (2nd electronic thermal level) (However, higher frequency could remain in the error history.) ek4k1.
Modbus communications error Appears when the timeout occurs because of disconnection during Modbus-RTU communication. (Trip by the C076 setting) ek0k3. ek0k4. ek0k5. ek0k7. ek0k8. ek0k9. ek1k0. ek1k1. ek1k2. ek1k3. ek1k4. ek1k5. ek2k0. ek2k1. ek2k3. ek2k4. ek2k5. ek3k0. ek3k5. ek3k6. ek3k7. ek3k8. ek4k1.