fuji faq

How Do I Deal With The dbH Alarm Code?

Fuji 3/22/2018
How Do I Deal With The dbH Alarm Code?dbH - Means that the thermal function for the braking resistor has been activated. Please check the following for possible causes and measures.

How Do I Deal With The dbH Alarm Code?

Notes

Overheating of the braking resistor does not monitor the surface temperature of the braking resistor and issues an alarm, but monitors the magnitude of the braking load and issues an alarm. Therefore, even if the surface temperature of the braking resistor itself does not rise, F50 (Electronic thermal - for braking resistor protection (discharge withstand capacity)), F51 (Electronic Thermal - Braking Resistor Protection (Average Power Dissipation) The alarm will be issued when the usage frequency exceeds the set frequency.

One point advice

Please confirm the discharge capacity and average allowable loss when using the braking resistor (option) as follows.
 
Braking unit for HD specifications - Braking resistor (standard item)

How Do I Deal With The dbH Alarm Code?
How Do I Deal With The dbH Alarm Code?
(Note) English characters are included in inverter type ?. S (basic type), E (EMC filter built-in type), H (built-in DC reactor type).

Braking unit for LD specifications - Braking resistor (standard product)

How Do I Deal With The dbH Alarm Code?
How Do I Deal With The dbH Alarm Code?
(Note) English characters are included in inverter type ?. S (basic type), E (EMC filter built-in type), H (built-in DC reactor type).

Braking unit for MD specification · Braking resistor (standard item)

How Do I Deal With The dbH Alarm Code?
(Note) English characters are included in inverter type ?. S (basic type), E (EMC filter built-in type), H (built-in DC reactor type).

Braking resistor for HD specification (10% ED item)

How Do I Deal With The dbH Alarm Code?
(Note) English characters are included in inverter type ?. S (basic type), E (EMC filter built-in type), H (built-in DC reactor type).
* Since it does not have a function to output the temperature detection signal, it is necessary to set the electronic thermal function (function code F50, F51, F52) for protecting the braking resistor.

Braking resistor for LD specification (10% ED product)

How Do I Deal With The dbH Alarm Code?
(Note) English characters are included in inverter type ?. S (basic type), E (EMC filter built-in type), H (built-in DC reactor type).
* Since it does not have a function to output the temperature detection signal, it is necessary to set the electronic thermal function (function code F50, F51, F52) for protecting the braking resistor.

When using other than our company's braking resistor (option), calculate setting data by the following calculation formula.

F50 (Electronic Thermal - Protection for Protection of Braking Resistance (Discharge Capacity)) Discharge capability is the allowable amount of electricity for one braking. It can be calculated from braking time and motor capacity. Use (Equation 9.2-1) for deceleration and (Equation 9.2-2) for constant speed.

How Do I Deal With The dbH Alarm Code?

F51 (Electronic Thermal - For Protecting Braking Resistance (Average Power Dissipation)) The average allowable loss is the resistance capacity that allows the motor to operate continuously. It can be calculated from% ED (%) and motor capacity (kW). Use (Equation 9.2-3) for deceleration and (Equation 9.2-4) for constant speed.

How Do I Deal With The dbH Alarm Code?