2. Stop the inverter.
3. Set the inverter to a state when the power supply is cut off during normal operation.
4. Set Main Circuit Capacitor Service Life Coefficient (Measurement Value) (3008Hex-2BHex) and
Main Circuit Capacitor Service Life Coefficient (Initial V
alue) (3008Hex-30Hex) to 0000, respective-
ly.
5. Cut off the power supply to the inverter (the operation described below is executed automatically
when the power is cut off).
Measure the discharge time of the main circuit capacitor and save it to Main Circuit Capacitor
Service Life Coefficient (Initial Value) (3008Hex-30Hex).
The measurement conditions for main circuit capacitor are detected automatically, and the condi-
tions are saved.
6. Turn ON the inverter power supply again.
Make sure Main Circuit Capacitor Service Life Coefficient (Measurement Value) (3008Hex-2BHex)
and Main Circuit Capacitor Service Life Coefficient (Initial Value) (3008Hex-30Hex) are correct.
Make sure Main Circuit Capacitor’s Capacitor Monitor (3010Hex-4CHex) is 100%.
If measurement fails, 0001 is set respectively at Main Circuit Capacitor Service Life Coefficient
(Measurement Value) (3008Hex-2BHex) and Main Circuit Capacitor Service Life Coefficient (Initial
Value) (3008Hex-30Hex). Remove the cause of the failure and perform measurement again.
If the conditions described above are satisfied when the power supply is cut off the next time, the
discharge time of the main circuit capacitor is measured automatically. Periodically check Main Cir-
cuit Capacitor’s Capacitor Monitor (3010Hex-4CHex).
• A large measurement error may occur in the measurement method described above. If life estima-
tion is performed in this mode, return the judgment standard for the service life of the main circuit
capacitor in Protection/Maintenance Function Mode Selection (3008Hex-63Hex) to the factory de-
fault standard, perform the measurement again under the factory default conditions, and check the
service life.
8-8-11
Braking Transistor Broken (DBAL)
Use this signal to determine the life expectancy of the internal capacitor based on the inverter’s inter-
nal temperature, conduction time, and the capacity of the capacitor
.
When bit 6 = 1 at Protection/Maintenance Function Mode Selection (3008Hex-63Hex), an error in the
built-in braking transistor is detected, the inverter is topped, and the braking transistor error (alarm
code: 3B) is displayed.
When bit 6 = 0 at Protection/Maintenance Function Mode Selection (3008Hex-63Hex), the braking
transistor is not used and an alarm does not occur
.
Parameter No. Function name Data Default data Unit
3005Hex-15Hex/
3005Hex-1CHex
Output Terminal [DO1] Func-
tion Selection/Output Terminal
[ROA, ROB] Function Selec-
tion
105: DBAL (Braking transistor
broken)
- -
8 Other Functions
8-87
M1 Series EtherCAT Type User’s Manual (I670)
8-8 Functions Related to Protection, Warning and Various Output Signals
8
8-8-11 Braking Transistor Broken (DBAL)