9.2 Details of Function Codes
9-117
Chap. 9 FUNCTION CODES
J68 Braking Signal (Brake-OFF current)
J69 Braking Signal (Brake-OFF frequency)
J70 Braking Signal (Brake-OFF timer)
J71 Braking Signal (Brake-ON frequency)
J72 Braking Signal (Brake-ON timer)
These function codes define braking conditions for turning the terminal command BRKS on
or off to release or activate the brake of hoisting/elevating machines.
Releasing the brake
If the inverter judges that the motor generates torque by checking that the output current or
output frequency exceeds the specified level (J68/J69) and stays above the level for the period
specified by J70, then it turns the BRKS ON to release the brake.
Function code Name Data setting range
J68 Brake-OFF current
0 to 200%:
Set it assuming the inverter rated current as 100%.
For the single-phase 100 V class series, see note below.
J69 Brake-OFF frequency 0.0 to 25.0 Hz
J70 Brake-OFF timer 0.0 to 5.0 s
For the single-phase 100 V class series, J68 (Brake-OFF current) should be
calculated based on the reference current as shown below.
Inverter type FRN_ _ _ _C2S-6U 0001 0002 0003 0005
Nominal applied motor (HP) 1/8 1/4 1/2 1
Reference current (A) 0.8 1.5 3.0 5.0
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