Fuji Electric Frenic-Mini - Page 303

9.2 Details of Function Codes
9-101
Chap. 9 FUNCTION CODES
H71 Deceleration Characteristics

Setting the H71 data to "1" (ON) enables forced brake control. If regenerative energy
produced during deceleration of the motor and returned to the inverter exceeds the inverter’s
braking capability, an overvoltage trip will occur. The forced brake control increases the
motor energy loss during deceleration, increasing the deceleration torque.
This function is aimed at controlling the torque during deceleration; it has no effec
t
if there is braking load.
Enabling the automatic deceleration (anti-regenerative control, H69 = 2 or 4)
disables the deceleration characteristics specified by H71.
When replacing the original FRENIC-Mini series (FRNC1-) with the
upgraded one (FRNC2-), note the following.
The original FRENIC-Mini series (FRNC1-) does not support H71,
but H71 may be set to "1." On the upgraded one, however, it is not necessary to se
t
H71 to "1."
H76
Automatic Deceleration (Frequency increment limit for braking)
H69 (Automatic Deceleration, Mode selection)
For details about the function of H76, refer to the description of H69.
H78
H94
Maintenance Interval
Cumulative Motor Run Time 1
H78 (Maintenance interval) specifies the maintenance interval in units of ten hours.
The maximum setting is 9999 × 10 hours.
- Data setting range: 0 (Disable); 1 to 9999 (in units of ten hours)
 Maintenance timer -- MNT (E20 and E27, data = 84)
When the cumulative motor run time 1 (H94) reaches the time specified by H78
(Maintenance interval), the inverter outputs the maintenance timer signal MNT (if assigned
to any digital terminal with any of E20 and E27) to remind the user of the need of the
maintenance of the mechanical system.
 Cumulative motor run time 1 (H94)
Operating the keypad can display the cumulative run time of motor 1. This feature is useful
for management and maintenance of the mechanical system. H94 allows you to set the
cumulative run time of the motor to the desired value, which enables setting an arbitrary
initial data to determine a parts or inverter replacement timing. Specifying "0" clears the
cumulative run time of the motor.