Fuji Electric Frenic Mega Series - Page 386

5.4 Details of Function Codes
5-205
Chapter 5 Function Code
Details of
Function Codes
F codes
E codes
C codes
P codes
H81 to H85
A codes
b codes
r codes
J codes
d codes
U codes
y codes
 Hexadecimal conversion table
A 4-bit binary number can be expressed in hexadecimal format. The table below shows the conversion table.
Table 5.4-141 Binary and Hexadecimal conversion
Binary Hexadec
imal
Binary Hexadec
imal
0 0 0 0 0 100 0 8
0 0 0 1 1 100 1 9
0 0 1 0 2 101 0 a
0 0 1 1 3 101 1 b
0 1 0 0 4 110 0 c
0 1 0 1 5 110 1 d
0 1 1 0 6 111 0 e
0 1 1 1 7 111 1 f
When H26 (thermistor (operation select)) data is set to "1" (PTC:
0h4 trips, and the inverter stops),
the light alarm is not output, and the inverter stops regardless of the setting of bit 11 (thermisto
r
detect (PTC)).
 Assignment of light alarm L-ALM (Function code E20 to E24, E27 data = 98)
When a light alarm occurs, light alarm
L-ALM turns on.
H84 and
H85
Pre-excitation (Initial level, Time)
A motor generates torque with magnetic flux and torque current. The rise of magnetic flux has the delay
element. Therefore, the torque does not happen sufficiently at the time of startup. To obtain enough torque
even at the moment of motor start, enable the pre-excitation so that magnetic flux is established before a
motor start.
 Pre-excitation (Initial level) (H84)
H84 sets the forcing function for the pre-excitation. It is used to shorten the pre-excitation time.
Basically, there is no need to modify the default setting.
- Data setting range: 100 to 400 (%)
 Pre-excitation (Time) (H85)
H85 sets the pre-excitation time before starting operation.
- Data setting range: 0.00 (Disable), 0.01 to 30.00 (s)
When a run command is input, the pre-excitation starts.
After the pre-excitation time elapses, the inverter judges magnetic flux to have been established and starts
acceleration. Specify H85 data so that enough time is secured for establishing magnetic flux. The
appropriate value for H85 data depends on the motor capacity. Use the default setting value of H13 data as
a guide.