4.1 Test Run
4-3
Chapter 4 OPERATION
4.1.4 Selecting an inverter drive mode (HD/MD/LD)
The FRENIC-MEGA inverter is available in three different drive modes; HD (High Duty: for heavy duty load
applications), MD (Medium Duty: for medium duty load applications), and LD (Low Duty: for light duty load
applications), and the user can switch the drive modes on site. (The MD mode is supported by the 400 V
class series of inverters with 90 kW or above.)
Table 4.1-1
F80
data
Drive mode Application Continuous current rating level
Overload
capability
Maximum
frequency
0
HD (High Duty)
mode:
Heavy duty
load
Capable of driving a motor whose
capacity is the same as the
inverter's one.
150% for 1
min, 200%
for 3 s
500 Hz
2
MD (Medium Duty)
mode:
Medium duty
load
applications
Capable of driving a motor whose
capacity is one rank higher than
the inverter's one.
150% 1 min
120 Hz
1 LD (Low Duty) mode:
Light duty
load
applications
Capable of driving a motor whose
capacity is one or two ranks higher
than the inverter's one.
120% 1 min 120 Hz
The MD-/LD-mode inverter brings out the continuous current rating level which enables the inverter to drive
a motor with one or two ranks higher capacity, but its overload capability (%) against the continuous current
level decreases. For the rated current level, refer to Chapter 12 "SPECIFICATIONS."
When the optional multi-function keypad (TP-G1-J1) is used, description of data 2 of the function code
F80 may not be displayed depending on the keypad version, but setting can be done normally.
("2: Medium D" may be displayed as "2: ---".)
In the MD/LD modes, the inverter is subject to restrictions on the function code data setting range and
internal processing as listed below.
Table 4.1-2
Function
code
Name HD mode MD mode LD mode Remarks
F21
*
DC braking
(braking level)
Setting range: 0
to 100%
Setting range: 0 to 80%
F26
Motor sound
(carrier
frequency)
Data setting
range
0.75 to 16 kHz
(0.4 to 55 kW)
0.75 to 10 kHz
(75 to 400 kW)
0.75 to 6 kHz
(500 and 630
kW)
Data setting
range
0.75 to 2 kHz
(90 to 400 kW)
Data setting
range
0.75 to 16 kHz
(5.5 to 18.5 kW)
0.75 to 10 kHz
(22 to 55 kW)
0.75 to 6 kHz
(75 to 500 kW)
0.75 to 4 kHz
(630 kW)
In the MD/LD mode, a value out
of the range, if specified,
automatically changes to the
maximum value allowable in the
LD mode.
F44
Current limiter
(mode
selection)
Initial value:
160%
Initial value:
145%
Initial value:
130%
Switching the drive mode with
function code F80 automatically
initializes the F44 data to the
value specified at left.
F03
*
Maximum
frequency
Setting range:
25 to 500 Hz
Upper limit: 500
Hz
Setting range: 25 to 500 Hz
Upper limit: 120 Hz
In the MD/LD mode, if the
maximum frequency exceeds
120 Hz, the actual output
frequency is internally limited to
120 Hz.
―
Current
indication and
output
Based on the
rated current
level for HD
mode
Based on the
rated current
level for MD
mode
Based on the
rated current
level for LD
mode
Switching between the drive modes does not automatically change the motor rated capacity (P02
*
) to the
one suitable for the rank-changed motor, so configure the P02* data to match the applied motor rating as
required.
To Next Page
Loading...
Need help?
General
