5-55
Data for
F31/F35
[FM1]/[FM2] output
Function
(Monitor the following)
Meter scale
(Full scale at 100%)
15 PID command (SV) Command value under PID control 100% of the feedback amount
16 PID output (MV)
Output level of the PID controller under
PID control (Frequency command)
Maximum frequency (F03)
If F31/F35 = 16 (PID output), J01 = 3 (Dancer control), and J62 = 2 or 3 (Ratio compensation enabled), the
PID output is equivalent to the ratio against the primary reference frequency and may vary within ±300% o
the frequency. The monitor displays the PID output in a converted absolute value. To indicate the value up to
the full-scale of 300%, set F30/F34 data to "33" (%).
F37 Load Selection/ Auto Torque Boost/ Auto Energy Saving Operation 1
F09 (Torque Boost 1)
H67 (Auto Energy Saving Operation (Mode selection)
F37 specifies V/f pattern, torque boost type, and auto energy saving operation in accordance with the characteristics of
the load.
Specify the torque boost level with F09 in order to assure sufficient starting torque.
Data for F37 V/f pattern Torque boost Auto energy saving Applicable load
0
Variable torque
V/f pattern
Variable torque load
(General-purpose fans and pumps)
1
Torque boost
specified by F09
Constant torque load
2
Linear
V/f pattern
Auto torque boost
Disable
Constant torque load
(To be selected if a motor may be
over-excited at no load.)
3
Variable torque
V/f pattern
Variable torque load
(General-purpose fans and pumps)
4
Torque boost
specified by F09
Constant torque load
5
Linear
V/f pattern
Auto torque boost
Enable
Constant torque load
(To be selected if a motor may be
over-excited at no load.)
If a required "load torque + acceleration toque" is more than 50% of the constant torque, it is recommended to
select the linear V/f pattern (factory default).
• Under the vector control with speed sensor, F37 is used to specify whether the auto energy saving operatio
is enabled or disabled. (V/f pattern and torque boost are disabled.)
Data for F37
Operation
0 to 2 Auto energy saving operation OFF
3 to 5 Auto energy saving operation ON
• Under the vector control without speed sensor, both F37 and F09 are disabled. The auto energy saving
operation is also disabled.
V/f characteristics
The FRENIC-MEGA series of inverters offers a variety of V/f patterns and torque boosts, which include V/f patterns
suitable for variable torque load such as general fans and pumps and for constant torque load (including special pumps
requiring high starting torque). Two types of torque boosts are available: manual and automatic.
Variable torque V/f pattern (F37 = 0) Linear V/f pattern (F37 = 1)
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