Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual page 551

 Connection diagram
Sink logic
Pr.186 = 19
Power supply
Load torque high-speed frequency
*1 The applied terminals differ by the settings of Pr.180 to Pr.189 (Input terminal function selection)
 Load torque high speed frequency control setting
• Set "2, 3 or 13" in Pr.270 Stop-on contact/load torque high- speed frequency control selection.
• When the Load torque high-speed frequency (X19) signal ON, the inverter automatically adjusts the maximum frequency
in the range between the Pr.4 Multi-speed setting (high speed) and Pr.5 in accordance with the average current in the
current averaging range. The current averaging range is from the 1/2 the Pr.5 Multi-speed setting (middle speed) to the
full Pr.5 setting (in the current averaging range).
• To use the X19 signal, set "19" in any of Pr.178 to Pr.189 (Input terminal function selection) to assign the function to
an input terminal.
• This is valid in External operation mode and Network operation mode.
• The control can be activated at every start.
 Operation of load torque high speed frequency control
• When the average current of the current averaging range (chart A below) during operation with the X19 signal ON is the
"inverter rated current ×Pr.271 setting (%)" or less, the maximum frequency automatically becomes the Pr.4 Multi-speed
setting (high speed) setting value.
• When the average current of the current averaging range (chart B below) during operation with the X19 signal ON is greater
than the "inverter rated current × Pr.272 setting (%)", the maximum frequency automatically becomes the Pr.5 Multi-
speed setting (middle speed) setting value.
• During regeneration load operation, the Pr.5 setting is the maximum frequency regardless of the average current.
• When Pr.273 is used, the current averaging range can be set between one half of the frequency of the Pr.273 setting value
and the Pr.273 set frequency. (However, the setting value must be smaller than Pr.5 setting.)
Pr.4
Pr.5
1
Pr.5
2
STF
(STR)
X19
550
5. PARAMETERS
5.14 (A) Application parameters
MC
MCCB
R/L1
S/L2
T/L3
Start signal STF
∗
CS(X19)
SD
Power running
A
Current averaging range Current averaging range Current averaging range
Less than Less than Less than
Pr.271 setting Pr.271 setting Pr.271 setting rated current rated current rated current
ON OFF
ON
Mechanical
brake
U
V
Motor
W
B
Current averaging range Current averaging range Current averaging range
Pr.272 setting Pr.272 setting Pr.272 setting rated current rated current rated current
or more or more or more
ON
ON
Regenerating
OFF
OFF ON
ON
Time
OFF