Mitsubishi Electric FR-A700 Series, Техническое руководство

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70
SPECIFICATIONS
1.4.19 Detection of output frequency (SU, FU, FU2
*
, FU3
*
, FB
*
, FB2
*
, FB3
*
, LS
*
)
(common)
(1) Up-to-frequency sensitivity (SU)
When the output frequency reaches the running
frequency, the up-to-frequency signal (SU) is output.
The [
Pr. 41 ] value can be adjusted within the range
1% to 100% on the assumption that the set
frequency is 100%.
This parameter can be used to ensure that the
running frequency has been reached to provide the
operation start signal etc. for related equipment.
(2) Low speed detection (LS)
The low speed detection signal (LS) is output when
the output frequency decreases below the [
Pr. 865 ]
setting.
When speed control is performed by Real sensorless
vector control or vector control, a fault (E.OLT) is
displayed and the inverter output is stopped if
frequency drops to the [
Pr. 865
] setting by torque limit
operation and the output torque exceeds [ Pr. 874 OLT
level setting ] and remains for more than 3s.
For the LS signal, set 34 (positive logic) or 134
(negative logic) in [
Pr. 190 to Pr. 196 Output terminal
function selection ] and assign functions to the output
terminal.
*1 The output frequency to be compared with the set
frequency at the SU signal and LS signal differs
according to the control method.
(*FU3, FB, FB2, FB3, LS are not available for .)
(*FU2, FU3, FB, FB2, FB3, LS are not available for .)
[Pr. ] Name
Initial
Value Setting
Range
Description
Available Inverters
41 Up-to-frequency sensitivity 10% 0 to 100% Set the level where the SU signal turns ON.
42 Output frequency detection 6Hz 0 to 400Hz
Set the frequency where the FU (FB) signal
turns ON.
43
Output frequency detection
for reverse rotation
9999
0 to 400Hz
Set the frequency where the FU (FB) signal
turns ON in reverse rotation.
9999 Same as [
Pr. 42
] setting
50
Second output frequency
detection
30Hz 0 to 400Hz
Set the frequency where the FU2 (FB2) signal
turns ON.
— 116
Third output frequency
detection
60Hz 0 to 400Hz
Set the frequency where the FU3 (FB3) signal
turns ON.
—
865 Low speed detection 1.5Hz 0 to 400Hz
Set the frequency where the LS signal turns
ON.
common
F700
E700 D700
A700 F700
E700
D700
common
Output frequency (Hz)
ON
Set frequency Adjustment
range [
Pr.41 ]
SU
Time
OFF
OFF
A700
Control Method
Compared Output
Frequency
V/F control
Output frequency
Simple magnetic flux vector control
,
Advanced magnetic flux vector control
Output frequency before slip
compensation
Real sensorless vector control
Frequency (actual motor
speed) estimated value
Encoder feedback control
or vector control
Value of actual motor rotation
represented in terms of
frequency setting
ON LS ON OFF
[ Pr.865 ]
Output frequency (Hz)
Time
common
F700
A700
A700
A700
A700