Mitsubishi Electric FR-D720S SC EC, Инструкция по эксплуатации

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Parameter Special operation
FR-D700 SC EC 6 - 267
6.19.4 Regeneration avoidance function (Pr. 665, Pr. 882, Pr. 883, Pr. 885, Pr. 886)
This function detects a regeneration status and increases the frequency to avoid the regener-
ation status.
Possible to avoid regeneration by automatically increasing the frequency and continue opera-
tion if the fan happens to rotate faster than the set speed due to the effect of another fan in the
same duct.
The above parameters can be set when Pr. 160 = 0.
Pr. No. Name
Initial
Value
Setting
Range
Description Parameters referred to
Refer to
Section
882
Regeneration
avoidance operation
selection
0
0
Regeneration avoidance function
invalid
1
8
22
Maximum
frequency
Deceleration time
Stall prevention
operation level 6.3.1
6.6.1
6.2.4
1
Regeneration avoidance function is
always valid
2
Regeneration avoidance function is
valid only during a constant speed
operation
883
Regeneration
avoidance operation
level
200V
class
400V DC
300–800V
Set the bus voltage level at which
regeneration avoidance operates.
When the bus voltage level is set to
low, over voltage error will be less apt
to occur. However, the actual decelera-
tion time increases. The set value
must be higher than the power supply
voltage ×
√
2.
400V
class
780V DC
885
Regeneration
avoidance
compensation
frequency limit value
6Hz
0–10Hz
Set the limit value of frequency which
rises at activation of regeneration
avoidance function.
9999 Frequency limit invalid
886
Regeneration
avoidance voltage
gain
100% 0–200%
Responsiveness at activation of regen-
eration avoidance.
A larger setting will improve respon-
siveness to the bus voltage change.
However, the output frequency could
become unstable. When vibration is
not suppressed by decreasing the
Pr. 886 setting, set a smaller value in
Pr. 665.
665
Regeneration avoid-
ance frequency gain
100% 0–200%