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555 to 557
Current average value monitor signal
Pr.555 Current average time
Pr.557 Current average value monitor signal output reference current
The average value of the output current during constant speed
operation and the maintenance timer value are output as a pulse
to the current average value monitor signal (Y93).
The pulse width output to the I/O module of the PLC or the like can
be used as a guideline due to abrasion of machines and
elongation of belt and for aged deterioration of devices to know the
maintenance time.
The current average value monitor signal (Y93) is output as pulse
for 20s as 1 cycle and repeatedly output during constant speed
operation.
From acceleration to constant speed operation
Output frequency
Y93 signal
1) Data output mask time
When the speed has changed to
constant from acceleration/deceleration,
Y93 signal is not output for Pr. 556 time.
2) Start pulse
Output as Hi pulse shape for 1s (fixed)
The output currents are averaged during the
time period set in Pr. 555.
3) Output current average value pulse
The averaged current value is output for 0.5 to 9s
(10 to 180%) during start pulse output.
Output current average value (A)
Signal output time =
Pr. 557 (A)
561
Refer to the section about Pr.9
563, 564
Refer to the section about Pr.52
571
Refer to the section about Pr.13
575 to 577
Refer to the section about Pr.127
611
Refer to the section about Pr.57
653
Machine resonance suppression
GP
GP
GP
V/F
V/F
V/F
MFVC
MFVC
MFVC
Pr.653 Speed smoothing control
The vibration (resonance) of the machine during motor operation
can be suppressed.
Set "100%" in Pr.653 and check the vibration. Lower the setting
gradually and adjust to the point where the vibration is minimum.
When setting parameters, refer to the instruction manual (applied) and understand instructions.
Pr.556 Data output mask time
Time
1 cycle (20s)
Next cycle
5) End pulse
Output as low pulse
shape for 1 to 16.5s
4) Maintenance timer pulse
The maintenance timer value (Pr. 503) is
output as Hi pulse shape for 2 to 9s
(16000h to 72000h)
Pr. 503 100h
Signal output time =
5s
40000h
5s
665, 882, 883, 885, 886
Regeneration avoidance function
Pr.665 Regeneration avoidance frequency gain
Pr.882 Regeneration avoidance operation selection
Pr.883 Regeneration avoidance operation level
Pr.885 Regeneration avoidance compensation frequency limit value
Pr.886 Regeneration avoidance voltage gain
This function detects a regeneration status and increases the
frequency to avoid the regeneration status.
Possible to avoid regeneration by automatically increasing the
frequency and continue operation if the fan happens to rotate faster
than the set speed due to the effect of another fan in the same duct.
Pr.
Setting
Number
Range
0 (initial
Regeneration avoidance function invalid
value)
882
1
Regeneration avoidance function valid
Regeneration avoidance function valid only
2
during constant-speed operation
Set the bus voltage level at which regeneration
avoidance operates. When the bus voltage
300 to
level is set to low, overvoltage error will be less
883
800V
apt to occur. However, the actual deceleration
time increases. The set value must be higher
than the power supply voltage
Set the limit value of frequency which rises at
0 to 30Hz
activation of regeneration avoidance function.
885
9999
Frequency limit invalid
Adjust responsiveness at activation of
regeneration avoidance. A larger setting will
886
improve responsiveness to the bus voltage
0 to 200%
change. However, the output frequency could
become unstable. When vibration is not
665
suppressed by decreasing the Pr. 886 setting, set
a smaller value in Pr. 665.
Regeneration avoidance
operation example for deceleration
Pr. 883
During regeneration
avoidance function operation
Refer to the section about Pr.117
779
Refer to the section about Pr.7
791, 792
Description
.
2
Time
Time
50
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