Chapter 5 Function parameter
96
Ch
ap
ter 5
Zero current
detection level
F7.32
Time/t
Output current
Zero current detection delay time F7.33
Time/t
Zero current
detection signal
ON
Figure 5-25:Schematic diagram of zero current detection
When the inverter's output current is less than or equal to zero current detection level and
lasts for longer than the delay time of zero-current detection, the inverter's multifunction DO will
output ON signal. The figure is the schematic diagram of zero current detection.
F7.34
Overrun value of output
current
0.0% (not detected)
0.1%~300.0%(rated motor current)
200.0%
☆
F7.35
Output Current overrun
detection delay time
0.01s~360.00s
0.00s
☆
Overrun value of
output current
F7.34
Time(t)
Output current
Output current overrun detection delay time F7.35
Output current
overrun detection
signal
ON
Time(t)
Figure 5-26:Schematic diagram of output current overrun detection signal
When the inverter's output current is more than or overrun the detection point and lasts for
longer than the delay time of software overcurrent point detection, the inverter's multifunction DO
will output ON signal.
F7.36 Random arrivals current 1
0.0%~300.0%(rated motor current)
-100.0%
☆
F7.37
Random arrivals current 1
width
0.0%~300.0%(rated motor current)
0.0%
☆
F7.38 Random arrivals current 2
0.0%~300.0%(rated motor current)
-100.0%
☆
F7.39
Random arrivals current 2
width
0.0%~300.0%(rated motor current)
0.0%
☆
When the inverter's output current randomly reaches the range of the current detection
width(positive or negative), the inverter multifunction DO will output ON signal.
ST500 provides two group of sets of parameter for Randomly Reaches Current and Detection
Width, the figure is the functional diagram.
