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PARAMETERS
114
Pr. 192 "A, B, C terminal
function (ABC) selection"
Related parameters
"
" Zero current detection (Pr. 152, Pr. 153)
4.2.32 Zero current detection (Pr. 152, Pr. 153)
Pr. 152 "zero current detection level"
Pr. 153 "zero current detection period"
When the inverter's output current falls to "0", torque will not be generated. This may
cause a gravity drop when the inverter is used in vertical lift application.
To prevent this, the output current "zero" signal can be output from the inverter to close
the mechanical brake when the output current has fallen to "zero".
!
If the output current remains lower than the Pr. 152 setting during inverter operation
for longer than the time set in Pr. 153, the zero current detection (Y13) signal is
output.
(Use Pr. 192 to assign the terminal used for Y13 signal output.)
Parameter
Number
Factory
Setting
Setting
Range
152 5.0% 0 to 200.0%
153 0.5 s 0.05 to 1 s
OFF ON
Start signal
Pr. 152 "zero current
detection level"
OFF
ON
Zero current
detection signal
output (Y13)
Pr.152
OFF
ON
(Note)
Output current 0 [A]
100ms
Pr. 153 "detection time"Pr. 153 "detection time"
<Setting>
Refer to the following list and set the parameters:
Parameter
Number
Description
152
Set the zero current detection level.
Set this parameter to define the percentage of the rated current at which the
zero current will be detected.
153
Set the zero current detection time.
Set a period of time from when the output current falls to or below the
Pr. 152 setting to when the zero current detection signal (Y13) is output.
Note:1. If the current falls below the preset detection level but the timing condition is
not satisfied, the zero current detection signal is held on for about 100ms.
2. This function is also valid during execution of offline auto tuning.
3. When the terminal functions are changed using Pr. 192, the other functions
may be affected. Confirm the functions of the corresponding terminals before
making settings.
4