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Function assignment of external
terminal and control
Pr. 167 = 0 or 1
Output
current
Pr.152
Pr.152
0[A]
OFF
ON
Start signal
OFF
Zero current
detection time
Pr. 153
(Y13)
Detection time
* Once turned on, the zero current detection time
signal (Y13) is held on for at least 0.1s.
CAUTION
The response time of Y12 and Y13 signals is approximately 0.1s. Note that the response time changes according to the load
condition.
When Pr. 152 = "0", detection is disabled.
Changing the terminal assignment using Pr. 190 to Pr. 196 (output terminal function selection) may affect the other functions.
Please make setting after confirming the function of each terminal.
The zero current detection level setting should not be too high, and the zero current detection time setting not
too long. Otherwise, the detection signal may not be output when torque is not generated at a low output
current.
To prevent the machine and equipment from resulting in hazardous conditions by use of the zero current
detection signal, install a safety backup such as an emergency brake.
Parameters referred to
Pr. 190 to Pr. 196 (output terminal function selection)
122
(2) Zero current detection (Y13 signal, Pr. 152, Pr.
0.1s
Time
*
OFF
ON
ON
Pr. 153
Detection time
CAUTION
Refer to page 116
153, Pr. 167)
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 from
the inverter's open collector or relay output terminal.
When the inverter's output current falls to "0", torque will not
be generated. This may cause a drop due to gravity when
the inverter is used in vertical lift application. To prevent this,
the output current zero signal (Y13) can be output from the
inverter to close the mechanical brake when the output
current has fallen to "0".
When Pr.167 = "10" or "11", turning Y13 signal ON stops the
inverter output and causes output current detection fault
(E.CDO) to be displayed. ON status of Y13 signal is held for
0.1s at the fault. Setting Pr. 167 = "10" or "11" while Y13
signal is ON does not cause E.CDO. Setting to Pr. 167
becomes effective after Y13 is turned OFF.
For the Y13 signal, set "13 (positive logic)" or "113 (negative
logic)" in any of Pr. 190 to Pr. 196 (output terminal function
selection) to assign the function to the output terminal.

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