Mitsubishi Electric F700 Instruction Manual page 121

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 100ms.
CAUTION
⋅ When terminal assignment is changed using Pr. 190 to Pr. 196 (output terminal function selection), the other functions may be
affected. 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)
(2) Zero current detection (Y13 signal, Pr. 152, Pr.
⋅ If the output current remains lower than the Pr. 152 setting
100ms
Time
*
⋅ When the inverter's output current falls to "0", torque will not
OFF
ON ON
Pr. 153
Detection time
⋅ For the Y13 signal, set "13 (positive logic)" or "113 (negative
CAUTION
Refer to page 107
Function assignment of external
153)
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.
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 "zero".
logic)" in any of Pr. 190 to Pr. 196 (output terminal function
selection) to assign functions to the output terminal.
terminal and control
113
4