Power Failure Signal (Y67 Signal); Instantaneous Power Failure - Mitsubishi F700 Series Instruction Manual

Operation selection at power failure and

instantaneous power failure

Provide mechanical interlocks for MC1 and MC2. The inverter will be damaged if the power supply is input to the
inverter output section.
When automatic restart after instantaneous power failure has been selected, the motor and machine will start
suddenly (after the reset time has elapsed) after occurrence of an instantaneous power failure. Stay away from
the motor and machine. When you have selected automatic restart after instantaneous power failure function,
apply in easily visible places the CAUTION stickers supplied to the installation guideline.
Parameters referred to 
Pr. 7 Acceleration time, Pr. 21 Acceleration/deceleration time increments
Pr. 13 Starting frequency
Pr. 65, Pr. 67 to Pr. 69 Retry function
Pr. 78 Reverse rotation prevention selection
Pr. 178 to Pr. 189 (input terminal function selection)

4.12.2 Power failure signal (Y67 signal)

When output is shutoff due to a power failure or undervoltage, the Y67 signal turns ON regardless of the automatic
restart after instantaneous power failure function setting.
Y67 signal turns OFF at power failure recovery or undervoltage recovery.
To use Y67 signal, set "67 (positive logic) or 167 (negative logic)" in any of Pr. 190 to Pr. 192 (Output terminal function
selection) to assign the function.
Recovery after power failure
Power supply ON
Output frequency
Y67 OFF
CAUTION
 Changing the terminal assignment using Pr.190 to Pr.196 (Output terminal function selection) may affect the other functions. Set
parameters after confirming the function of each terminal.
Parameters referred to 
Pr. 190 to Pr. 196 (output terminal function selection)
150
Refer to page 97
Refer to page 154
Refer to page 185
Refer to page 117
OFF ON
ON OFF
Refer to page 123
CAUTION
Refer to page 94
Converter voltage recovery after E.UVT
Power supply
Output frequency
Time
Y67
ON
E.UVT occurrence
Converter voltage recovery
ON
OFF OFF
Time