Mitsubishi Electric FR-V560 Instruction Manual page 124

<Setting>
Refer to the above figures and following table to set the corresponding parameters.
Parameter
Setting
Number
0 0.1s coasting time
Waiting time for inverter-triggered restart after power is restored from an instantaneous power failure.
(Set this time between 0.1s and 5s according to the inertia moment (J) and torque magnitude.)
57 0.1 to 5s
9999 Without restart
With speed search
0
Speed search is made after detection of an instantaneous power failure.
Without speed search
Independently of the motor coasting speed, the output voltage is gradually increased with the speed
kept as preset, i.e. a reduced voltage starting system.
162 1
Speed search is made on startup. The motor starts running at the speed detected by the encoder
10
under vector control with encoder.
58 0 to 60s
Normally the motor may be run with the factory settings, but restart or voltage cushion time are
163 0 to 20s
adjustable according to the load (inertia moment, torque) magnitude using Pr. 58, Pr. 163, or Pr. 164.
Also the output frequency is reduced when the current flow exceeds the Pr. 165 setting.
164 0 to 100%
Invalid for vector control with encoder.
165 0 to 200%
(1) To make automatic restart after instantaneous power failure valid.
Restart function after instantaneous power failure is made valid by setting a value other than "9999" in Pr. 57
"restart coasting time".
Time set in this Pr. 57 is the control start waiting time from power restoration to automatic restart.
(2) Selection of whether speed search is used or not (Pr. 162 "automatic restart after instantaneous power failure
selection")
Smooth start at power restoration is available as required only during vector control without encoder and V/F control.
CAUTION
1. When Pr. 162 = "0" under V/F control, DC injection brake is applied for a moment at speed
detection. Therefore speed may decrease if the inertia is small.
2. To start during coasting under vector control without encoder, set "10" (speed search initiated
per start) in Pr. 162.
CAUTION
1. With speed search (Pr. 162= "0") under vector control without encoder or V/F control.
•When the inverter capacity is two rank or more larger than the motor capacity when Pr. 162="0" (with
speed search), the inverter may not start due to overcurrent (OCT) alarm.
•Searchable speed is 3000r/min or less.
•Speed is regarded as 0r/min when the search speed is 150r/min or less.
2. The restart coasting time in Pr. 57 does not include the speed search time (300ms maximum).
There is no delay time due to speed search when speed search is not made or vector control is
exercised. (excluding the inverter starting time)
3. If two or more motors are connected to one inverter, the inverter functions abnormally. (The inverter
does not start smoothly.)
4. When restart operation is selected, UVT and IPF among the alarm output signals are not output at
occurrence of an instantaneous power failure.
5. The SU and FU signals are not output during restart but are output after the restart cushion time has elapsed.
When automatic restart after instantaneous power failure has been selected, the motor and machine
will start suddenly (after the restart coasting 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, apply the supplied
CAUTION seals, provided for the Instruction Manual (basic), in easily visible places.
The motor coasts to a stop as soon as the start signal is turned off or
automatic restart cushion time.
Related parameters
• Setting of alarm output signal for executing automatic restart after instantaneous power failure ⇒ Pr. 65 "retry selection" (Refer to page 121.)
REMARKS
• Recommended settings for Pr. 57 during vector control without encoder and V/F control are
1.0s for 2.2 to 7.5K, 3.0s for 15K or more.
• The setting value does not include resetting time of the inverter.
REMARKS
Increase output voltage instantly under vector control without encoder.
CAUTION
Automatic restart (Pr. 57, Pr. 58)
Description
This setting may be used without problem during vector control.
115
STOP
is pressed during
RESET
4