Hitachi SJ Series, User Manual

Page: 355 / 786

12-16-6
Chapter 12 Inverter Function
12.16.6 Making the inverter trip after an
instantaneous power
failure/under-voltage
• How to make the inverter trip when the power
supply voltage of the inverter has dropped
• How to stop the inverter with an error signal when
an instantaneous power failure has occurred
Parameters related to instantaneous power failure
and under-voltage
• When direct current (P-N) is supplied to control
power supply terminal R0 and T0, the inverter
may detect under-voltage at power interruption
and then trip. If there is any problem with your
system, set [bb-27] to 00 or 02.
•
Even if Selection of instantaneous power failure
trip [bb-20] is set to other than 0 and Selection of
instantaneous power failure/under-voltage trip
during stopping [bb-27] is set to "Disabled" (00 or
02), [E016] Instantaneous power failure error will
occur when the actual power failure time exceeds
the allowable instantaneous power failure time.
• When selecting a retry function, see "12.3 Using
Trip Avoidance Function".
• When the control circuit power supply is turn off
and the power is lost, the operation mode will be
the same as the mode at power-on. For
subsequent operations, see the explanation about
the restart after reset.
•
Even during a retry operation, the retry will be
interrupted if the instantaneous power
failure/under-voltage condition continues for about
40 seconds, and error code [E009] Under-voltage
or [E016] Instantaneous power failure will be
displayed.
•
When connecting separate power supplies to
control power supply terminals (R0 and T0), and if
an instantaneous power failure occurs at the main
power supply terminals (R, S, and T), it will take
about 1 second of the detection time before an
instantaneous power failure error and
under-voltage error occur. When braking is
performed by [AL] alarm signal (output terminal
function 017), the braking response will be slow,
and therefore use the brake control function.
Item Instantaneous power failure Under-voltage
• Always making the inverter trip when an
instantaneous power failure/under-voltage occurs
Set [bb-20] to 0.
[E016] Instantaneous power
failure error
Set [bb-21] to 0.
[E009] Under-voltage error
• Always making the inverter retry when an
instantaneous power failure/under-voltage occurs
Set [bb-20] to 255. Set [bb-21] to 255.
• Making the inverter trip after the specified number
of retries are made after an instantaneous power
failure/under-voltage has occurred
Set [b-20] to other than 0 or
255.
[E016] Instantaneous power
failure error
Set [b-21] to other than 0 or
255.
[E009] Under-voltage error
• Outputting the state to an output terminal
Assigns 020 [IP] Instantaneous
power failure signal. Assigns 021 [UV]
Under-voltage signal.
• Selecting whether to make the inverter trip when
an instantaneous power failure or under-voltage
occurs while the inverter is in a stopped state.
Sets [bb-27].
Q
A
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