Hitachi SJ Series, User Manual

Page: 406 / 786

12-19-9
Chapter 12 Inverter Function
12.19.7 Outputting a warning while an
undervoltage occurs
• I want to generate a warning when an
undervoltage occurs.
• Assign the output terminal function 021 [UV]
undervoltage signal to one of [CC-01] to [CC-07]
that corresponds to the output terminal and output
the signal.
• The undervoltage signal can be output when a
power failure occurs in the main power and control
power.
• You can output the signal by assigning the
undervoltage signal 021 [UV] to the output terminal
selection.
• Example of an undervoltage (R0 and T0/24V are
supplied from a separate power)
Parameter
• The undervoltage signal [UV] is output while the
control power of the inverter remains (including
when a 24-V power supply is used).
• To set errors that will be generated when an
undervoltage occurs, refer to 12.16.6
“
Generating a momentary
interruption/undervoltage trip.
”
• To perform retry restart operation without
generating errors when an undervoltage occurs,
refer to 12.13.6
“
Restarting the inverter after
recovering from an undervoltage.
”
• The [UV] signal is output under an undervoltage
state irrespective of the occurrence of a trip.
Item Parameter Data Description
Output terminal function
selection 11-15
[CC-01]~[CC-05]
021
The undervoltage signal [UV] is output.
OFF: Internal PN voltage and control power
have been established.
ON: Internal PN voltage or control power is
insufficient.
Relay output terminal function
selection 16A-16C
[CC-06]
Relay output terminal function
selection AL1-AL0/AL2-AL0
[CC-07]
Ｑ
Ａ
！
P-N voltage
R0, T0 voltage
Main power
R-S-T
[UV] output ON ON