4-85
4-2 Function Mode
4
Functions
Reset
•This function resets an Inverter trip.
•To reset an Inverter trip, press the STOP/RESET key on the Digital Operator, or switch the RS
terminal from ON to OFF.
•To reset via the control circuit terminal block, allocate 18 (RS) to the desired multi-function input.
•With reset frequency matching selection C103, you can select how to restart the Inverter after
reset, a frequency matching or 0-Hz start. If an overcurrent trip occurs at frequency matching start,
increase the retry wait time (b003).
•You can select an alarm reset timing in reset selection C102. In addition, you can enable the reset
signal only for alarm resetting during error.
•For the RS terminal, only NO contact is available.
Note: Do not use the reset terminal to shut off the Inverter output. Reset operation clears the
internal data (e.g. electronic thermal BRD counter), causing damage to the Inverter.
(Example 1) (Example 2)
(Example 3) If "01" (frequency matching start) is selected in reset frequency matching selection C103, frequency
matching start is also enabled when the power is turned on again. When C103 = 00 (0-Hz start), the
retry wait time (b003) is ignored. Even if "frequency matching start" is selected, however, the
Inverter may start at 0 Hz if:
• The output frequency is equal to or lower than 1/2 of the base frequency
• The motor induction voltage quickly attenuates
Parameter No. Function name Data Default setting Unit
b003 Retry wait time
0.3 to 100.:
(Refer to "Momentary Power Interruption/
Trip Retry (Restart)" (page 4-42).)
Time from reset to restart
1.0 s
b007
Frequency matching
lower limit frequency
setting
0.00 to 400.0:
(Refer to "Momentary Power Interruption/
Trip Retry (Restart)" (page 4-42).)
0.00 Hz
C102 Reset selection
00: Trip reset at power-on (example 1)
Normal: Output shut off
Abnormal: Trip reset
00
01: Trip reset at power-off (example 2)
Normal: Output shut off
Abnormal: Trip reset
02: Trip reset at power-on (example 1)
Normal: Disabled
Abnormal: Trip reset
03: Trip reset only (example 1)
The Inverter does not initialize internal
data at trip reset.
Normal: Disabled
Abnormal: Trip reset
C103
Reset frequency
matching selection
00: 0-Hz start
01: Frequency matching start (example 3)
02: Active Frequency Matching restart
00
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