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Chapter 4 Explanation of Functions
4 - 54
4.2.49 Reset (RS) function
The reset function allows you to recover the inverter from a tripped
state.
To perform resetting, press the STOP/RESET key of the digital
operator or turn the RS terminal off.
To use the control circuit terminal for resetting, assign function "18"
(RS) to an intelligent input terminal.
You can select the restart mode to apply after resetting with the restart mode after reset (C103). When
C102 =03, starting with 0 Hz is selected regardless to C103 setting.
If the inverter trips because of overcurrent when it starts the motor with matching frequency, increase the
retry wait time before motor restart (b003).
You can select the alarm reset timing with the reset mode selection (C102). You can also enable the reset
signal to be output only when resetting an error alarm.
The RS terminal can be configured only as an a-contact (NO).
Do not use the RS terminal for the purpose of shutting off the inverter output. The reset operation clears
the electronic thermal and BRD counter data stored in the inverter, and, without this data, the inverter may
be damaged during operation.
Item
Function
code
Data or range of
data
Description
Retry wait time
before motor restart
b003 0.3 to 100. (s)
(See the explanations of the retry after instantaneous power
failure or the retry after trip due to insufficient voltage.)
Time to wait after reset until restarting the motor
Restart frequency
threshold
b007 0.00 to 400.0 (Hz)
(See the explanations of the retry after instantaneous power
failure or the retry after trip due to insufficient voltage.)
00
Resetting the trip when the RS signal is turned on (See
example 1.)
(When operation is normal) Shutting off the inverter output
(When an error has occurred) Resetting the trip
01
Resetting the trip when the RS signal is turned off (See
example 2.)
(When operation is normal) Shutting off the inverter output
(When an error has occurred) Resetting the trip
02
Resetting the trip when the RS signal is turned on (See
example 1.)
(When operation is normal) Disabling the inverter output
(When an error has occurred) Resetting the trip
Reset mode
selection
C102
03
Trip is reset (See example 1)
Internal data is not reset. (see 4.3.13)
(When operation is normal) Disabling the inverter output
(When an error has occurred) Resetting the trip
00
Start with 0 Hz
01
Start with matching frequency (See example 3.)
Restart mode after
reset
C103
02
Restart with input frequency (See example 4.)
ON
ON
MC1
MC2
MC3
FW
CS ON
ON
ON
MC1
MC2
MC3
FW
CS
ON
ON
ON OFF
Timing chart for switching from the inverter to the
commercial power supply
Timing chart for switching from the commercial power
supply to the inverter
Inverter output
frequency
Operation
Duration of the interlock of MC2 and
MC3 (0.5 to 1 second)
0.5 to 1 second
Inverter output
frequency
Retry wait time (b003)
Starting with matching frequency
Operation
b003: Retry wait time before motor restart
b007: Restart frequency threshold
C102: Reset mode selection
C103: Restart mode after reset
C001 to C008: Terminal [1] to [8] functions
Related code