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Chapter 4
Timing chart for switching from the inverter to the
commercial power supply
MC1
ON
MC2
MC3
ON
ON
FW
CS
ON
Inverter output
Operation
frequency
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.
Function
Item
Retry wait time
b003
before motor restart
Restart frequency
b007
threshold
Reset mode selection
C102
Restart mode after
C103
reset
ON
Data or range of
code
data
0.3 to 100. (s)
0.00 to 400.0 (Hz)
00
01
02
03
00
01
02
Explanation of Functions
Timing chart for switching from the commercial power supply
MC1
MC2
MC3
FW
CS
Inverter output
0.5 to 1 second
frequency
Starting with matching frequency
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
Description
(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
(See the explanations of the retry after instantaneous power
failure or the retry after trip due to insufficient voltage.)
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
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
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
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
Start with 0 Hz
Start with matching frequency (See Example 3.)
Restart with input frequency (See Example 4.)
4-54
to the inverter
ON
Duration of the interlock of MC2 and
MC3 (0.5 to 1 second)
ON
ON
OFF
Retry wait time (b003)
Operation
Related code
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