Hitachi NES1-002LB, Краткое руководство пользователя

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Chapter 7 Explanation of Functions
7 - 55
7.7.2 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 ON.
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 =02, 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 data 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)
Time to wait after reset until restarting the motor
Restart frequency
threshold
b007 0.00 to 400.0 (Hz)
Restarting the motor with 0 Hz if the frequency becomes
less than the frequency set here during motor free-running.
Reset mode
selection
C102
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
Restart mode after
reset
C103
00
Start with 0 Hz
01 Start with active matching frequency (See example 3.)
(Example 1) (Example 2)
(Example 3) Restarting with active matching frequency
After the retry wait time (b003), the inverter
restarts the motor with the frequency set as
"b030". The inverter subsequently decelerates
the motor according to the setting of "b029"
while maintaining the output current at the level
specified for "b029".
When the output voltage matches the
frequency, the inverter re-accelerates the motor
up to the frequency that was set when the
inverter shut off the output to the motor before
the restart.
If the inverter trips because of overcurrent when
it restarts the motor with input frequency, reduce
the setting of "b028".
(note) Inverter starts from 0Hz when reset signal
is given during retry waiting because the
frequency stored in inverter is cleared.
RS
Alarm
RS
Alarm
Inverter
output
frequency
FW
RS
b003
b028
Motor
speed
Occurrence of trip
Output
current
Deceleration according to
the setting of "b029"
Frequency selected as the
setting of "b030"