Omron RX Series User Manual page 442

7 Detailed Functions
Precautions for Correct Use Precautions for Correct Use
The reset function clears calculated electronic thermal function data, calculated regenerative
braking usage rate data, and other data. Therefore, if the reset function is often used, the motor
overload protection and braking resistor overheat protection cannot be performed properly. If you
need to execute the reset function more than once, provide a few minutes of interval between
each execution. To shut off the inverter output, use the free-run stop function, instead of the reset
function.
(Example 1)Trip reset at power-on
(C102 = 00, 02, 03)
RS
Alarm
(Example 3) Frequency matching restart
Setting Reset Restart Selection (C103) to 01 (Frequency matching restart) causes the inverter to
perform frequency matching restart also after the power supply is turned off and then on again. Also,
when it is set to 00 (0-Hz restart), the Restart Standby Time (b003) will be ignored. However, even
when the Free-run Stop Selection is set to 01 (Frequency matching start), the inverter may restart at
0 Hz in the following cases.
The output frequency is equal to or lower than 1/2 of the base frequency.
The motor induction voltage decreases quickly.
The inverter recognizes that the detected frequency is equal to or less than the value set in the
Frequency Matching Lower Limit Frequency (b007).
Power supply
(Example 4) Frequency pull-in restart
When the set Restart Standby Time (b003) elapses, the inverter starts to output at the frequency set
in the Starting Frequency Selection at Frequency Pull-in Restart (b030).
Then, the inverter decelerates the motor according to the Frequency Pull-in Restart Parameter
(b029) setting, while suppressing the output current to the value set in the Frequency Pull-in Restart
Level (b028).
When the current decreases to or below the Frequency Pull-in Restart Level (b028), the inverter
accelerates the motor again to return to the original frequency.
If this method causes an overcurrent trip, decrease the value set in the Frequency Pull-in Restart
Level (b028).
7 - 116
FW
Motor rpm
High-function General-purpose Inverter 3G3RX-V1 User's Manual (I578-E1)
(Example 2)Trip reset at power-off
(C102 = 01)
RS
Alarm
Frequency matching
Free running