Mitsubishi Electric FR-A820-00046 Instruction Manual page 381

Parameters
Clear signal selection (Pr. 429, CLR signal, CLRN signal)
● This function is useful to reset the number of droop pulses to 0 when home position return is
performed.
● Simple position droop pulse clear (CLR) signal is valid when the inverter is in the External operation
mode, and the NET position pulse clear (CLRN) signal is valid when the inverter is in the Network
operation mode (except when the FR-A8NS is installed).
● If the simple position droop pulse clear (CLR/CLRN) signal is turned ON when Pr. 429 "Clear signal
selection" = "0", the deviation counter is cleared at the edge of the signal. The simple position
droop pulse clear CLR/CLRN signal is also turned ON in synchronization with the zero pulse signal
of the encoder such as the home position return signal, and the deviation counter is cleared.
● For a terminal used for the CLR signal, set "69" in any of Pr. 178 to Pr. 189 (input terminal function
selection) to assign the function.
● For a terminal used for the CLRN signal, set "59" in any of Pr. 178 to Pr. 189 (input terminal function
selection) to assign the function.
Deviation counter
Fig. 5-70:
NOTES The accumulated number of pulses is cleared at base shutoff or when the CLR signal is turned ON.
Changing the terminal assignment using Pr.178 to Pr.189 (input terminal function selection) may
affect the other functions. Set parameters after confirming the function of each terminal.
Parameters referred to
Pr. 178 to Pr. 189
FR-A800
Position control under vector control and PM sensorless vector control
When Pr. 429 = 0
image
CLR
(CLRN)
Counter clear at the edge of
turning on of the signal
Clear the droop pulse
(input terminal function selection)
Deviation counter
image
ON
CLR
(CLRN)
When Pr. 429 = 1 (initial value)
ON
Counter clear while ON
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