Mitsubishi Electric FR-A800, Instruction Manual

Page: 351 / 1042

Parameters Position control under vector control and PM sensorless vector control
FR-A800 5 - 171
Selecting the pulse train type (Pr. 428 and NP signal)
●
Set Pr. 419 "Position command source selection" = "2" (simple pulse train position command).
●
Set "68" in any of Pr. 178 to Pr. 189 (selection of the input terminal function) to assign Simple
position pulse train sign (NP).
●
Select the command pulse train with Pr. 428 "Command pulse selection".
●
Select vector control or PM sensorless vector control to select the position control method.
Clear signal selection (Pr. 429, CLR signal)
●
This function is useful to reset the number of droop pulses to 0 when home position return is
performed.
●
If the simple position droop pulse clear (CLR) signal is turned ON when Pr. 429 "Clear signal
selection" (clear signal selection) = "0", the deviation counter is cleared at the edge of the signal.
The Simple position droop pulse clear CLR 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.
Pr. 428 setting Command pulse train type During forward rotation During reverse rotation
0 to 2
Negative
logic
Pulse train + rotation
direction sign
3 to 5
Positive
logic
Pulse train + rotation
direction sign
Tab. 5-61: Setting of parameter 428
NOTE If Pr. 419 = "2" (simple pulse train position command) is set, the terminal JOG is used for the simple
position pulse train input regardless of the Pr. 291 "Pulse train I/O selection" pulse train input/out-
put selection setting.
I001541E
Fig. 5-69: Clear the droop pulse
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 (input terminal function selection) => page 5-422
L H
JOG
NP
JOG
NP
H
L
ON
When Pr. 429 = 0
Deviation counter
image
When Pr. 429 = 1 (initial value)
Deviation counter
image
ON
CLR
CLR
Counter clear at the edge of
turning on of the signal
Counter clear while ON