Positioning Operation - Fuji Electric micrex-sx SPH User Manual

7-3 Functions of Pulse Generation Mode
Points of use:
· To use the original point return function with OT in the returning direction or in the reverse direction, or to use
the preset function which makes the current position the machine origin, it is necessary to adapt to these
functions by the application on the CPU module side.
· If only shift length is specified for returning to the original point by the servo system, displacement may occur
depending on the deviation amount of the deviation counter on the servo amplifier side.
Referencing the deviation amount when phase-Z was detected from this module (NP1F-MP1/MP2), execute
original point return according to the procedure shown below:
1) Set the number of pulses which is half the shift length to the original point in the command pulse register
and then start this function.
2) When phase-Z is detected, add the following value to the command pulse register.
The value to be added = (Set value of shift length)/2 - (Deviation amount)
3) When the deviation amount is greater than 1/2 of the set value of the shift length, even if the value to be
added is set to "0," an overrun occurs, passing the target position when stopped.
(In such cases, decrease the creep speed.)

7-3-13 Positioning operation

• Write the necessary data in each register and then set the start command to "1."
Current frequency
register
Start command
(PC = = > MP1/MP2)
Positioning end
(PC < = = MP1/MP2)
Command pulse zero
(PC < = = MP1/MP2)
Acceleration/deceleration register : Controls the acceleration/deceleration time (acceleration).
Target frequency register
Base frequency register
Current frequency register
Speed multiplication register
Command pulse register
Deceleration point register
Command pulse zero
Target frequency register
Speed multiplication register
Command pulse register
Acceleration/
deceleration
register
"1"
"1"
: Controls the pulse output frequency.
: Controls the automatic-start frequency.
: Controls the measured value of command frequency.
: Controls the maximum frequency.
: Controls the number of pulses which are output from the pulse generator.
Remaining pulses are stored in this register.
: Controls the deceleration starting point.
: Becomes "1" when the number of pulses remaining in the command pulse
register is "0."
Deceleration point register
Acceleration/
deceleration
register
7-18
Base frequency register
Speed multiplication register
Time
"1"
"1"