Processing When Start Command Is Turned Off; Original Point Return Motion; Interrupt Positioning - Fuji Electric micrex-sx SPH User Manual

7-4-4 Processing when start command is turned OFF

• In the position command mode, when the start command is turned OFF, the command pulse register is reset.

7-4-5 Original point return motion

• Also in the position command mode, the phase-Z signal detect command and the processing for phase-Z signal
detection are enabled.
• When phase-Z has been detected, the deviation amount or the lower word of the current value counter at the
moment the phase-Z signal was detected is output in current value data area 2 while the phase-Z detection signal
is "1."
Points of use:
· In the position command mode, positioning is performed referencing the position data sent from the CPU
module.
· Therefore, on the CPU module side, the processing for original-point return is performed referencing the
increase in command position since the rising edge of the start signal and the value of current value counter
when phase-Z was detected.
(For a pulse train command-type servo system)
Total increase of command position since the rising edge of the start signal: Psv
Total increase of feedback pulse until phase-Z was detected since the rising edge of the start signal: Ppv
Even when the command position has been held since the timing when the total increase of command position
was Ppv, the motor rotates by (Psv-Ppv) from the time point when phase-Z was detected (when deviation
became zero).
· When the shift length is set to "Po," the point which is added (Po-(Psv-Ppv)) to the command position becomes
the original point.
When the total increase of command position since the rising edge of the start signal becomes (Po+Ppv),
holding the command position data completes the positioning at machine origin.

7-4-6 Interrupt positioning

• Also in the position command mode, the interrupt position detect command and processing for interrupt signal
detection are enabled.
• When the interrupt signal has been detected, the deviation amount or the lower word of the current value counter
at the moment the interrupt signal was detected is output in current value data area 2 while the interrupt detection
signal is "1."
Points of use:
· In the position command mode, as in original-point return motion, the processing for the interrupt positioning can
be executed from the CPU module.
(For a pulse train command-type servo system)
(1) Total increase of the command position since the rising edge of the start signal: Psv
(2) Total increase of the feedback pulse since the rising edge of the start signal until interrupt was detected: Ppv
Even when the command position has been held since the timing when the total increase of command position
was Ppv, the motor rotates by (Psv-Ppv) from the time point when the interrupt signal was detected (when
deviation became zero).
When shift length is set to "Po," the point which is added (Po-(Psv-Ppv)) to command position becomes the t
arget position forthe interrupt positioning.
That is to say, when the total increase of command position since the rising edge of the start signal becomes
(Po+Ppv), holding the command position data completes the positioning at the target point for interrupt
positioning.
7-4 Functions of the Position Command Mode
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