Siemens SIMATIC FM 453, Руководство пользователя

Страница: 283 / 380

9-83
FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01
S
Stepper motor rotation without a specified setpoint value likewise triggers
a “Rotation monitoring” error in response to the NIX edges caused by the
unwanted rotation. This occurs whenever the preceding target position
falls within the range outside the allowable window for the NIX edges. If
an unwanted rotation occurs outside the allowable window, there is no
way of identifying whether oscillation on a NIX edge position caused by
malfunction generated the error, or whether complete motor revolutions
are involved.
S
Rotation monitoring is automatically discontinued whenever the synchro-
nization mark is passed over in the “Reference point approach” operating
mode, and the function “Retrigger reference point approach” is executed.
X
–45
°
+45
°
B
A
NIX
NIX – Zero pulse external
– (NIX center is synchronization point for rotation monitoring)
X – Permissible range for NIX
A – Following error trigger point on ro (after 1 rev. + 45
°
)
B – Following error trigger point on rotation – (after 1 rev. + 45
°
)
Fig. 9-12 Allowable Range Relative Position for the External Pulse
Backlash compensation
(see “Backlash compensation” in Section 9.7.2)
Correction
Functions
Description of Functions