Yaskawa MP940-MW+ - Manual (Page 18)

TECHNICAL NOTE
MOTION PRODUCT AND ENGINEERING GROUP
Yaskawa Electric America - 2121 Norman Drive South – Waukegan IL 60085
(800) YASKAWA - Fax (847) 887-7280
5/22/2003 18 of 34 eng/PubNumber/MCD
block (5) has modified to be more suitable for the Latch routine. It has been configured to
activate output during the various states of latching as described in the graphic above. Lastly,
the logic in blocks (9 & 10) cause Output 7 to activate if a latch is detected during the move. This
can very helpful when troubleshooting using the Scope functionality of MotionWorks+.
Latch Target Block
The latch target block is a
pre-configured block that allows the
user to make use of the high speed
(captures position in 30
microseconds or less) without
knowing the ins and outs
arming/disarming/windowing the
latch signal. The block is much like
a move block; in fact if a latch is not
received it will work identically to a
move axis block (Default Distance in
Latch Target block = Position in
move block). However, if a Latch
signal is received then the servo will
move the Distance After Latch from
the point where the latch was
detected.
Occasionally false latches
can be a problem and cause the
servo to move an incorrect distance.
The Latch Start and Finish Distance
parameters are useful in removing unwanted latch signals. They are used to set-up a window in
which the latch is expected.
Configuration
The Configuration folder contains: System
Parameters and System Properties configuration.