Yaskawa MP940-MW+ - Manual (Page 7)

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 7 of 34 eng/PubNumber/MCD
Start-up
The start-up section encompasses
block 3-6, 10, and 31. It is responsible for
startup. Block 31 is executed only once
(upon power up) and can be useful for
setting user variables, or outputs that need
to be reinitialized at power up, but may be
variables themselves. Block 3 has the
condition “False” in and provides a point to
loop back the end of the flow chart, and
ensures that all blocks have connections.
The balance of the blocks regulates a
normal start up.
Block 4 must see the rising edge of
Local_Input1, this assures that input was
activated to enable system, rather than just
left on all of time. Block 5 enables the servo.
Local_Output1 and (user variable)
[SystemOk] is set in Block 6. The [System
Ok] variable is used by the two other main
programs a signal that it is Ok to execute.
The last block (10) starts the other main programs (Manual and Automatic). Lastly
Local_Output4 is set if the system had been previously homed. Only a power cycle will clear the
[Homed] bit indication.