Yaskawa MP2000 - Manual (Page 106)

TECHNICAL NOTE
SERVO ENABLE POWER function
Function block for MP2000 series
<SVON> Function Block Summary
This function block controls the power stage (on or off) of the axis as well as monitoring and updating the
RDA with Actual Position, Actual Velocity, Actual acceleration, Actual deceleration and Actual S-curve.
This block is essential if any of the Blocks that control motion to be used. This block also enables the
user to limit the direction the axis can go..
Function Block Diagram
<SVON> Function Block Operation Notes
• This block must be used in the High Speed Scan drawings, and should be the
first block executed before any other motion function blocks.
• Interlock parameters used inside SVON block, the servo will not enable until all of
the following conditions are clear:
o
SVCRDY (IB**000):Motion Controller SVB/SVA Module Run Ready. This
is high when the run preparation for motion module have been completed.
This is low when major fault occurred, axis set to not used, motion fixed
parameter setting error or has changed, in asynchronous communication
state and MPE720 are accessing the servo amplifier parameter and the
motion parameter screen is opened by MPE720.
o
ALM (IB**2C0):Servo Axis alarm bit (high state indicates alarm occurred)
o
PON (IB**2C4):Servo amplifier main power ON. This is high when the
main circuit power of the servo amplifier is on.
o
HS-1SEC (SB000018): H-Scan delay-on service register (off for one
second after first H-Scan executes when control power is applied. After
one second it is always on).
• Upon Rising edge of ENABLE, the following two events will occur. ENABLE
input must remain high to maintain servo enable.
File: MP2000_IndividualFunctionDocument_RevC 106/168
Doc Number: eng.MCD.05.101
11/17/2005