Yaskawa A1000 AC Drive Spindle Orientation - Manual (Page 27)

2 Spindle Orientation
YASKAWA TM.A1000SW.063 Spindle Orientation A1000 Custom Software Supplement 27
When power to the drive is reset, this monitor is reset to 0. Since the orientation of the spindle is unknown while the drive
is without power, upon power up the monitor alternates “Dist from Offset” / “Looking for C/Z” until the drive finds the
first marker pulse. Once the marker pulse is found, the monitor is reset to 0 once again, and the “Looking for C/Z”
message clears.
When the drive exceeds the S2-01 Control Mode Switch Frequency (S2-11 if Motor 2 is selected), the encoder PPR may
exceed the input frequency limit of the PG-X3/PG-B3 Encoder (PG) Feedback Card. Therefore, this monitor ceases to
update when the frequency reference is above S2-01. The monitor alternates the text “Dist from Offset” / “PG Freq Limit”
until the drive frequency is less than S2-01 and the marker pulse is located.
U7-04: Commanded Offset
This monitor displays the current marker offset position. Each time an orient is commanded, this monitor is updated with
the value of the current marker offset.
If Marker Offset Selection parameter P2-01=0, the drive is in Digital Input Select mode, and monitor U7-04 is updated
with the offset count corresponding to the current state of the digital input(s) at the time when a valid orient digital input
is activated. Refer to
Orient Position Offset Selection on page 25 for the digital input states.
If Marker Offset Selection parameter P2-01=1, the drive is in Sequential Select mode, and the monitor displays the next
orient offset.
If Marker Offset Selection parameter P2-01=2, the drive is in Memobus Communication Selection mode, and the monitor
displays the count value currently in Memobus register 0012h.
U7-05: Sequence Step
This monitor displays the range 0 to 4 which corresponds to the parameters P2-02, P2-03, P2-04, and P2-05 and the
Memobus register 0012h. The value corresponds to the offset to which the drive orients when the orient digital input is
activated.
If Marker Offset Selection parameter P2-01=0, the drive is in digital input Select mode, and monitor U7-05 is updated
with the value corresponding to the current state of the digital input(s) at the time when a valid orient digital input is
activated.
Orient Position Offset Selection on page 25 for the digital input states.
If Marker Offset Selection parameter P2-01=1, the drive is in Sequential Select mode, and the monitor displays the next
orient offset. This value is reset every time an orient digital input is activated.
If Marker Offset Selection parameter P2-01=2, the drive is in Memobus Communication Selection mode, and the monitor
displays the value 4. The U7-04 monitor displays the count value currently in Memobus register 0012h.
U7-06: Serial Offset
This monitor displays the orientation position offset specified by the Memobus register 0012h. Since the Memobus
register is not saved upon power loss, this monitor is re-initialized to 0 counts upon power up.
Note: This monitor reflects the value last written to the Memobus register. Since the Memobus register offset value is latched when an
orient digital input is activated, the value displayed on the monitor may not match the orient position if the Memobus register is
rewritten during orient.
„ Orient ASR P Gain and I Time
The Spindle Orient function has the ability to change the ASR parameters during orient. This feature is enabled by the
Orientation ASR Enable Parameter P2-09. When P2-09 is set to enabled, the drive switches from the active C5-0 ASR
P Gain and ASR I Time to the values programmed in P2-10 (ASR P Gain 3) and P2-11 (ASR I Time 3).
To prevent any sudden change in operation at P1-01, the ASR P Gain is ramped from the current C5-0 level to the P2-
10 level over the time period specified by the P2-11 ASR I Time. The P2-11 ASR I Time is switched immediately upon
reaching the P1-01 Orient Speed. Once the drive enters Zero Servo Control, the P2-11 ASR gain setting is ramped to the
P2-12 (ASR P Gain 4) setting over the time specified by parameter P2-13 (ASR I Time 4).