Omron CJ1W-MA - REV 10-2008, Operation Manual

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Axis Operating Input Memory Areas Section 4-8
No Origin Flag
Word b
Bit 06
Function This flag turns ON when the origin is not established. Except when using Ser-
vomotors with absolute encoders, the PCU's No Origin Flag turns ON immedi-
ately after a connection is established, at which time the origin is not
established. (The No Origin Flag turns OFF, however, immediately after the
PCU power is turned ON or the Unit is restarted, and the flag remains OFF
until the first CONNECT is executed.) The origin for each axis is determined
by either of the following origin positioning operations, after which the No Ori-
gin Flag turns OFF.
ORIGIN SEARCH, PRESENT POSITION PRESET
When using Servomotors with absolute encoders, the origin is established by
reading the absolute value data when establishing a connection or executing
SERVO LOCK. The established origin is held even if SERVO UNLOCK is exe-
cuted, and will not be set to no origin status. No origin status (No Origin Flag
ON) occurs under the following conditions.
• When DEVICE SETUP is executed (during Servo unlock status)
• When a connection is released (See note.)
Note When a connection is released (including a disconnection due to error), the
status for each axis becomes undefined (non-execution), except for the Error
Flag and axis error code. The No Origin Flag turns ON while in no origin (ori-
gin not established) status.
Origin Stop Flag
Word b
Bit 07
Function This flag turns ON when the origin has been established and the present posi-
tion of each axis is within the
Origin Range set in Servo Parameter Pn105 for
the R88D-G @ or Zero Point Width set in Servo Parameter Pn803 for the
R88D-WT @ , the R88D-WN @ -ML2, or a SMARTSTEP Junior Servo Drive.
This flag turns ON for the interval in which the present position is within the
Origin Range or Zero Point Width when it passes the Origin Range or Zero
Point Width during axis operation.
Origin range (Pn105) for G Series
Zero point width (Pn803) for W Series, SMARTSTEP Junior
Established origin
Origin Stop Flag
Forward direction
The Origin Stop Flag turns ON while the present position is within the
range of
±
Pn105 for G-series Servo Drives or
±
Pn803 for W-series and
SMARTSTEP Junior Servo Drives from the established origin when
traveling forward.
Origin range (Pn105) for G Series
Zero point width (Pn803) for W Series, SMARTSTEP Junior