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

Page: 339 / 644

312
Absolute Encoder Origin Section 8-6
Axis Parameters
The following parameters are used to set the origin search operation mode.
d = 1860 hex + (Axis No.
−
1)
×
14 hex
When setting the absolute encoder's zero point position offset using an origin
search, set the position command value (i.e., the present position preset
value) to 0 and enable the origin search preset even when the preset value is
not being used for the origin search.
Note • Each time the absolute encoder zero point position offset is set using an
origin search operation, the Absolute Origin Offset for G Series (Pn200)
or Absolute Encoder Zero Point Position Offset for W Series (Pn808) is
saved to non-volatile memory in the Servo Drive. There is a limit to the
number of times non-volatile memory in the Servo Drive can be written
(10,000 times). Do not save the
Absolute Origin Offset for G Series
(Pn200) or Absolute Encoder Zero Point Position Offset for W Series
(Pn808) too frequently.
• The absolute encoder zero point position offset will not be set correctly
using an origin search operation if an error occurs before the end of the
origin search operation. Repeat the operation if an error occurs.
• If the absolute encoder PG zero point position offset is set using an origin
search operation, the MECHATROLINK transfer cycle and communica-
tions cycle settings will need to be changed. Refer to
Transfer Cycle and
Communications Cycle When Setting the Absolute Encoder Zero Point
Position Offset Using an Origin Search Operation with Position Control
Units with Unit Ver. 2.0
on page 230 and set the transfer cycle and com-
munications cycle correctly. If the transfer cycle and communications
cycle are not set correctly, the function to set the absolute encoder PG
zero point position offset using an origin search operation will not operate
correctly.
PCU's
address
Contents Setting
15 to 14 13 12 11 to 08 07 to 04 03 to 00
d+1 0 (fixed) Origin
search
preset Origin
search
direction Origin
detection
method Origin
search
operation 0 (fixed) Set the origin search operation.
Origin search direction
0: Reversal mode 1
Origin detection method
0: With origin proximity input signal
reversal (default setting)
1: Without origin proximity input sig-
nal reversal
2: Not use origin proximity input sig-
nal
Origin search direction
0: Forward (default setting)
1: Reverse
Origin search preset
1: Set
d+2 0 (fixed) 0 0 0 (fixed) 0 (fixed) Encoder
type 1: Absolute encoder