Omron CS1W-MCH71 -, Operation Manual

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Coordinate System
Section 9-3
Software Limit Range
Note Meaning of arrows.
→
: The alarm [3005h: Positive direction software limit] occurs.
←
: The alarm [3006h: Negative direction software limit] occurs.
9-3-4 Absolute Value Detection Function
Relation Between
Coordinate System and
Absolute Value Detection
Function • The absolute encoder stores the multi-turn data in the internal battery
backup memory. Therefore, the origin on the coordinate system can be
defined without executing an origin search after the power is turned ON.
• In the MC Unit, when the bit [ABS Origin Setting] is turned ON, the rela-
tions between the absolute data read from the absolute encoder when
communications were established and the coordinate system managed in
the Unit will be saved in the Flash memory.
Using as Limited Length
Axis • When using an axis as the limited length axis, make sure to operate the
axis within the range where the multi-turn data is not reset.
• When the servo parameter [Pn205: Multi-turn limit setting] is 65535
(default setting), the multi-turn data will change as shown below:
• There will be no problem if the axis is used within the range where the
multi-turn data is between –32768 to 32767. However, if the power is
turned OFF once, and ON again when the axis is outside of the range, the
present position cannot be read correctly. No alarm will occur.
Specification Operation (Shaded area is the operating range.)
P3AA04 = 0 The entire area is the operating range.
P3AA03 P3AA02
P3AA04 = 1 Lower than [P3AA02: + direction software limit] is the operating range.
P3AA03 P3AA02
→
P3AA04 = 2 Higher than [P3AA03:
−
direction software limit] is the operating range.
P3AA03 P3AA02
←
P3AA04 = 3
P3AA03 < P3AA02
The area between [P3AA03] and [P3AA02] is the operating range.
P3AA03 P3AA02
← →
P3AA04 = 3
P3AA03 = P3AA02
The entire area is the operating range.
P3AA02 = P3AA03
P3AA04 = 3
P3AA03 > P3AA02
The entire area is the operating range.
P3AA02 P3AA03
0
−
32768
32767
Rotation amount
Multi-turn data