Yaskawa Large Capacity Sigma II Series - Manual (Page 160)

4 Parameter Settings and Functions
4-84
4.7 Absolute Encoders
If a motor with an absolute encoder is used, a system to detect the absolute position can be made
in the host controller. Consequently, operation can be performed without zero point return oper-
ation immediately after the power is turned ON.
Motor SGMBH-†††2†···With 17-bit absolute encoder
SGMBH-†††3†···With 20-bit absolute encoder (option)
* When the multiturn limit setting (Pn205) is changed, the motion differs.
Refer to 4.7.6 Multiturn Limit Setting.
Always detects
absolute position.
zero point return
operation
Absolute encoder
• The output range of multiturn data for Σ-ΙΙ Series absolute detection system differs from that for
conventional systems (15-bit encoder and 12-bit encoder). Specially when “Infinite length position-
ing system” of conventional type is to be configured with
Σ-ΙΙ Series, be sure to make the following
system modification.
WARNING
Absolute Encoder Type Output Range of
Multiturn Data
Motion When Exceeds the Limit
Conventional Types
(12-bit and 15-bit) -99999 to
+ 99999 • When exceeds the upper limit (+99999) in the
positive direction, the multiturn data is 0.
• When exceeds the lower limit (-99999) in the
negative direction, the multiturn data is 0.
Σ-ΙΙ Series
(16-bit, 17-bit, and
20-bit)
-32768 to
+ 32767 • When exceeds the upper limit (+32767) in the
positive direction, the multiturn data is -32768.
• When exceeds the lower limit (-32768) in the
negative direction, the multiturn data is
+32767.*