Type of
Linear
Encoder
Manufacturer Linear Encoder Model Linear
Encoder
Pitch [μm]
*1
Model of Serial Con-
verter Unit or Model
of Head with Interpo-
lator
Resolu-
tion
Resolution
SR87-LF*5
80 – 8,192 0.0098 μm
SR87-MF
80 – 1,024 0.078 μm
SQ47/SQ57-
SF
SQ47/SQ57-
TF
20.48 – 4,096 0.005 μm
SQ47/SQ57-
AF
SQ47/SQ57-
FF
40.96 – 4,096 0.01 μm
Fagor Automa-
tion S. Coop
L2AK208 20 – 256 0.078 μm
L2AK211 20 – 2,048 0.0098 μm
LAK209 40 – 512 0.078 μm
LAK212 40 – 4,096 0.0098 μm
S2AK208 20 – 256 0.078 μm
SV2AK208 20 – 256 0.078 μm
G2AK208 20 – 256 0.078 μm
S2AK211 20 – 2,048 0.0098 μm
SV2AK211 20 – 2,048 0.0098 μm
G2AK211 20 – 2,048 0.0098 μm
*1. These are reference values for setting SERVOPACK parameters. Contact the manu-
facturer for actual linear encoder scale pitches.
*2. This is the model of the Serial Converter Unit.
*3. This is the model of the Head with Interpolator.
*4. This is the model of the Interpolator.
*5. If you use an encoder pulse output with this linear encoder, the setting range of the
encoder output resolution (Pn281) is restricted. Refer to the following section for details
on the encoder output resolution (Pn281).
Ä
Chap. 7.6.3 ‘Setting for the Encoder Divided Pulse Output’ page 218
Resolution
You can calculate the resolution that is used inside the SERVOPACK
(i.e., the travel distance per feedback pulse) with the following formula.
Resolution (travel distance per feedback pulse) =
Linear encoder pitch
Resolution of Serial Converter Unit or linear encoder
Fig. 131: Calculation of the Travel Distance per Feedback Pulse used inside the SERVO-
PACK - Formula
The SERVOPACK uses feedback pulses as the unit to control a Servomotor.
Sigma-7 Series SERVOPACKs
Basic Functions That Require Setting before Operation
Setting Unit Systems > Setting the Position Reference Unit
| | PROFINET Communications - SIEP YEUOC7P 02A Revision 0 | en | 183
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