Siemens simovert masterdrives, Справочник

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Technology Option F01 08.2012
6SE7087-6QX70 (Version AN) Siemens AG
9-120
Compendium Motion Control SIMOVERT MASTERDRIVES
9.6 Configuration
9.6.1 Encoders for the position sensing system
The sensor boards for the various encoders that can be connected to
MASTERDRIVES MC are described in the first section of "Brief
description of the technology functions". The table is intended as a
configuring aid, and shows an overview of the properties of the various
encoders:
Encoder
Type Sensor Board in
MASTERDRIVES
MC Resolution
Achievable
Positioning
Accuracy
1)
Can be Used as
[Increments/ Revolution] [Increments/
Revolution
Motor
Encoder External
Encoder
Resolver
2) SBR1/SBR2
(without/with pulse
encoder simulation) 4096 inc./rev.
with 2-pole resolver 1024 inc./rev.
with 2-pole
resolver Yes No
Sin/cos
encoder ERN
1387
5)
SBM2
16,8 x 10
6
Inc/rev. 10
5
... 10
6
Inc./rev.
Yes Yes
Absolute
encoder
EQN 1325 5) SBM2
16.8 x 10
6
inc./rev.
4096 rev. reproducible 7)
10
5
... 10
6
Inc./rev.
Yes Yes
Pulse
encoder
3)
SBP No. of lines x 4, i.e. 4096
inc./rev. with standard
motor encoder Number of lines x 1,
i.e. 1024 inc./rev.
with standard motor
encoder Yes (with
asynchr-
onous
motor) Yes
SSI absolute
encoder
4)
SBM2 4096 inc./rev. typical
4096 revolutions typically
reproducible 1024 inc./rev.
typical No Yes
Absolute
encoder
EQI1325 6) SBM2 4096 Inc/rev. 1024 Inc/rev. Yes No
Notes:
1)
In practice, the resolution of the encoder must be between 1 and 10 times
higher than the required positioning accuracy. The accuracies specified in
the table are only approximate guidelines.
2) Notes on resolver:
•
Correspondingly higher resolution and accuracy with multi-pole resolvers
• In the following cases, you should use an ERN1387 sin/cos encoder
instead of a resolver:
• If extremely high positioning accuracy is required
•
If an extremely high control response is required
• If printing indices are to be detected exactly
•
If a good rotary response is required at extremely low speeds below
approx. 5 rpm.
•
With the SBR2, the pulse encoder simulation is connected to terminals
with 2 tracks each with 512 or 1024 pulses per revolution (adjustable) and
zero pulse, RS422 level (TTL differential signal). Valid for 2-pole
resolvers; correspondingly larger number of pulses per revolution with
multi-pole resolvers.