Actual Value Conditioning; Encoder Types - Siemens SINUMERIK 840D sl Function Manual

Basics on the Safety Functions Integrated in the System/Drive

5.4 Actual value conditioning

5.4 Actual value conditioning
5.4.1

Encoder types

Basic types
The following basic encoder types can be used with a drive module to implement
safety–related operation:
1. Incremental encoder via a Sensor Module and DRIVE–CLiQ
with sinusoidal voltage signals A and B (signal A is shifted with respect to B
through 90° and a reference signal R, e.g.: ERN 1387, LS 186, SIZAG2
2. Absolute encoder via Sensor Module and DRIVE–CLiQ
with an EnDat interface and incremental sinusoidal voltage signals A and B
(signal A is shifted with respect to B through 90°), e.g.: EQN 1325, LC 181
3. Motor encoder (IMS) with integrated DRIVE–CLiQ interface, with the properties
corresponding to 1. or 2.
4. Direct encoder (DMS, e.g. linear scale) with integrated DRIVE–CLiQ interface,
with the properties corresponding to 1. or 2.
Combining encoder types
Various combinations can be derived from the basic types.
Table 5-1
Incremental encoder
at the motor at the load
x
x
x
Note: x –> encoder connection
5-96
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 05.2008 Edition
Combining encoder types
at the motor
x
x x
x
x
Absolute encoders
at the load
x
x
© Siemens AG 2008 All Rights Reserved
05.08
Comments
1–encoder system
1–encoder system
2–encoder system
2–encoder system
2–encoder system
2–encoder system