Siemens SINUMERIK 840D Description Of Functions page 168

3 Safety-Related Functions
3.11 Encoder mounting arrangements
3.11 Encoder mounting arrangements
3.11.1 Encoder types
Basic types The following basic types of encoder can be used on a drive module for the
purpose of safe operation:
•
•
Combinations of Various combinations can be derived from the basic types.
encoder types
Table 3-64
1-encoder system For a 1-encoder system, the incremental or absolute encoder at the motor is
used for the actual values of the NC and drive.
The 611 digital control module supplies one actual value to the NCK and drive
via 2 separate actual value channels..
Special feature for linear motors:
For linear motors, the motor encoder (linear scale) is also the measuring
system at the load. IMS and DMS are one measuring system. The connection
is made at the IMS input of the 611 digital control module.
A n sc h lu ß
d e s
M o to rg e b e rs
(IM S )
A n sc h lu ß
d e s d ire kte n
L a g e g e b e rs
(D M S )
V S A
Fig. 3-39 1-encoder system for a feed drive
3-168
SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
Incremental encoder
with sinusoidal voltage signals A and B (signal A is in quadrature with
signal B) and a reference signal R
e.g.: ERN 1387, LS 186, SIZAG2
Absolute encoder
with EnDat interface and incremental, sinusoidal voltage signals A and B
(signal A is in quadrature with signal B)
e.g.: EQN 1325, LC 181
Combinations of encoder types
Incremental encoder
at the motor at the load at the motor
x
x
x x
x
x
Note: x Encoder connection
G e b e r
G e tr i e b e
M o to r
(V S A )
Absolute encoder
at the load Comments
1-encoder system
1-encoder system
2-encoder system
x 2-encoder system
x 2-encoder system
M a s ch in e n tisc h
L o se
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11.03
G E B E R _ 0 2 . D S F