Description of Functions
9-21
FM 353 Stepper Drive Positioning Module
6ES7 353-1AH01-8BG0
When crossing the RPS, a signal length of
∆
t
2
FM cycle
must be assured!
The following table shows you the exact location of the synchronization point on
the current-sourcing pattern zero or zero pulse external.
Synchronization point encoder Selec-
tion in MD37
Applicable for type (0
−
3) of the refer-
ence point approach per MD18
Current-sourcing pattern zero
RPS
V
R
Zero pulse external (NIX)
RPS
V
R
NIX
Center
Using a reversing switch
If it is possible for the axis to be “behind” the reference point switch when you start
reference point approach, a reversing switch can be installed at the end of the axis
in the approach direction, in order to reverse the axis in the direction of the refer-
ence point switch.
On axis movements with referencing feed, a signal length of
∆
t
2
FM
cycle
must be assured for the reversing switch!
Example
Approach direction from MD18
Reversing
switch
Emergency
limit switch
Reference point
Axis position
RPS
The value for the reference-point shift (MD27) is traveled after the synchronization
point is reached.
Summary of Contents for SIMATIC FM 353
Page 22: ...Product Overview 1 12 FM 353 Stepper Drive Positioning Module 6ES7 353 1AH01 8BG0 ...
Page 32: ...Installing and Removing 3 6 FM 353 Stepper Drive Positioning Module 6ES7 353 1AH01 8BG0 ...
Page 282: ...Description of Functions 9 82 FM 353 Stepper Drive Positioning Module 6ES7 353 1AH01 8BG0 ...
Page 354: ...User Data Block AW DB B 16 FM 353 Stepper Drive Positioning Module 6ES7 353 1AH01 8BG0 ...