Siemens SIMATIC FM 353, Manual

Page: 68 / 361

Defining Parameters
5-16
FM 353 Stepper Drive Positioning Module
6ES7 353-1AH01-8BG0
Dependencies
With certain combinations of machine data, restrictions in the value range arise for
non-processing of the machine data.
These dependencies are verified on acceptance of the MD DB or individual ma-
chine data, and an error message is output in the event of a violation. Some
checks are performed on the basis of internally calculated reference variables.
These reference variables and the dependency checks are described in the tables
below.
Reference variables generated internally from MD:
Generation of travel per motor revolution UMWEG
UMWEG = MD11 + MD12 2
− 32
Generation of internal measured value factor MWFAKTOR
MWFAKTOR = UMWEG / MD13
Activation of software limit switches SEAKT
MD21 MD22 SEAKT
= − 10
9
= +10
9
0 (inactive)
≠
− 10
9
= +10
9
= − 10
9
≠
+10
9
1 (active)
≠
− 10
9
≠
+10
9
( )
Internal generation of absolute traversing range limits VFBABS
MWFAKTOR VFBABS
< 1 10
9
/ MWFAKTOR
1 10
9
Verification:
MD9 check
MD8 MD18 Permissible rotary axis end
0 any, not relevant
1 4 (MD41 MWFAKTOR) / 500
MD9 VFBABS
< 4 MD9 mod UMWEG == 0
MD9 VFBABS