Siemens SIMATIC FM 353 Manual page 68

Defining Parameters
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
Generation of internal measured value factor MWFAKTOR
MWFAKTOR = UMWEG / MD13
Activation of software limit switches SEAKT
MD21
9
= −10
9
≠ −10
9
= −10
9
≠ −10
Internal generation of absolute traversing range limits VFBABS
MWFAKTOR
< 1
w 1
Verification:
MD9 check
MD8 MD18
0
1 w 4
< 4
5-16
−32
MD22
9
= +10 0 (inactive)
9
= +10
9
≠ +10
1 (active) (
9
≠ +10
9
10 / MWFAKTOR
9
10
Permissible rotary axis end
any, not relevant
MD9 mod UMWEG == 0
SEAKT
)
VFBABS
(MD41@MWFAKTOR) / 500
vMD9vVFBABS vMD9vVFBABS
FM 353 Stepper Drive Positioning Module
6ES7 353-1AH01-8BG0