Siemens SIMATIC FM 353 - Zero Offset (Write Request in the User DB, DBX39.1)

Description of Functions
9-46
FM 353 Stepper Drive Positioning Module
6ES7 353-1AH01-8BG0
Restart
You can use this command to reset the axis.
S Pulse output is interrupted.
S The instantaneous processing status is canceled, and synchronization in incre-
mental encoders is deleted.
S Active compensation values are deleted.
S An acknowledge signal is issued for all errors.
Undo set actual value
You can use this command to reset coordinates modified with the functions “Set
actual value” and “Set actual value on-the-fly” to their original value (if the axis is
not in motion).
9.3.4 Zero offset (Write request in the user DB, DBX39.1)
Function of zero offset
A selection, change or cancellation of a zero offset takes effect with the next posi-
tioning action. With a zero offset, the instantaneous shift of the coordinate system
is canceled, provided that a zero offset was already active and the specified shift
change (ZONPV
new
− ZO
old
) was executed with the first positioning. All coordi-
nates and software limit switches, the reference point and the actual value are up-
dated accordingly.
The reference of the workpiece coordinate system is provided via the zero offset.
The actual values read from the FM 353 refer to the machine coordinate system.
The position specification in a traversing block is referred to the workpiece
coordinate system.