Starting up
7-18
FM 353 Stepper Drive Positioning Module
6ES7 353-1AH01-8BG0
7.3.3 Basic startup of stepper motor control
Overview
Use the following flow charts to verify the drive actuation and that the machine
data determined so far are correct. Since the FM 353 positions the stepper motor
axis without using encoders (i.e., from control engineering standpoint, pure, direct
control; see Fig. 7-10), special attention must be placed on evaluating the travers-
ing movement. An initial test should be conducted to verify that the stepper motor
will traverse as a matter of course in response to actuation by the FM 353. A se-
cond test should be conducted to verify positioning accuracy. (Always activate MD
changes using “Activate MD”!)
Note
Always activate MD changes using “Activate machine data”!
!
Caution
Prior to triggering any traversing movements, check to make sure there is clear-
ance for axis movement in the desired direction of travel!
Basic startup
Use the following flow chart to verify the drive actuation.
Starting the axis
Start the axis with the “space bar” after preselecting the direction via R+ or R−.
The “Windows properties” allow for successive execution of the command (re-
peated starting/stopping of the axis) when the “space bar” is depressed in quick
succession.
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