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Description of Functions
Note
The measurement system (MD7) must match the measurement system specified
in the other DBs.
The measurement system raster (MSR) is the smallest distance unit in the active
system of measurement.
If at some point you have failed to take this precaution:
1. Delete all data blocks (which do not match the measurement system) or clear
the memory of the FM 353 completely.
2. Modify the other data blocks on the PG.
3. Reload the data blocks to the FM 353.
9.5
Axis type
Overview
You can select the axis type with machine data item MD8. Choose either of the
following types:
S Linear axis
S Rotary axis
Linear axis
A linear axis moves between two range limits (traversing range min −10
9
10
). The range limits may be bounded by software limit switches (MD21, MD22)
to form the "working range."
Linear axes have a limited traversing range. The limits are imposed by the:
S Resolution of the numerical scale
S The range covered by an absolute encoder.
M
Motor
Fig. 9-3
9-60
Movement
Linear axis
G
Encoder
FM 353 Stepper Drive Positioning Module
6ES7 353-1AH01-8BG0
9
, max
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