Machine Data For The Axis - Siemens SIMATIC FM 351 Installation Manual

8.3

Machine Data for the Axis

Definition
The axis has the input ranges:
Data List The description of all data for the axis input range can be found in Table 8-3.
Table 8-3

Machine Data for the Axis

Machine Data and
Assignment
Axis type: The linear axis is an axis which has a physically limited travel range.
Linear axis
Rotary axis
The rotary axis is an axis for which the travel range is not limited by mechanical
end-stops.
Largest displayed value
End of rotaty axis: The value, End of rotary axis, is theoretically the largest value which the actual value
can attain.
0.001 mm
The theoretically highest value (in the example below: 1000 mm) is however never
to
displayed, because it physically labels the same position as the start of the rotary axis
+1,000,000.000 mm
(0).
The display jumps:
The largest value which is displayed for a rotary axis, has the value:
End of rotary axis [ m] - Resolution [ m/increment] 1 [Increment]
Rotary axis with absolute encoders
With a rotary axis with an absolute encoder the rotary axis range (0 to End of rotary
axis) must exactly cover the total number of encoder steps.
FM 351 Positioning Function Module
EWA 4NEB 720 6001-02
Axis type
Entries for the reference point on the axis
Axis limits
Physical start
With a positive direction of rotation from 999 mm to 0 mm.
With a negative direction of rotation from 0 mm to 999 mm.
End of rotary axis Number of revolutions ·
Machine Data and Increments
Description
Physical end
Start of rotary axis = End of rotary axis
Steps
1
·
Revs. m
RESOL
incr
8
8-7