Siemens SIMATIC FM 452 Manual page 89

Range of Values of the Resolution
The range for the resolution must be converted to the basic system of units. The
resolution must be kept within this range by selecting the values "distance per
encoder revolution" and "increments per encoder revolution".
Based on the systems of units, the ranges for the resolution are as follows:
System of
units
mm
inches
degrees
pulses
Example
An incremental encoder has the following data:
– Increments per encoder revolution: 5000
– Distance per encoder revolution: 1000 mm
– 1 increment = 4 pulses
This results in the following resolution (quadruple evaluation):
Resolution
An SSI encoder has the following data:
– Increments per encoder revolution: 4096
– Distance per encoder revolution: 1000 mm
– 1 increment = 1 pulse
This results in the following resolution:
Resolution
FM 452 Electronic Cam Controller
C79000-G7076-C452-04
Specifications Range for the Resolution
in...
–3 –3
10 mm 0.1 10
–4 –4
10 inches 0.1 10
–4 –4
10 degrees 0.1 10
–3 –3
10 degrees 0.1 10
–2 –2
10 degrees 0.1 10
1 pulse 1
1000 mm
= = 0.2000
5000 increments
mm
= 0.0500
pulse
1000 mm
= = 0.2441
4096 increments
Machine Data and Cam Data
–3
mm .... 1000 10 mm/pulse
–4
inch .... 1000 10 inches/pulse
–4
degrees .... 1000 10 degrees/pulse
–3
degrees .... 1000 10 degrees/pulse
–2
degrees .... 1000 10 degrees/pulse
mm
=
0.2000
increment
mm
= 0.2441
increment
mm
4 pulses
mm
pulse
8-21