System Of Measurement - Siemens SIMATIC FM 353 Manual

9.4

System of measurement

Overview
At the start of parameterization, you must fill in the basic machine data item sys-
tem of measurement (MD7). This item governs the input of values.
Variants of the system of measurement
You can set the system of measurement for the following three units:
S mm
S inches
S degrees
Input of machine data
All value inputs and all value ranges refer to the setting in the system of measure-
ment.
Internal processing of values
In "Parameterize FM 353" and in the FM 353 itself, values are processed in the
following base units:
S 0.001 mm
S 0.0001 inch
S 0.0001 degree
Examples
The sample values in the table below illustrate the relation between the system of
measurement and internal values:
System of
measurement
mm
inches
degrees
FM 353 Stepper Drive Positioning Module
6ES7 353-1AH01-8BG0
Internal values
−3
10 mm 10 995@10
−4
10 in(ch) 10 995@10
−4
10 degree 3,600,000@10
−2
10 degree 36,000@10
Description of Functions
Input at interface
−3
mm 10.995 mm
−4
in(ch) 1.0995 in(ch)
−4
degree 360.0000 degree
−2
degree 360.00 degree
9-59