Parameter Manual
Operating Instructions, 08/2013, 6FC5397-8EP40-0BA0
33
Machine data
2.2 General machine data
Description: The MD defines the basic system used by the control for scaling length-depen-
dent physical variables for data input/output.
All corresponding data are stored internally in the basic units of 1 mm, 1
degree and 1 sec.
In the case of access from the interpreter ( part program and download ),
from the operator panel ( variable service ) or through external communica-
tion, scaling takes place in the following units:
MD10240 $MN_SCALING_SYSTEM_IS_METRIC = 1: scaled in:
mm, mm/min, m/s2 , m/s3, mm/rev.
MD10240 $MN_SCALING_SYSTEM_IS_METRIC = 0: scaled in:
inch, inch/min, inch/s2, inch/s3, inch/rev.
The selection of the basic system also defines the interpretation of the pro-
grammed F value for linear axes:
metric inch
G94 mm/min inch/min
G95 mm/rev. inch/rev.
If this machine data is changed, a startup is required because otherwise the
associated machine data that have physical units would be incorrectly scaled.
Proceed as follows:
• MD changed manually
First start up and then enter the associated machine data with physical
units.
• MD changed via machine data file
First start up and then reload the machine data file so that the new physical
units are taken into account.
If the machine data are altered, alarm 4070 "Scaling machine data altered" is
output.
Application example(s):
Setup is in the metric system and then changed over to the inch system.
Special cases:
The factor used for changing from 1 mm to 1 inch can be changed with MD10250
$MN_SCALING_VALUE_INCH.
10240 SCALING_SYSTEM_IS_METRIC N01 G2,K3,A3,S1
- Basic system metric BOOLEAN PowerOn
SCAL
- - TRUE 0 - 2/2
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