Siemens Sinumerik 840DiE sl - Page 299

01/2007
11.3 System data
11-299
© Siemens AG 2007 All Rights Reserved
SINUMERIK 840Di sl Manual (HBIsl) – 01/2007 Edition
When the system of measurement is changed, all lengthrelated parameters are
automatically converted to the new system of measurement from the perspec-
tive of the operator. This includes:
– Positions
– Feed rates
– Acceleration rates
– Jerk
– Tool offsets
– Programmable, settable and work offsets external and DRF offsets
– Compensation values
– Protection zones
– Machine data
– Jog and hand wheel factors
After switching, all above mentioned data are available in the physical units as
described in Section 11.3.2, Page 11-294.
Data for which no unique physical units are defined, such as:
– Arithmetic variables
– GUDs (Global User Data)
– LUDs (Local User Data)
– PUDs (Program global User Data)
– Analog inputs/outputs
– Data exchange via FC21
are not
converted automatically. In this case, the user must allow for the current
system of measurement in MD 10240: SCALING_SYSTEM_IS_METRIC.
The current system of measurement setting can be read at the PLC interface
via the ”inch system” signal DB10.DBX107.7. DB10.DBB71 can be used to read
out the ”system of measurement change counter”.
Table 11-9 Switching over the unit system: Machine data
Number
Identifier Name/remarks Refer-
ence
General ($MN_ ... )
10240 SCALING_SYSTEM_IS_METRIC Basic system metric
10250 SCALING_VALUE_INCH Conversion factor for switch–over to inch system
10260 CONVERT_SCALING_SYSTEM Basic system switch–over active
Axis–specific ($MA_ ... )
32711 CEC_SCALING_SYSTEM_METRIC System of measurement of sag compensation G2
/FB/ Description of Functions, Basic Functions,
G2 Velocities, Setpoint/Actual Value Systems, Closed–Loop Control,
Section: Metric/inch measuring system
System data
Machine data
References
11 NCK Commissionin
g
with HMI Advanced