Siemens SINUMERIK 840D sl Commissioning Manual page 111

● GUDs (Global User Data)
● LUDs (Local User Data)
● PUDs (Program global User Data)
● Analog inputs/outputs
● Data exchange via FC21
are not converted automatically. The user is prompted to take the current valid measuring
system MD10240 SCALING_SYSTEM_IS_METRIC into consideration.
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".
Machine data
Table 10-5 Switching over the unit system: Machine data
Number Name of identifier
General ($MN_ ... )
10240 SCALING_SYSTEM_IS_METRIC
10250 SCALING_VALUE_INCH
10260 CONVERT_SCALING_SYSTEM
axis spec. ($MA_ ... )
32711 CEC_SCALING_SYSTEM_METRIC
Literature
Function Manual; speed, setpoint/actual-value systems, control: Metric/inch measuring
system
IBN CNC: NCK, PLC, drive
Commissioning Manual, 07/2007, 6FC5397-2AP10-3BA0
Name / remarks
Basic system metric
Conversion factor for switch-over to inch system
Basic system switch-over active
System of measurement of sag compensation
NCK start-up
10.2 System data
Reference
G2
111