4
01/2008 Machine operating area
4.2 General functions and displays
4
© Siemens AG 2008 All rights reserved.
SINUMERIK 840Di sl/840D sl/840D Operating Manual HMI-Advanced (BAD) - 01/2008 Edition 4-109
4.2.14 Inch ↔ Metric switchover
Function
The control can work with imperial inches or metric units of
measurement. You can switch between imperial inches and metric
units of measurement in the "Machine" operating area. The control
converts the values accordingly.
In order to convert the channel-specific values in the machine date,
display machine data 9014 must be set to 1.
Machine manufacturer
The switchover is only possible if:
• The corresponding machine data have been set.
• All channels are in the Reset state.
• Axes are not traversing with JOG, DRF or PLC control.
• Constant grinding wheel peripheral speed (GWPS) is not active.
Display machine data 9011 is used to define the display resolution for
the imperial units of measurement (inches).
Actions such as mode change or part program start are disabled for
the duration of the switchover.
Sequence of operations
"AUTO"/"MDI"/"JOG" mode is selected in the "Machine" operating
area.
Switch to
metric
Press the “ETC” key followed by
the "Switch to metric" softkey.
When the measuring system is changed, all length-related parameters
are automatically converted to the new measuring system from the
perspective of the user.
If the switchover cannot be performed, this is indicated by a message
on the user interface.
References
Function Manual Fundamentals, G2 Chapter "Metric/inch measuring
system"
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