Switching Over The Measuring System - Siemens SINUMERIK 840DiE sl Manual

11 NCK Commissioning with HMI Advanced
11.3 System data
MD11200: INIT_MD
Input values
11.3.5

Switching over the measuring system

11-298
The input values in MD11200: INIT_MD (loading the default machine data with
the "next" NCK boot), which are listed below, various data areas can be loaded
when the NCK boots next time.
After setting the machine data, NCK reset must be carried out twice:
1. NCK RESET: The machine data is activated.
2. NCK RESET: Depending on the input value, the appropriate machine data
are set to their default values and MD11200: INIT_MD is reset again to the
value "0".
MD11200: INIT_MD = 1
On the next NCK boot, all machine data (with the exception of the memory con-
figuring data) are overwritten with default values.
MD11200: INIT_MD = 2
On the next NCK boot, all memory–configuring machine data are overwritten
with default values.
The unit system is switched over for the entire machine using a softkey in the
HMI Advanced operating area "MACHINE". The switchover is only accepted if:
S
MD10260: CONVERT_SCALING_SYSTEM=1.
S
Bit 0 of MD20110: RESET_MODE_MASK is enabled in every channel.
S
All channels are in the Reset state.
S
Axes are not traversing with JOG, DRF or PLC control.
S
Constant grinding wheel peripheral speed (GWPS) is not active.
Actions such as part program start or mode change are disabled for the dura-
tion of the switchover.
If the switchover cannot be performed, this is indicated by a message in the
user interface. These measures ensure that a consistent set of data is always
used for a running program with reference to the system of measurement.
The actual switchover of the system of measurement is performed internally by
writing all the necessary machine data and subsequently activating them with a
Reset.
MD10240: SCALING_SYSTEM_IS_METRIC and the corresponding settings
G70/G71/G700/G710 in MD20150: GCODE_RESET_VALUES are automati-
cally switched over consistently for all configured channels.
During this process, the value specified in MD20150:
GCODE_RESET_VALUES[12] alternates between G700 and G710.
This process takes place independently of the protection level currently set.
© Siemens AG 2007 All Rights Reserved
SINUMERIK 840Di sl Manual (HBIsl) – 01/2007 Edition
01/2007