Switching Over The Measuring System - Siemens SINUMERIK 840Di Manual
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06.03
MD11200: INIT_MD
Input values
10.3.5
Switching over the measuring system
Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
The input values in MD11200: INIT_MD (loading the default machine data with
the next NC boot), which are listed below, various data areas can be loaded
when the NC 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 NC power-up, all machine data (with the exception of the memory
configuring data) are overwritten with default values.
MD11200: INIT_MD = 2
On the next NC power-up, all memory-configuring machine data are overwritten
with default values.
The unit system is switched over for the entire machine using a soft key in the
HMI Advanced operating area "MACHINE". The switch will only be accepted if:
S
MD10260: CONVERT_SCALING_SYSTEM=1
S
Bit 0 of MD20110: RESET_MODE_MASK is set in each channel
S
all channels are reset
S
the axes are not traversed with JOG, DRF or the PLC
S
constant grinding wheel peripheral speed (GWPS) is not active.
For the duration of the switching, actions, such as parts program start or mode
change, are blocked.
If the switch cannot be carried out, this is indicated by an appropriate message
on the operator interface. This definition ensures that the program currently exe-
cuted always finds a consistent data record with reference to the unit system.
The switch to the unit system itself is internally carried out by writing of all ma-
chine data required and then activating them by RESET.
MD10240: SCALING_SYSTEM_IS_METRIC and the corresponding settings
G70/G71/G700/G710 in MD20150: GCODE_RESET_VALUES are switched for
all channels configured automatically.
During this process, the value specified in MD20150: GCODE_RE-
SET_VALUES[12] changes between G700 and G710.
This process is carried out irrespective of the protection level currently set.
10 NC Start-Up with HMI Advanced
10.3 System data
10-287
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