Siemens SINUMERIK 808D Parameter Manual page 186

Machine data
3.3 Channel-specific machine data
Bit 2=1: active D no. > 0 and active T no.=0 lead to an alarm message
Active D no. > 0 and active D no.=0 lead to an alarm message
Bits 3 and 4 are only relevant with active tool management.
Function:
Control of the behavior of the init. block generation on program start if a disabled
tool is on the spindle and this tool is to be activated.
See also: MD20112 $MC_START_MODE_MASK, MD20110 $MC_RESET_MODE_MASK
On RESET, this does not affect the behavior "Keep disabled tool on the spindle active".
Bit 3=0: Standard: If the tool on the spindle is disabled, generate a tool change
command requesting a replacement tool. An alarm will be generated if there is no such
replacement tool.
Bit 3=1: The disabled status of the spindle tool is ignored. The tool becomes active.
The subsequent part program should be formulated so that no parts are machined with
the disabled tool.
Bit 4=0: Standard: The system tries to activate the spindle tool or its replacement
tool
Bit 4=1: If the tool on the spindle is disabled, T0 is programmed in the start init
block.
The combination of bits 3 and 4 produces the following statements:
0 / 0: Behavior as before, automatic change on NC start if a disabled tool is in the
spindle
1 / 0: No automatic change
0 / 1: A T0 is automatically generated if a disabled tool is in the spindle at NC start
1 / 1: No statement
Bit 5: Reserved
Bit 6=0: Standard: If T0 or D0, only T0 or D0 is exactly programmed.
This means that MD20270 $MC_CUTTING_EDGE_DEFAULT and MD20272 $MC_SUMCORR_DEFAULT
define, with the programming of T0 the value of D, DL.
For example, MD20270 $MC_CUTTING_EDGE_DEFAULT=1
MD20272 $MC_SUMCORR_DEFAULT=2
MD22550 $MC_TOOL_CHANGE_MODE=0 (tool change with T programming)
N10 T0; T no. 0 has active number D1 and DL=2 which results in offset zero. If bit 2
is also set:
Programming of
a) T0; for tool deselection
b) D0; for offset deselection
generates an alarm, if at least one of the machine data
MD20270 $MC_CUTTING_EDGE_DEFAULT
MD20272 $MC_SUMCORR_DEFAULT
is not equal to zero (T0 D0 DL=0 is the correct programming).
or MD20272 $MC_SUMCORR_DEFAULT is not equal to zero (D0 DL=0 is the correct
programming).
Bit 6=1: controls the NCK response when programming (x, y, z all greater than zero),
if at least one of
MD20270 $MC_CUTTING_EDGE_DEFAULT
MD20272 $MC_SUMCORR_DEFAULT
is not equal to zero.
a) Tx Dy -> T0
T0 is automatically programmed in NCK D0 or D0 DL=0; i.e. values not equal to zero of
MD20270 $MC_CUTTING_EDGE_DEFAULT, MD20272 $MC_SUMCORR_DEFAULT are treated as value
equal to zero.
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Parameter Manual
List Manual, 01/2017