Siemens SINUMERIK 840D sl Function Manual page 593

MD9004 $MM_DISPLAY_RESOLUTION
MD9011 $MM_DISPLAY_RESOLUTION_INCH
MD9010 $MM_SPIND_DISPLAY_RESOLUTION
MD9424 $MM_MA_COORDINATE_SYSTEM
These display machine data are copied to NCK machine data
MD17200 $MN_GMMC_INFO_UNIT[0] to MD17200 $MN_GMMC_INFO_UNIT[3]. allowing
them to be accessed from the NCK.
Activating
The basic block display is activated by MD 28400 $MC_MM_ABSBLOCK by means of Power
On. If MD28400 $MC_MM_ABSBLOCK is set to 1, a channelspecific display buffer (FIFO) is
created during power-up.
Size of display buffer (FIFO) = (MD28060 $MC_MM_IPO_BUFFER_SIZE + MD28070
$MC_MM_NUM_BLOCKS_IN_PREP) multiplied by 128 bytes. This corresponds to a size of
6KB in the machine data default setting.
Optimize size of display buffer:
The memory requirement can be optimized by entering a value between 128 and 512. The
display blocks preprocessed in the display buffer are transferred to the HMI via a configurable
upload buffer.
Maximum size of upload buffer is obtained by multiplying (MD28402
$MC_MM_ABSBLOCK_BUFFER_CONF[0] +
MD28402 $MC_MM_ABSBLOCK_BUFFER_CONF[1] + 1) by the block length configured in
MD28400 $MC_MM_ABSBLOCK.
The number of blocks before the current block is configured in
MD28402 $MC_MM_ABSBLOCK_BUFFER_CONF[0] and the number of blocks after the
current block is configured in MD28402 $MC_MM_ABSBLOCK_BUFFER_CONF[1].
Constraints
If the length of a display block configured in MD28400 $MC_MM_ABSBLOCK is exceeded,
this display block is truncated accordingly. This is represented by string "..." at the end of the
block.
For preprocessed cycles (MD10700 $MN_PREPROCESSING_LEVEL > 1), the display block
contains only axis positions.
Additional boundary conditions for the basic block display:
● Modal synchronized action blocks with absolute values are
not taken into account.
● The basic block display is deactivated during block search with or without computation.
● Polar coordinate programming is not shown in Cartesian system.
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
K1: Mode group, channel, program operation, reset response
For metric measurements
For inch measurements
Settable coordinate system for spindle display
resolution
For actual value display in WCS or SZS
9.14 Program control
593