Map Of Mdt User Data Area; Map Of Mdt Register Area; Map Of Mdt Status Register; Map Of Mdt Pointer Registers - Bosch Rexroth ID 40 Manual

5.1 Map of MDT user data area

The MDT user data is accessed through its map in the SLK. Data read from this SLK
memory area comes directly from the MDT. The SLK automatically creates a copy of
the MDT user data the first time this area is accessed. Data written to this area is
simultaneously written to the MDT.

5.2 Map of MDT register area

The MDT registers are accessed through their map in the SLK.
5.2.1

Map of MDT status register

Both MDT status bytes are read in accordance with Chapter 4.2.3.1 "MDT status
register".
The MDT status can be reset by entering any value to the map in the SLK.
5.2.2

Map of MDT pointer registers

The pointer values for the MDT can be read and modified using the map of the MDT
pointer registers (Chapter 4.2.3.2 "MDT pointers").
The following pointer functions are possible:
• Enter a 16-bit value in a pointer.
• The pointer values are shown in "Motorola" format, i.e., the high byte appears on
the low SLK address.
• Read pointer contents through read access to map.
• All three pointers can be both read and written by accessing the pointer map once.
5.2.3

Map of MDT ID code

The MDT ID code (Chapter 4.2.3.3 "MDT ID code") is read using the map. Write
access to this data block returns an error message, since the MDT ID code cannot be
edited.
5.2.4

MDT counter

The MDT counter can be used to count the workpiece pallets that pass by the SLK.
The SLK increases the MDT counter by one every time an MDT signs on to the SLK.
The 32-bit counter can be both read and written. Write access allows the counter
to be deleted (i.e., reset to 0) or set to any starting value. The counting range spans
from 0 to 4,294,967,295.
Reading or writing the value does not access the MDT. The counter is not stored on
the MDT.
5.2.5

MDT formatting

The MDT formatting fills one data block in the MDT user memory with a constant
value. This can be required in an application if, e.g., the content of the MDT should
be deleted or set to a specific value at a start station.
The MDT is formatted by write accessing the byte with the formatting value (byte 5).
The two other formatting parameters (start address and length of data block) have
to be configured at this point. It is recommended to send all parameters in one
command.
SLK memory structure
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