General Information On Read And Write-Accessing An Mds - Siemens Moby J31069-D0126-U001-A6-7418 Bedienungsanleitung

R 05/07
4.2.1 General Information on Read and Write-Accessing
an MDS
The MOBY D and MOBY E MDSs use block-oriented data accessing. A read
or write-access to an MDS is only possible at the beginning of a block. One
block contains 16 bytes (or 10 hex) with MOBY E. Thus, the start addresses
for MDS processing to be entered on the STG hand-held terminal PRO are:
00, 10, 20, 30 hex and so on.
With MOBY D a block has a length of 4 bytes (I-Code, Tag-it) or 8 bytes (my-d).
The start addresses are:
00, 04, 08, 12 hex ... (I-Code, Tag-it) or
00, 08, 10, 18 hex ... (my-d).
With the MOBY D/E, the TagId on the display is automatically updated to the
current value after the read/write access.
Note
ECC mode can only be set on the MOBY I hand-held terminal.
ECC mode cannot be used with MOBY D/E.
STG Hand-Held Terminal PRO
(5)J31069-D0126-U001-A6-7418
The "MOBY D/E/I" Programs
However, you can also specify any start ad-
dress. This will be accepted by the STG
and corrected to the next lower block begin-
ning. The corrected address is indicated for
the operator in a window and must be
acknowledged.
An additional window appears if you change
data in the editor and then attempt to read an
MDS. The window tells you that the data
which you have just modified may be over-
written again with the "read MDS" command.
You can retain or reject the modified data in
the editor, or you can terminate the command
completely.
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