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Telegram heading (always present)
0
1
2/3
res.
res.
res.
ABS
EMPF
LFN
CC
reserved for sequence number
(The filehandler transmits the parameter LFN from the command in the acknowledgement. It is not
evaluated by the filehandler)
reserved for receiver recognition* (presently always 00)
reserved for sender identifier* (MOBY I: code 'F' is reserved for STG )
* The filehandler interchanges sender and receiver identifiers.
Figure B-6
General telegram layout
FC 56
J31069-D0155-U001-A0-7618
4/5
6/7
8/9
Command
ADB
DBN
CI
Current data block number (dual)
Total number of data blocks to be transmitted (dual)
Command index
'I'
:
MOBY I command from ASM
xx
:
MOBY I status byte: acknowledgement from ASM
7 6 5 4 3 2 1 0
reserved
(always 00)
1 = WARNING: MDS was outside the transmission window
1 = WARNING: File read had length = 0.
1 = An MDS with a new directory has entered: the bit is set when the filehandler
has carried out a read operation on the complete MDS directory. In some
applications, the new directory can be backed up by the MOVE command.
The result of the last command will be delayed by the directory operation.
Command codex
'I'
:
FORMAT
(Format)
'B'
:
CREATE
(Open file)
'Q'
:
QUEUE-WRITE
(Set up complete data medium)
'E'
:
QUEUE-READ
(Read several files)
'U'
:
UPDATE
(Write complete file)
'W' :
WRITE
(Write)
'R'
:
READ
(Read)
'D'
:
DELETE
(Delete)
'Y'
:
ATTRIB
(Set access rights for a file)
'C'
:
COVER
(Protect MDS structure)
'G'
:
DIR
(Read file directory)
'F'
:
MDS-STATUS
(Request MDS status)
'K'
:
END
(Conclude communication with MDS)
'T'
:
TRACE
(absolute read)
'M'
:
MOVE
(Read MDS directory out from ASM)
'L'
:
LOAD
(Transmit directory to ASM)
'A'
:
SET-ANT
(Turn antenna on/off)
'P'
:
GET
(Read UIDs of all MDSs)
'S'
:
ASM-STATUS
(ASM status request)
'X'
:
RESET
(Reset Filehandler)
'N'
:
NEXT
(Process Next MDS)
Programming MOBY-ASM on PROFIBUS-DP-V1
10
DBL
User data
The user data depends on the command
(Cf. appendices B.5 and B.6.)
Length of user data following (dual)
1 = Command terminated with error; the user
data contains error information. See
section 9.3.
1 = Only with ECC: data from the MDS has been
corrected and is OK.
1 = The RAM battery is poor or exhausted (always
set for EEPROM MDS).
1 = Aux. battery is poor or exhausted (only valid for
MDS 507; otherwise always 1).
during command processing.
... 239
B-9
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