Siemens MOBY FC 56, Technical Description

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FC 56
J31069-D0155-U001-A0-7618
MOBY Commands
Before you can start a MOBY command with command_start, you must define it.
UDT 50 (commentary in English) or UDT 51 (commentary in German) is available
for the simple definition of a command.
Table 4-1 UDT 50 “MOBY FH CMD”
Address Name Type Starting
Value Commentary
0.0 STRUCT
+0.0 UID DWORD DW#16#0 MDS number (unique identifier)
+4.0 command CHAR ’R’ I:Format, B:Create, W:Write,
D:Delete
+5.0 sub_command_1 BYTE B#16#0 Additional command information 1
(e.g., attribute)
+6.0 sub_command_2 BYTE B#16#0 Additional command information 2
(e.g., option)
+7.0 sub_command_3 BYTE B#16#0 Additional command information 3
+8.0 filename ARRAY [1..8] File name of MDS name
*1.0 CHAR
+16.0 length DINT L#-1 Length of the data to be
processed (–1 = default)
+20.0 address_MDS WORD W#16#0 Start address
+22.0 DAT_DB_number INT 58 Number of the data block
+24.0 DAT_DB_address INT 0 Start address in data block
+26.0 QUEUE_DB_number INT 0 Number of the data block (only
for QUEUE-READ)
+28.0 QUEUE_DB_address INT 0 Start address in the data block
(only for QUEUE-READ)
=30.0 END_STRUCT
The “current value” of the variables can be adjusted with the editor in the data view
of the DB or STEP 7 application program.
Remember that the current values may only be changed when no command is
active (ready = 1).
UID (unique identifier)
The UID parameter does not have to be provided with a correct value unless
MOBY_mode = 6 is set (see chapter 3.1).
Value range of UID:
Value Meaning
00000000 Any MDS. If more than one MDS is in the field, an error
message is output.
00000001 to FFFFFFFF UID of an MDS. The correct value must be obtained before-
hand with the GET command (see chapters 4.2.14 and 5.7).
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