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Description
2.3 Data structures of FC 45
2.3
Data structures of FC 45
2.3
The following figure shows an example of a definition of several MOBY channels with the
related MDS commands and the user data.
Figure 2-2
Each FC 45 call points to a separate parameter data block (Params_DB, Params_ADDR),
which is defined by a UDT 10. The variables "command_DB_number" and
"command_DB_address" are stored in the UDT 10. These variables point to the MOBY
command which is to be executed with the MDS.
UDT 20 is used to define the MOBY command. Different commands can be defined by
calling UDT 20 several times (see Section "Command chaining"). The variables
"DAT_DB_number" and "DAT_DB_address" are defined in the UDT 20. This variable
definition generates the pointer to the user data. MDS data are stored there when they are
read out. When using a write command, the user must store his data before executing the
command.
2-6
Configuration scheme of FC 45
Function manual, Release 03/2006 , J31069-D0167-U001-A2-7618
FC 45
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