Delta RMC151 - Manual (Page 625)

6 Communication
Within the STEP 7 program, the DPRD_DAT system function (SFC14) is used to get a
consistent copy of the Input Data. The following ladder shows SFC14 taking a copy of the
input data from the RMC and storing it into DB13. Notice that the LADDR input must
match the I Address from the hardware configuration. The value W#16#100 is the
hexadecimal equivalent of the input (I) address 256 from the Hardware setup slot table,
shown in step 10 above.
After the input data has been loaded into DB13 using the DPRD_DAT system function, the
S7 program can use this data and should set up the outgoing data in the output DB
(DB14 in this example). After the output data has been fully set up, the DPWR_DAT
system function (SFC15) is used to send a consistent copy of the data out over PROFINET
to the RMC. Again, the LADDR input parameter W#16#100 is the hexadecimal equivalent
of the output (Q) address 256 from the Hardware setup slot table, shown in step 10
above.
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