Siemens SIMATIC S5-115U, User Manual

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Communications Capabilities S5-115U Manual
Note
If you are using interprocessor communication flags and you use DB1 as parameter DB
for internal functions (see Chapter 11), then proceed as follows:
Overall
reset
Transfer integrated DB1 to the programmer
Insert interprocessor communication flag agreements (as described below) before
the DB1 parameters awaiting interpretation (see Chapter 11)
Modify and expand the other DB1 parameters (see Chapter 11)
Transfer the modified and expanded DB1 parameters to the PLC
The first three data words form the header ID. Always program them as follows:
DW 0 : KH=4D41 or KS=MA
DW 1 : KH=534B or KS=SK
DW 2 : KH=3031 or KS=01
After specifying an ID for the operand area, enter the numbers of all flag bytes used. Conclude
the interprocessor communication flag list with an end ID. The IDs are as follows:
KH = CE00 for interprocessor communication input flags
KH = CA00 for interprocessor communication output flags
KH = EEEE for end
You can use a total of 256 bytes as interprocessor communication flags. Number the bytes in
relation to the start address of the interprocessor communication flag area (FB0 to FB255). The
end identifier can be followed by the DB1 section in which internal functions are initialized (see
Chapter 11).
Example:
Define flags bytes FB10, FB20, and FB30 as interprocessor communication input flags. Define flag
bytes FB11 and FB22 as interprocessor communication output flags.
Assign DB1 as follows:
DW 0 : KH = 4D41
1 : KH = 534B Header ID
2 : KH = 3031 (SCREEN 01)
DW 3 : KH = CE00
4 : KF = +10 Interprocessor communication input
5 : KF = +20 input flags
6 : KF = +30
DW 7 : KH = CA00
8 : KF = +11 Interprocessor communication
9 : KF = +22 output flags
DW 10 : KH = EEEE End ID
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EWA 4NEB 811 6130-02b