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7.7 Addressing data in the ID 40 system
The
SLK address
is needed to read and write data through the fieldbus both on the
MDT and the SLK, and is shown as a 32-bit value in hexadecimal format.
Example: 0x000002C0
A
data block
consists of the SLK address and a byte count. The SLK address is the
start address, and the byte count determines the area length from the start address.
It is written as
address/byte count
.
The SLK address is always shown in hexadecimal format, whereas the byte count
is always in decimal format.
Example:
Four bytes should be read starting from address 0x000002C0, so the data block is
0x000002C0/4
Fig. 24:
Start address
0x000002C0
Byte 1
Next free address
0x000002C4
Byte 2
Byte 3
Byte 4
No. of bytes 4
Example of data block with length of 4
Do not confuse the SLK address with the fieldbus node number.
The
SLK address ranges
are listed in Chapter 7.4 “SLK address table”.
PROOF COPy 1 | 20.05.2014 | FOR INTERNAL USE ONLy
