Festo MTR-DCI, Руководство пользователя

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B. Supplementary information
B−10
Festo P.BE−MTR−DCI−IO−EN en 0606b
All values are transferred in hexadecimal figures; 1 character
represents 4 bits; it is known as a tetrad <Tn>. The first tetrad
transferred contains the higher−value bits of the value.
General information: Tetrad <Tn> contains the bits b
n
...b
n+3
.
Example:
UINT8
Dec. 26
Hex 1 A
Bin 0 0 0 1 1 0 1 0
b
7
b
6
b
5
b
4
b
3
b
2
b
1
b
0
Tetrad T
4
Tetrad T
0
Checksum <PS> The checksum is formed from the sum of all sent bytes and
shortened to 1 byte (modulo 256).
The other station must compare the sent command with the
ecco" of the controller and process the checksum.
Checksum
Syntax IIIISS:<Checksum>
Format 2 hexadecimal figures
Type UINT8