Festo Электромотор MTR-DCI - Manual (Page 282)

C. The Command Interpreter (CI)
C-8
Festo P.BE-MTR-DCI-DN-EN en 1209a
Note
Direct transfer of values via the serial interface with CI
commands always takes place in the base system and
requires conversion into increments.
All parameters are always saved in increments in the con-
troller and are not converted into the relevant measuring
system until they are written or read. All physical variables
(position, speed and acceleration) must be converted into
increment values before they can be transferred.
Further information on converting can be found in
chapter A.4
All values are transferred in hexadecimal figures; 1 character
represents 4 bits, and is known as a tetrad . The first
tetrad transferred contains the higher-value bits of the value.
Generally: tetrad contains the bits b
n ...b n+3
Example: UINT8 (2H)
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