Festo Контроллер позиционирования CPX-CMAX - Manual (Page 294)

6. Parametrisation
6−4
Festo P.BE−CPX−CMA X−CONTROL−EN en 0908NH
6.1.1 Request identifiers, response identifiers and error numbers
Description ReqID
Request
ResID (+)
with response
ResID (ć)
in the event of Request with response in the event of
an error
No request 0 0 0
Read parameter value 6 5 7
Change parameter value 8 5 7
Tab. 6/4: Request identifiers and response identifiers
Rules:
ć There are the data types integer, character (char) and
bitfield.
ć Each parameter value is transmitted as a 32−bit value.
ć A string is an array of characters that can only be transĆ
mitted individually via the cyclic channel. The value NUL
(=0x00) is interpreted as the string end. A PLC must alĆ
ways transmit the zero as the last character.
ć Simple variables have no subindex.
The transmitted subindex can have the values 0 and 1.
The value 0 corresponds to not used". It is recommendĆ
able to set the subindex to 1 as if the parameter were an
array with a component. Values that are > 1 are rejected
with error 3.