Festo Кабели и принадлежности - Manual (Page 104)

5. Parameter channel
5−4
Festo P.BE−SPC200−COM−PDP−E N en 0901c
5.2 Structure of the parameter channel (PKW)
The parameter channel serves for the transmission of paraĆ
meters. The parameter channel comprises the following:
Components of the
parameter channel Description
Parameter
identification (PKE) Component of the parameter channel which contains the task and reply
identifiers (AK) and the parameter number (PNU).
The parameter number serves for identifying or addressing the individual
parameter. The task or reply identifier (AK) describes the task or the reply
in the form of an identifier number.
Subindex (IND) Addresses an element of an array parameter (sub−parameter number)
Parameter value (PWE) Value of the parameter (doubleword or word)
If a task of the parameter processing cannot be carried out, a fault number
will be shown instead of the value in the reply telegram. The fault number
describes the cause of the fault.
The parameter channel consists of 8 bytes. The structure of
the parameter channel as a factor of the size or type of the
parameter value is shown in the following table:
PWE
type Byte
1 Byte
2 Byte
3 Byte
4 Byte
5 Byte
6 Byte
7 Byte
8
Double
word Parameter identifier
(PKE) Subindex
(IND) Reserved Parameter value (PWE)
Word Not relevant Parameter value
(PWE)
Fault 1) Not relevant Fault number 1)
1) Fault number in reply telegram if the parameter processing task cannot be carried out.