Festo Электромотор MTR-DCI - Manual (Page 174)

5. Commissioning
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Festo P.BE-MTR-DCI-DN-EN en 1209a
5.7 The Festo Parameter Channel (FPC)
5.7.1 Structure of the cyclic I/O data (FHPP-FPC)
The parameter channel serves for the transmission of para-
meters. The parameter channel comprises the following:
Components Description
Parameter identifier
(PKE) Parameter channel component which contains the request and response
identifiers (AK) and the parameter number (PNU).
The parameter number serves for identifying or addressing the individual
parameter. The request or response identifier (AK) describes the request
or response as appropriate 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.
If a task of the parameter processing cannot be carried out, an error
number is shown instead of the value in the response telegram. The fault
number describes the cause of the fault.
Tab. 5/1: Components of the parameter channel (FPC)
The parameter channel consists of 8 octets. The structure of
the parameter channel as a factor of the size or type of the
parameter value is shown in the following table:
FPC
Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8
O data 0 IND ParID (PKE) Value (PWE)
I data 0 IND ParID (PKE) Value (PWE)
IND Subindex – for addressing an array element
ParID (PKE) Parameter Identifier – consists of ReqID or ResID and PNU
Value (PWE) Parameter Value, parameter value:
– With double word: Bytes 5...8
– With word: Bytes 7, 8
– With byte: Byte 8
Tab. 5/2: Structure of parameter channel