User Manual

B. Parametrizing via field bus
B−15
Festo GDCP−SFC−LACI−DN−EN en 0812NH
B.2 Parameterisation via FPC
B.2.1 Structure of the Festo Parameter Channel (FPC)
The Festo Parameter Channel" is used for transmitting
parameters. It consists of 8 octets:
FPC
Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8
O data 0 IND PKE (ParID) PWE (ParVal)
I data 0 IND PKE (ParID) PWE (ParVal)
IND Subindex
PKE Parameter identifier: PNU and AK
PWE Parameter value:
for double word: bytes 5 ... 8
for word: bytes 7, 8
for byte: byte 8
Tab.B/2: Structure of the Festo parameter channel (FPC)
Element
Description
Parameter identifier ParID Contains:
 Parameter number PNU: Identifies a parameter
 Task or reply identifier (AK): describes the type of task/reply
Subindex (IND) Addresses an element of an array parameter
Parameter value ParVal Value of the parameter
If a task cannot be carried out, an error number will be transmitted in
the reply (see section B.2.2)
Tab.B/3: Parameter channel elements