Festo Электромотор MTR-DCI - Manual (Page 209)

B. Supplementary information
B-3
Festo P.BE-MTR-DCI-PB-EN en 1209a
B.1 Parameter assignment
B.1.1 Festo Parameter Channel (FPC) for cyclical data (I/O data)
The “Festo Parameter Channel” is used for the transmission
of parameters. It offers the following advantages:
Component Description
Parameter identifier ParID Contains:
– Parameter number PNU: identifies a parameter.
– Request/response identifier (AK): describes the task/response in
the form of a code number.
Subindex (IND) Addresses an element of an array parameter.
Parameter value (ParVal) Value of the parameter.
If a parameter processing request cannot be carried out, a fault
number will be shown in the response telegram instead of the value.
The fault number describes the cause of the fault.
Tab. B/1: Components of the parameter channel
The Festo Parameter Channel FPC 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 ParID ParVal
I data 0 IND ParID ParVal
IND Subindex
ParID Parameter identifier: PNU and AK
ParVal Parameter value:
– With double word: bytes 5...8
– With word: bytes 7, 8
– With byte: byte 8
Tab. B/2: Structure of Festo Parameter Channel (FPC)