Festo Контроллер позиционирования CPX-CMAX - Manual (Page 293)

6. Parametrisation
6−3
Festo P.BE−CPX−CMA X−CONTROL−EN en 0908NH
6.1 Festo Parameter Channel (FPC)
The FPC is used for transmitting parameters. The PLC sends
a request to the CMAX consisting of a parameter number,
a subindex, a value and a task identifier. The CMAX responds
with the PNU, the subindex, the value and a response
identifier. This process takes several bus cycles.
FPC
Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7
Request Subindex Parameter identifier Parameter value
Response Subindex Parameter identifier Parameter value
Tab. 6/1: Structure of FPC
Parameter identifier
Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Request Request Identifier Parameter number
Response Response identifier Parameter number
Tab. 6/2: Structure of parameter identifier
Component AbbreviaĆ
tion Description
Parameter identifier ParID 16 bit identifier, consisting of ReqID/ResID and parameter
number.
Request identifier ReqID Request identifier:
Reading value, Changing value, ...
Response identifier ResID Response identifier
Value transmitted, error ...
Parameter number PNU Parameter number ć for addressing a parameter.
Subindex IND Subindex ć for addressing an array element.
Parameter value Value Parameter value (in the event of an error the error number as
a response)
Tab. 6/3: FPC components