C.1.5 Acyclical Parametrisation With Dpv1, Parameter Read/Write - Festo CPX Series Manual

C. Configuration with CPX node

C.1.5 Acyclical parametrisation with DPV1, parameter READ/WRITE

Slot 3: Indexed addressing of the objects
Index Name
16 Command box
17 Read Box
18 Write Box
Command box: Access to CMAX module parameters
Byte 1
Contents Slot no.
CMAX
100 + module number
Festo P.BE−CPX−CMA X−CONTROL−EN en 0908NH
When using the FB13, there are two ways of accessing the
data.
A direct task for reading/writing the module parameters
is possible, but only for modules 0...9 (data record
number (FB52/53) = 5 + 72 + 15*module number)
Generally valid is an indirect task via the command box,
which has the additional advantage of being able to write
the data as of a certain offset. In this way the bytes 0...7
from the startup parametrisation do not have to be over
written (slot = 100 + module number; index = 21)
Further information on acyclical parametrisation can be found
in the P.BE.CPX−FB13−... description
General access via command box
Length
Access
[byte]
4 r/w
64 r
64 w
2
Index module data
21
Record number (Siemens)
9
10
11
3 4
Offset data
8 0
C−13