ID 442710.00 28WE KEEP THINGS MOVING
More about PROFINET?
6
Operation manual PROFINET
Parameters are generally structured as follows:
The axis number identifies parameters that are configured in each axis, for
example 2.A150 cycle time.
Global parameters are available once for each drive controller, for example
A35 Low voltage limit.
A line distinguishes between individual parameters within a group.
The element subdivides a parameter into subfunctions.
The last place identifies the individual bits, for example in control words.
Calculate parameters
All STOBER-specific drive controllers are sorted as communication objects in
the parameter number range 2000
hex
– 5FFF
hex
.
A parameter number (PNU), an axis or a subindex is specified as follows.
Parameter number
Calculation formula:
PNU
dec
= 8192 + 512 * group number + line number
The PNU must generally be converted from decimal to hexadecimal for use in
the IO controller.
The following numbers apply for groups:
Axis
number of the logical or physical axis.
The value range 0 – 3 corresponds to the axes 1 to 4 for axis parameters. The
axis number is 0 for global parameters.
Subindex
element number in combination with record or array.
The subindex is 0 for parameters that are not a record or array.
6.4.3.2 Use acyclic communication services
To transfer acyclic parameter data, PROFINET provides the "Write data record"
and "Read data record" functions.
The functions are controlled via the SIMATIC function blocks WRREC and
RDREC.
6.4.3.2.1 WRREC and RDREC
WRREC and RDREC are special "instructions", i.e. code blocks that contain a
certain number of elements in a clearly defined sequence.
Both blocks are asynchronously operating instructions to either transfer a
"RECORD" data record to an address defined in "ID" (WRREC) or to read a
data record from the address defined in "ID" (RDREC).
ABCDEFGH I JKLM
0123456789101112
NOPQRSTUVWXYZ
13 14 15 16 17 18 19 20 21 22 23 24 25
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