Adapting Message Frames Individually - Siemens SIMODRIVE 611U Product Information

Expert functions

5.4 Adapting message frames individually

5.4 Adapting message frames individually
Introduction
The drive may require additional functions, beyond the predefined message frames, for an
application. It is possible to expand the predefined message frame for this purpose. These
additional values can be used in the user program by the
MC_ReadPeriphery/MC_WritePeriphery technology functions or by other technology objects
(output cams). The "axis" technology object does not access this data.
Note
The described procedure concerns only the peripherals on the DP(DRIVE).
Proceure for expanding the message frame
● Find the message frame type required for your axis type from the table above.
● Then in HW Config, append the desired number of additional words after the last word of
Address in the DP(DRIVE)
peripheral image
0 - 63
>= 64
(Remark: As the message frame structure no longer corresponds to the selected message frame
type, another message frame or "no message frame" is displayed.)
● When creating the technology object in S7T Config, you must specify the originally
● In the SIMODRIVE 611U, you must generate the desired message frame structure
● A maximum of 16 process data words can be read or written.
Note
The data area for message frame extensions or for the data exchange with DPV0 slaves on
the DP(DRIVE) is limited in the technology CPU to 64 bytes (I/O address 0 - 63). The data
made available using this address area can be read or written in the user program using the
MC_ReadPeriphery or MC_WritePeriphery technology functions, respectively.
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the selected message frame.
Supplementary conditions for the address assignment for the message frame expansion:
selected message frame type. The technology object evaluates only the number of words
corresponding to the specified message frame type. The additional data can be
processed in the user program using the MC_ReadPeriphery and MC_WritePeriphery
technology functions or by other technology functions.
manually using the signal numbers. To do this, set parameter P922 to 0. You can use
parameter P915 Index 1 to 16 and parameter P916 Index 1 to 16 to enter the signal
numbers corresponding to the message frame.
Use
The data can only be processed using the MC_ReadPeriphery and
MC_WritePeriphery technology functions, e.g. to use the analog
output on the drive.
Technology objects cannot access this data.
The data can be used by other technology objects, e.g. to use the
integrated outputs of the drive as output cam outputs.
The data cannot be used in the user program.
Connecting the SIMODRIVE 611U to the Technology CPU
Product Information, 03/2008, A5E00272066-05