Technical data

R911305038 / 01 | Rexroth VCP-Operating Concept Electric Drives and Controls | Bosch Rexroth AG 6-123
PROFIBUS-DP raw
User Data
The user data are located from byte 5 onwards to end of the telegram.
Reading and Writing Bytes
Depending on the telegram length and access, up to 28 bytes of user
data can be transferred during reading and writing operations.
When bytes are being read and written, the user data appears in the
telegram as of byte five.
Reading Bits
When the system reads bits, it reads a byte, word or double word,
based on the address width of the data area to be read.
The operating device masks out the requested bits, and displays the
data in line with the display settings.
Writing Bits
Only an individual bit is set or deleted.
The controller receives a bit mask and link information from the opera-
ting device via the request telegram. The bit is set or deleted in the tar-
get address using the bit mask and the link information.
The byte order of the bit mask for word addresses is oriented to the
protocol parameters specified for the byte order.
Byte Content
5Bit Mask
6 Logical Operation
0 = AND
1 = OR
Fig. 6-182: Writing to a byte address
Byte Content
5Bit Mask LOW
6Bit Mask HIGH
7 Logical Operation
0 = AND
1 = OR
Fig. 6-183: Writing to a word address