Technical data

6-112 Bosch Rexroth AG | Electric Drives and Controls Rexroth VCP-Operating Concept | R911305038 / 01
INTERBUS MMICOM raw
6.8.4.3 Data Types
The data types specify how many bytes are assigned to a single vari-
able.
The access parameter determines the data length that is evaluated by
the operating device, and the MMICOM service used to handle the
variable.
For example: A text with ten characters that starts at the variable 100 (access W -
word) is made up of the variables 100 to 104.
Data
Type
Access to Length of
Single Vari-
able
Comment
BY Byte
(and Bit also)
1 Byte Next Byte
is Located 1 Address Hig-
her
W Word 2 Bytes Next Word
is Located 1 Address Hig-
her
W-2 Word 2 Bytes Next Word
is Located 2 Address Hig-
her
DW Double Word 4 Bytes Next Double Word
is Located 1 Address Hig-
her
DW-2 Double Word 4 Bytes Next Double Word
is Located 2 Address Hig-
her
DW-4 Double Word 4 Bytes Next Double Word
is Located 4 Address Hig-
her
Fig. 6-172: Data types, MMICOM
The following convention applies to data with a data length of more than
4 bytes (for example, alphanumeric texts, tables, polling area, status
messages):
Depending on the access type, the data is processed with the corres-
ponding one-, two-, or four-byte access. If there is other data to be pro-
cessed, it is assumed that this data is located under the next higher
variable number in each case.