BECKHOFF BC3100 - Manual (Page 32)

PROFIBUS bus terminal controller BC3100
32 BC3100
Configuration
The configuration data to be transferred with the Chk_Cfg service defines
which process data is exchanged with the Data_Exchange service.
Identifier Description
0xB1 2-byte PLC interface
2-byte diagnostic interface When the 2-byte diagnostic interface is activated, the next identifier in the
configuration data must be assigned as follows, as otherwise this identifier
is dropped:
Identifier Description
0xB1 2-byte diagnostic interface
Auto-configuration
Assignment of terminals When using auto configuration, only those terminals may be considered
that have been assigned to the DP process image.
Digital terminals The data of all digital input or output terminals is combined in one byte
array each in the sequence of the slots. The following identifiers can be
used for digital data:
Identifier Description
0x1n (n+1)-byte digital inputs
0x2n (n+1)-byte digital outputs
0x3n (n+1)-byte digital inputs and outputs
These identifiers can be assigned as required so that the total of the input
or output bytes each corresponds to the existing data length of digital
inputs and outputs (rounded up to 1 byte).
As the digital data is transferred after all analog data, the digital identifiers
must be defined after all analog identifiers.
Analog terminals For each channel, the analog terminals have 8 bits of control or status data
and user data. These terminals belong to the intelligent terminals and
support register communication (8 bits of control or status data, 16 bits of
I/O data per channel). Specific coding in the control or status data defines
whether the first 16 bits of the user data are to be interpreted as register
communication I/O data.
One code must be defined for each analog terminal or each analog
channel. Their sequence depends on the slots.
There are up to 5 different codes per channel for mapping them in the DP