Beckhoff EL6731 Documentation page 122

Parameterization and commissioning
5.1.8.6 Configuration Data - CfgData
The CfgData describes the structure and length of the input and output data that is to be cyclically
exchanged via Data_Exchange. There follows a description of the DP configuration data bytes
Bits 4-7 Meaning
0000B Module without data. Bits 0-3 indicate how many bytes of manufacturer-specific data are still to
follow.
0001B Inputs of type byte, with no consistency. Bits 0-3 contain the length of the input data minus 1 (i.e.
bits 0-3 = 0000B corresponds to a length of one byte, while bits 0-3 = 1111B corresponds to a
length of 16 bytes)
0010B Outputs of type byte, with no consistency. Bits 0-3 contain the length of the output data minus 1
(i.e. bits 0-3 = 0000B corresponds to a length of one byte, while bits 0-3 = 1111B corresponds to
a length of 16 bytes)
0011B Inputs and outputs of type byte, with no consistency. Bits 0-3 contain the length of the input or
output data minus 1 (i.e. bits 0-3 = 0000B corresponds to a length of one byte, while bits 0-3 =
1111B corresponds to a length of 16 bytes)
0100B A special identification format for inputs. A byte follows that describes the associated input data
(see below). Bits 0-3 indicate how many bytes of manufacturer-specific data are still to follow.
0101B Inputs of type word, with no consistency. Bits 0-3 contain the length of the input data minus 1 (i.e.
bits 0-3 = 0000B corresponds to a length of one word, while bits 0-3 = 1111B corresponds to a
length of 16 words)
0110B Outputs of type word, with no consistency. Bits 0-3 contain the length of the output data minus 1
(i.e. bits 0-3 = 0000B corresponds to a length of one word, while bits 0-3 = 1111B corresponds to
a length of 16 words)
0111B Inputs and outputs of type word, with no consistency. Bits 0-3 contain the length of the input or
output data minus 1 (i.e. bits 0-3 = 0000B corresponds to a length of one word, while bits 0-3 =
1111B corresponds to a length of 16 words)
1000B A special identification format for outputs. A byte follows that describes the associated output
data (see below). Bits 0-3 indicate how many bytes of manufacturer-specific data are still to
follow.
1001B Inputs of type byte, with consistency. Bits 0-3 contain the length of the input data minus 1 (i.e.
bits 0-3 = 0000B corresponds to a length of one byte, while bits 0-3 = 1111B corresponds to a
length of 16 bytes)
1010B Outputs of type byte, with consistency. Bits 0-3 contain the length of the output data minus 1 (i.e.
bits 0-3 = 0000B corresponds to a length of one byte, while bits 0-3 = 1111B corresponds to a
length of 16 bytes)
1011B Inputs and outputs of type byte, with consistency. Bits 0-3 contain the length of the input or
output data minus 1 (i.e. bits 0-3 = 0000B corresponds to a length of one byte, while bits 0-3 =
1111B corresponds to a length of 16 bytes)
1100B A special identification format for inputs and outputs. A byte first follows that describes the
associated output data, and then one describing the associated input data (see below). Bits 0-3
indicate how many bytes of manufacturer-specific data are still to follow.
1101B Inputs of type word, with consistency. Bits 0-3 contain the length of the input data minus 1 (i.e.
bits 0-3 = 0000B corresponds to a length of one word, while bits 0-3 = 1111B corresponds to a
length of 16 words)
1110B Outputs of type word, with consistency. Bits 0-3 contain the length of the output data minus 1 (i.e.
bits 0-3 = 0000B corresponds to a length of one word, while bits 0-3 = 1111B corresponds to a
length of 16 words)
1111B Inputs and outputs of type word, with consistency. Bits 0-3 contain the length of the input or
output data minus 1 (i.e. bits 0-3 = 0000B corresponds to a length of one word, while bits 0-3 =
1111B corresponds to a length of 16 words)
If the first byte has the type "special identification format", then the second or third bytes have the following
meaning:
122 Version: 2.8 EL6731