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Description of the DP Functions, Data, and Error Codes
DP Base Programming Interface for CP 5613/CP 5614
204
C79000-G8976-C108-01
Length Bytes
Each bit in the length bytes has a special meaning.
Bit Meaning
0 to 5
Number of data units
0 (decimal) means: 1 data unit
63 (decimal) means: 64 data units
(for the length of the data units see bit 6)
6
Length
0 means: a data unit is one byte long
1 means: a data unit is two bytes long
7
Consistency
0 means: consistency over byte or word
1 means: consistency over the entire length
Example of a Special ID Format
The following table shows an example of a special ID format.
Octet Bits in the byte Meaning
1 11000011
Input/output,
3 bytes of vendor-specific data
2 1 1 0 0 1 1 1 1 Consistency, output, 16 words
3 1 1 0 0 0 1 1 1 Consistency, input, 8 words
4 to 6 Vendor-specific data
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