BECKHOFF BK3xx0 - Manual (Page 83)

Notes on the Documentation
Fieldbus Components 81
Setting via UserPrmData
The Bus Coupler's reset is carried out automatically if the DP buffers are set using UserPrmData:
Byte Bit Description
12 4-
7 15 dec or 0xF hex: the maximum DP buffer lengths are changed using the values from
UserPrmData 37-40
37 0-
7 maximum length of input data
38 0-
7 maximum length of output data
39 0-
7 maximum length of diagnosis data
40 0-
7 maximum length of configuration data
Example 1: Not enough configuration data
128 bytes input
128 bytes output
80 bytes CfgData
48 bytes diagnosis data
Example 2: Not enough input data
160 bytes input
96 bytes output
64 bytes CfgData
64 bytes diagnosis data