Example: An S5-115U with an IM 308C master would use the following: For Level products: Inputs: 3 address blocks of 16, 16, and 10 words Outputs: 1address block of 13 words For Mass Dynamics products: Inputs: 3 address blocks of 16 words, 16 words, and 2 words 1 Outputs: 2 address blocks of 16 and 3 words Notes: • Data is read and written with the most significant byte (MSB) first. • The address and size of the Reads and Writes in the PLC must match the Siemens Milltronics device (see above). If the PLC size is smaller than the Siemens Milltronics size, an error will be displayed and only the first portion of the data will be read.
• PROFIBUS DP diagnostic bytes are not supported, however, some diagnostic information can be accessed via reading and writing the data areas. See Application Layer on page 19 . Map Element Selection P762 Map Element Selection parameter P762 allows you to select what elements to include in the Input and Output Tables. By selecting only the data required, you can reduce the amount of data being transferred over the bus. Nots: • P762 should only be modified by an advanced user who wants to limit the amount of data being transferred. See Appendix A – Reducing the amount of data being transferred over the Bus on page 46 for more details. • Changes do not take effect until after a power cycle.
The chart on page 16 gives the default values for this parameter. If the default values are used then the configuration and Data Maps (see pages 24 and 30) in the main body of this manual remain correct. If any of these values is changed, then the Data Maps will be shortened and the configuration will change. Please see Appendix A on page 46 for details on how to use P762. Communications Setup 1. This applies to BW500/SF500 units that have firmware V 3.05 or greater and have all the values of P762 turned on--it does not apply to older units. 7ML19981AQ03 SmartLinx PROFIBUS DP – INSTRUCTION MANUAL Page 15