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Description of the DP Functions, Data, and Error Codes

DP Base Programming Interface for CP 5613/CP 5614

158

C79000-G8976-C108-01

4.3.8 Querying Information about DP Slaves

Uses of the DP Slave Information

In the process image of the CP 5613/CP 5614, there is a memory area from which

you can read out the configuration data for DP slaves, for example, to display it in

your user program.

Example

"p" is a pointer to the process image that your user program obtained with the

"DP_get_pointer" call. To display this information in a simple application, you would

write a program similar to that below:

printf("Slave type -> %d",

p->info_watch.slave_info[5].slave_type);

/* 0 means slave is not configured */

/* 1 means slave is configured */

/* 2 means DP-V1-compliant slave is configured */

printf("number of output bytes -> %d",

p->info_watch.slave_info[5]. slave_out_byte);

printf("number of input bytes -> %d",

p->info_watch.slave_info[5]. slave_in_byte);

printf("In database -> %d",

p->info_watch.slave_info[5]. slave_in_database);

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Siemens SIMATIC NET PROFIBUS Manual de servicio Pagina 158