Siemens SIMATIC NET PROFIBUS Manual de servicio Pagina 68

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Description of the DP Functions, Data, and Error Codes
DP Base Programming Interface for CP 5613/CP 5614
68
C79000-G8976-C108-01
4.1.1 Overview of the Functions
Administrative Functions
Name Purpose
DP_start_cp
Downloads the firmware and the database to the
CP 5613/CP 5614.
DP_open Logs on a DP user program, assigns a user handle.
DP_get_pointer Requests a pointer to the process image.
DP_init_sema_object This function initializes a semaphore at which your
user program can wait for the arrival of events.
DP_delete_sema_object This function clears a semaphore again.
DP_release_pointer Releases the pointer to the process image.
DP_close The DP user logs off.
DP_reset_cp Stops the CP firmware.
Standard DP Functions
Name Purpose
DP_set_mode
This function sets the required DP mode (OFFLINE,
STOP, CLEAR, OPERATE).
DP_slv_state This function activates or deactivates a slave
explicitly and can be used to change the
AUTOCLEAR property.
DP_read_slv_par
This function reads out the parameters of a DP slave
from the database.
DP_global_ctrl This function sends a global control command to one
or more slaves.
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