Siemens SIMATIC NET PROFIBUS Manual de Serviço descarregar pdf (Página 47)

Overview of the DP Base Interface

DP Base Programming Interface for CP 5613/CP 5614

C79000-G8976-C108-01

3.7 Typical Sequences

3.7.1 Initializing and Exiting the Master Mode

Initialization

The typical initialization of a CP 5613 or CP 5614 activates the CP and brings the

DP master to the OPERATE mode. The following steps are necessary:

Step Action Meaning

1 DP_start_cp CP is initialized.

2 DP_open Logon at the CP.

3 DP_get_pointer Exclusive access to the process image.

4 DP_set_mode(Stop) Change the master to the STOP mode.

5 DP_set_mode(Clear) Change the master to the CLEAR mode,

slaves are included in cyclic operation

according to the information in the

database.

6 DP_set_mode(Operate) Bring the master to the OPERATE

mode.

Productive Operation

The user program can access the data in the process image, trigger DP-V1 jobs

and fetch their confirmations as well as trigger other DP functions. The sequences

are described in greater detail on the following pages.

1 2 ... 42 43 44 45 46 47 48 49 50 51 52 ... 237 238

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Siemens SIMATIC NET PROFIBUS Manual de Serviço Página 47