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Overview of the DP Base Interface

DP Base Programming Interface for CP 5613/CP 5614

C79000-G8976-C108-01

3.9 Typical Sequences for the CP 5614 Slave Module

3.9.1 Initialization and Shutdown of the Slave Module in the "Simple"

Mode

Initialization

The initialization of the CP 5614 in the "Simple" mode activates the CP and

initializes the slave module so that it can be brought to the productive state by the

master. The following steps are necessary:

Step Action Meaning

1 DP_start_cp CP is initialized.

2 DPS_open Initialization of the slave module:

The "DPS_SM_SIMPLE" bit is set in

the "slave_mode" parameter, the

expected parameter and configuration

data are in the "init_data" parameter.

3 DPS_start Start the slave module

4 DP_get_pointer Exclusive access to the process image.

Productive Operation

The user program can read and write the data in the process image.

Shutdown Sequence

To shut down the CP, the slave module changes to the OFFLINE mode and

finishes by stopping the CP:

Step Action Meaning

1 DPS_stop Bring the slave to the OFFLINE state

2 DP_release_pointer Enable access to the process image.

3 DPS_close Log off on the slave module

4 DP_reset_cp Stop the CP.

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Siemens SIMATIC NET PROFIBUS Wartungshandbuch Seite 59