Configuring Docking Systems - Siemens SIMATIC ET 200AL System Manual

Distributed i/o system

Hide thumbs Also See for SIMATIC ET 200AL:

Table of Contents

5.11 Docking systems

● After the feedback "IO device activated", you can access the IO device by means of direct

● Call the "D_ACT_DP" instruction to activate and deactivate the IO device as close as

possible to the start of the OB 1 cycle.

Number of alternating IO devices during operation ("alternating partner port") - number of

docking units

If you wish to achieve the shortest possible tool changeover times, you must observe the

following points that are dependent on the CPU or the CP that is being used:

• Only those IO devices that have been configured with the PROFINET function

• Only a limited number of IO devices can be activated at the same time. This number

Example: An S7-CPU 1516-3 PN/DP can operate a maximum of 32 IO devices with

prioritized startup and can simultaneously activate 8 IO devices by means of

Therefore, for a scheduled optimum use, a docking unit should include no more than 8 IO

devices and no more than 32 IO devices should be used in all the alternating docking

Configuring docking systems

The possible connections to the individual IO devices must be configured in STEP 7.

Procedure in STEP 7

1. Configure your system as usual, but do not yet configure the topological interconnections

of the individual PROFINET devices.

2. Navigate to the "Topology view" tab.

3. Select the port which you want to operate with alternating partners during operation.

4. Navigate to the "Properties" tab of the inspector window and select "Port interconnection"

in the area navigation.

"Prioritized startup" can start up in an optimized fashion. The number of IO devices

with configuration for this PROFINET function is restricted.

depends on the available "D_ACT_DP" resources. A docking unit should not contain

more than the corresponding number of IO devices. If more IO devices are operated in

a docking unit, the IO devices must be activated one after the other, which takes

correspondingly longer.

PROFINET with STEP 7 V15

Function Manual, 12/2017, A5E03444486-AH

Table of Contents