Siemens SIMATIC ET 200M Operating Instructions Manual page 238

Technical Specifications
10.4 Technical specifications of the IM 153-4 PN interface module
Changing IO devices during operation (changing partner ports)
Functionality of a PROFINET device. If the IO controller and the IO device support this
function, then an IO device port "changing partner ports" from other devices can be assigned
by means of configuration, so that at all times via this port at a specific time communication
can take place with one of these changing IO devices. However, it is only the changing
device that may be physically linked with the changing port that is currently being
communicated with.
This functionality is, for example, essential for tool change when using industrial robots.
To realize the quickest possible tool change, it is also practical to configure a "prioritized
startup" for the devices in the tools together with setting a fixed transmission mode with
disabled autonegotiation and specific wiring rules.
For further information please refer to the STEP 7 Online Help and the "PROFINET System
Description (http://support.automation.siemens.com/WW/view/en/19292127)" manual.
Dimensioned drawing
Figure 10-4
236
Dimensioned drawing of the IM 153-4 PN interface module
Operating Instructions, 12/2008, EWA-4NEB780600602-08
ET 200M