Changing Communication Addresses Via The User Program; Application Examples For Setting The Communication Address - Siemens SIMOTION Function Manual

Overview of the functionality of modular machines

2.2 Changing communication addresses via the user program

The SIMOTION_1 device delivers a bus cycle clock to the connected subnet via an isochronous
communication interface that has been configured as a DP master (in PROFIBUS DP) or as
a sync master (in PROFINET IO).
The SIMOTION_2 device should be synchronized with this higher-level bus cycle clock. For
this reason, the communication interface reached by the bus cycle clock in the SIMOTION_1
device must be configured as a DP slave (in PROFIBUS DP) or as a sync slave (in
PROFINET IO). General information about synchronizing a SIMOTION device with the bus
cycle clock (Page 25) provides an overview of cycle clock generation and synchronization in
PROFIBUS DP and PROFINET IO.
Isochronous DP master interfaces in the SIMOTION_2 device can be synchronized with the
higher-level bus cycle clock and the cycle clock delivered to lower-level drives. The
synchronization behavior of the SIMOTION_2 device depends on whether or not the
PROFIBUS DP interfaces have been configured as isochronous DP masters:
● No further isochronous DP master interface available: The synchronization of the device
● At least one isochronous DP master interface is available (for example in SIMOTION D).
2.2 Changing communication addresses via the user program
Nodes are clearly identified within a communication network by means of, for example
● The PROFIBUS address of the interface in PROFIBUS DP
● The device name (NameOfStation) in PROFINET IO
● The IP address of the interface on Ethernet
These communication addresses are set during configuration with the help of the SIMOTION
SCOUT engineering software. They can be changed later by a user program and the
requirements customized at each respective destination.
Some application examples for this functionality are described in the following.
2.2.1

Application examples for setting the communication address

Base machine with several modules
A machine consists of a base machine (base_machine) with several machine modules
(module_1 to module_n). The base machine and all modules are controlled via separate
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(with the internal cycle clocks) occurs automatically when the higher-level bus cycle clock
has been recognized at the corresponding slave interface. See Synchronizing a SIMOTION
device without an isochronous DP master interface (Page 31)
Synchronization of the isochronous DP master interfaces is controlled by the user and
occurs when the user calls up a system function. Synchronization of the device varies,
depending on whether the higher-level bus cycle clock is fed in via a PROFIBUS DP
interface or a PROFINET IO interface. See Synchronization of a SIMOTION device with
an isochronous DP master interface (Page 33)
Basic Functions for Modular Machines
Function Manual, 04/2014