User Manual

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Siemens Building Technologies DP/LON link CK1N9832en
Landis & Staefa Division 09.03.2001
Features
The DP/LON link is a DP slave and maps data objects of the LON device in the I/O
area of the SIMATIC S7. The question of which LON data objects are connected to the
Profibus is defined by the "Typical" for the required LON device application in the
SICLIMAT Engineering Manager. There is no need for SNVT LON network variable
bindings to the communications interface.
The DP/LON link polls all the connected LON devices cyclically and transmits any
change-of-state or any changes in the data object at the time of polling. The
PROFIBUS master, the SIMATIC S7, is thus able to read or write data objects on the
LON bus.
The SICLIMAT OP7/17 can be connected to the SIMATIC S7 for local operation and
monitoring of LON bus data points.
The SICLIMAT Engineering Manager EM currently holds the most common DESIGO
RX applications.
With the DP/LON link, the number and type of LON data points to be transmitted to the
PROFIBUS is determined by the typical applications defined in the EM ("Application
Typicals"). The number of connected LON devices is based on the available memory
resources of the CPU and the maximum admissible cycle time for polling.
Engineering Manager "Application Typicals" can be created for new DESIGO RX
applications or LON third-party devices.
The DESIGO RX objects store their data in standard SICLIMAT X objects such as
Messages, Switch commands, Measured values and Setpoints. This ensures that all
the functions of SICLIMAT X are available.
Engineering
The most common DESIGO RX applications are available in the form of "Typicals"
(typical applications) in the SICLIMAT Engineering Manager. The relevant "Typicals"
are copied into the project, after which the parameters LON-Node_ID, LON-Domain_ID
and LON-Subnet_ID are set. There is no need for SNVT (data point) LON network
variable bindings to the communications interface.
The DP slave address is preset to 3, and can be set with a LON service terminal. The
PROFIBUS I/O area is a fixed 64 bytes. The I/O address range is set in the "Typical"
header and must be the same as the range engineered in the SIMATIC Manager. The
DP/LON link is integrated into the SIMATIC Manager via a PROFIBUS Device Source
Data file.
On the LON bus side, the DESIGO RXT tool is used to engineer the DESIGO RX
individual room controllers, download the application and commission the controllers.
For engineering guidelines and a guide to the installation principles for DESIGO RX in a
LON network, refer to the relevant Landis & Staefa documentation. We recommend
that the LON network should be engineered as a self-contained segment with a
maximum of 63 bus users.