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1.
INTRODUCTION TO MODBUS AND PRODUCT
Thank you very much for purchasing our Lumiplus with MODBUS-RTU features. This manual is
intended for professional installer, if you are not, please consult to your official distributor.
MODBUS is an open field bus successfully used through the world to connect field devices to a main
controller. This is the reason why MODBUS has been our choice to offer to our customers and
partners an automated solution easy to integrate not only with our brand products but also with a
vast collection of third party components and controllers
MODBUS, MODBUS-RTU and other related names are registered trademarks of MODBUS
Organization. Further information and documentation can be found at http://www.Modbus.org/
1.1.
PRINCIPLE OF OPERATION
The Lumiplus implements MODBUS-RTU as a control-communications feature that allows its
operation and supervision tasks from a MODBUS automation environment. Preventive maintenance
and fault analysis is also possible thanks to the implementation of internal registers in the Lumiplus
with the more relevant operational and error events.
Whenever the Lumiplus is installed, you are not forced to connect it to a MODBUS system, as far as
you do not aim to control or supervise it externally. The Lumiplus can run in local mode, as
traditionally done, without using the MODBUS layer.
However, we expect that the implementation of MODBUS-RTU in the Lumiplus will open to our
advanced customers and partners a wide range of new opportunities and implementation scenarios
thanks to the simplicity and flexibility of the MODBUS-RTU layer.
Using a MODBUS-RTU message, the Lumiplus can change to a specific color, sequence or velocity,
report errors, historical data and so on, giving to the user/installer a wide range of new features
based in the automation of an already existing and proved Lumiplus.
1.2.
BASIC CHARACTERISTICS
The MODBUS communication system provides a Master/Slave implementation among devices sharing
a physical connection. For the Lumiplus, the physical connection is a RS485 half duplex serial layer,
which has been chosen among other options due to its wide implementation and roughness.
For the Lumiplus, a RS-485 half duplex wired connection has been implemented and the projector is
designed to run in a single-master system. In this implementation, Master and Slave figures has a
clear role that is crucial to clear understand for a proper system implementation.
Master Device: Device that controls the data exchange in the bus and, if necessary, implements co-
ordination tasks among different slaves (i.e. PLC Programmable Logic Controller, SCADA, etc).
Slave Device: Devices connected to the bus that attends to the requests from the master, either
reporting information or executing tasks as per Master request.
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