Preliminary information
This guide is designed to provide the most complete information the operator needs to correctly and
safely install and operate the
SMAX absolute linear encoder fitted with MODBUS RTU interface
.
This sensor is designed to measure linear displacements in industrial machines and automation systems.
The measurement system includes a magnetic scale and a magnetic sensor with conversion electronics.
The scale is magnetized with a coded sequence of North-South poles generating a pseudo-random
absolute pattern. As the sensor is moved along the magnetic scale, it detects the displacement and yields
the absolute position information through the Modbus interface.
SMAX is also available with SSI interface (SMAX-BG..., SMAX-GG...) or voltage (SMAX-AV2...) / current
(SMAX-AI1...) analogue interface. SSI / analogue interface encoders are provided with their own technical
documentation.
It is mandatory to pair the sensor with the
MTAX type magnetic scale
. The measuring length can be
200 mm / 7.874”, 300 mm / 11.811” and 600 mm / 23.622”, see the order code.
To make it easier to read the text, this guide can be divided into two main sections.
In the first section general information concerning the safety, the mechanical installation and the
electrical connection as well as tips for setting up and running properly and efficiently the unit are
provided.
While in the second section, entitled
MODBUS Interface
, both general and specific information is given
on the Modbus interface. In this section the interface features and the registers implemented in the unit
are fully described.
In the “Quick reference” section on page 25 the software tool designed by Lika Electronic to easily
configure the encoder via RS-485 serial port is fully described.
