Specifications

Head Station STL-PB1 (Profibus DP) Profibus DP
Quick Start Guide for the MELSEC STlite Series 2 - 3
2.2 Head Station STL-PB1 (Profibus DP)
The head station STL-PB1 serves as Profibus DP slave. It displays the peripheral data of all connected
STlite modules on Profibus DP.
In the initialization phase the head station determines the physical structure of the node and creates
a process image from this with all inputs and outputs. I/O modules with a bit width smaller than 8 can
be combined to form one byte in order to optimize the address space.
In addition the possibility exists to deactivate projected I/O modules. In this manner the physical
structure of the node can be individually designed with regard to the peripheral signals, without
undertaking any changes to an already existing control application. This is done by correspondingly
parametering the modules with the aid of the planning environment (for instance, GX Configura-
tor-DP).
The diagnostics concept is based on an identification and channel based diagnostics in accordance
with EN 50170-2 (Profibus). Thus it is not necessary to program modules for the evaluation of manu-
facturer specific diagnostics information.
Fig. 2-2: Head station STL-PB1 for Profibus DP
(with connected digital input
module)
NOTE
For the specifications of the head station STL-PB1 please refer to the installation manual of the
STlite series.