Rice Lake 920i Programmable HMI Indicator/Controller - Profibus DP Interface - Manual (Page 5)

Introduction 1
About This Manual
This manual provides information needed to install
a n d u s e t h e R i c e L a k e We i g h i n g S y s t e m s
Profibus
® -DP Interface. The Profibus-DP Interface
allows 520 , 720i ® , 820i ® , and 920i ® indicators to
communicate with a Profibus master device using the
Profibus-DP communications standard.
1 See the 520 ,
720i , 820i , or 920i Installation Manual for additional
installation information and detailed descriptions of
indicator functions.
The Profibus DP Interface is installed inside the
indicator enclosure. Installation in NEMA 4X
stainless steel enclosures permits use in washdown
environments.
Some procedures described in this manual
require work inside the indicator enclosure.
These procedures are to be performed by
qualified service personnel only.
Authorized distributors and their
employees can view or download this
manual from the Rice Lake Weighing
S y s t e m s d i s t r i b u t o r s i t e a t
www.ricelake.com.
1.0 Introduction
The Profibus-DP Interface functions as a slave node to a Profibus-DP master. The Interface returns weight and
status information from a
520 , 720i , 820i , or 920i indicator to a master device and provides limited control of
indicator functions to the programmer. Indicator configuration and calibration cannot be performed through the
Profibus-DP Interface.
The Profibus-DP master sends commands to the indicator through the Profibus-DP Interface by writing the
commands in the output format. The Profibus-DP Interface returns the weight and status data in the input format.
These actions are referred to as cyclic I/O. See Section 3.0 for descriptions of the cyclic I/O commands.
A CD-ROM containing the GSD file used to configure the master device is supplied with the Profibus-DP
Interface. A printed version of the GSD file is included in Section 4.0.
1. Profibus ® is a registered trademark of Profibus
International.
W arning