1BMODBUS IMPLEMENTATION
0BMODBUS RTU PROTOCOL
Chapter 5. MODBUS RTU PROTOCOL
5.1. MODBUS IMPLEMENTATION
The MODBUS protocol has become an industry standard because of its simplicity. The
MODBUS protocol defines three implementations: ASCII, RTU and Modbus Plus. The
implementation on the smART P500 uses the option RTU protocol, described in the
documents “v1.1A MODBUS Application Protocol” and “MODBUS over serial line
specification and implementation guide V1.0” available on page
http://www.modbus.org
The protocol can be used in any of the serial ports of the smART P500. When the user
selects this protocol to one or more ports of the smART P500, other supported protocols
like DNP3 and ArtCom are disabled.
The smART P500 serial ports operate simultaneously and independently from others. As a
result, mixtures of protocols are handled in a natural way. This means that the smART
P500 can operate one or two ports using MODBUS RTU while the others use DNP3
protocol or proprietary (ArtCom).
This document applies to version 2.02.30 of the operating software of the smART P500.
Newer versions of it may make improvements or changes that will be documented through
revisions to this document.
5.2. OPERATION
Before using MODBUS RTU, the smART P500 must be configured using the proART
software. To configure the relay using the software, start communication using a serial port
different from the one where the MODBUS will be used.
After proART software starts the communication with the relay, select Operations /
Protection setting / Communications / and the desired port to configure. Select MODBUS
protocol. Check the speed, protocol, etc.
The configuration is made using a window like the one shown in Figure 5-1.
Содержание smART P500
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