eWON General Reference Guide - Esco Drives & Automation

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General Reference GuideIO Servers Configuration5.2.4 Standard IO server configuration pageWhen no dedicated configuration page is defined for configuring an IO server, the standard configuration page is used.Figure 73: Standard IO server configuration pageAs you can see in the above example, the standard configuration screen is a simple text edition area. Each parameter is entered on a separateline, the parameter value is separated from the parameter name by a colon ':' .The generic format of a line is:PARAM_NAME:PARAM_VALUEWarning: Extra space must be removed.When using this configuration, you must respect the correct syntax of each parameter and the values for each parameter.The list of valid parameters and their corresponding valid values are listed in the corresponding IO server documentation (see following chapters).Any error that would occur when the eWON applies the configuration that you have entered would be written to the event file. Please refer tochapter “Files transfer” on page 154 to see how to get access to the events file.RG-001-0-EN ver 1.5 eWON® - 20/03/2009 - ©ACT'L sa Page 87
General Reference GuideIO Servers Configuration5.3 Modbus IO server5.3.1 IntroductionThe MODBUS IO Server setup is the standard remote IO communication setup of the eWON. It is used to configure:• The eWON as a Modbus RTU master.• The eWON as a Modbus TCP slave and master.The first feature (Modbus TCP slave) is specific to the MODBUS IO server; it is actually designed to provide access to eWON Tag values and,unlike all the other IO servers, for interfacing field values with the eWON.The second feature (MODBUS Master) is the actual IO server feature that provides an interface to the field values as a common IO server.The eWON MODBUS IO server will give access to values in equipments having a MODBUS interface.The interface can be:• RS485 – MODBUS RTU protocol will be used• ETHERNET/PPP – MODBUS TCP protocol will be used.The eWON can mix access to MODBUS RTU and MODBUS TCP, depending on the way the Tag address is defined.5.3.2 Setup5.3.2.1 Setup for eWON ServerFigure 74: Modbus TCP Server configurationThis page defines the eWON configuration when used as a Modbus TCP slave.As described in the Tag configuration paragraph, each Tag can be published to Modbus TCP so that a Modbus TCP can read their values.This setup screen defines the eWON address, and globally enables or disables the Modbus TCP slave feature.eWON Server PropertieseWON server enabledModbus TCP Unit addressDescriptionGlobally enables or disables the Modbus TCP Server feature. If disabled, then any requestfrom a Modbus TCP master will be rejected, even if Tags are published.This feature is used by some gateway but can usually be left to 1 because Modbus TCPappears as a point to point connection.Table 56: eWON server configuration - eWON as Modbus TCP slave5.3.2.2 Setup for eWON IO server and Gateway - COM SetupFigure 75: Modbus communications configurationIf more than one Serial port are available, you must choose on which COM the modbus request will be sent.This configuration part defines the RS485 setup. The four first fields are used to define the baud rate, parity, number of stop bits and the replytimeout (in msec – usually 1000 msec).Warning: When there are multiple IO servers using potentially the serial line, then the unused IO server must be Cleared or thebaudrate must be set to Disabled.RG-001-0-EN ver 1.5 eWON® - 20/03/2009 - ©ACT'L sa Page 88
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