User guide

eWON 500-2001-4001-4002 User Guide - eWON Configuration
eWON 500®2001®4001®4002® Version 4_3_0 - User Guide - 10/5/05 - ©ACT'L sa - Page 57
4.4.1.1 Tags monitoring and handling
The eWON engine can handle the following operations on the Tags:
4.4.2 Tag definition: Setup
The Tag Setup page, obtained by clicking on the Tag Setup item of the Configuration menu, allows building the eWON Tag’s dictionary.
The Tag name dictionary is the eWON central database where you have to define all Input / Output (internal – available on the eWON – or
external – through extension bus) that you want the eWON to monitor. If your Input/Output is not defined by a Tag, you will not be able to address
it.
The Tag configuration includes two parts:
• The complete Tag configuration except for the actions to execute in case of an alarm.
• The alarm action list.
The first part of the configuration is accessed through the Tag hyperlink; the second part is accessed with the icon next to the Tag hyperlink.
Note: In the header menu of the Tag edition, a combo box appears with a list of pages (please refer to chapter “Pages configuration”
on page 68). Only the Tags of the selected page will be displayed in the list, except if "ALL" is selected.
Important: If a Tag is created in a page different than the page being displayed, it will not appear in the list, although it is
present.
Figure 34: eWON Tag Setup page
Operation Description
Alarm monitoring
Check for low and high alarm levels or Boolean alarm level and management of alarm
acknowledgement, alarm historical logging and action on alarm (Email, SMS, etc.)
Historical logging
Tags can be monitored and changes on a Tag can be saved in the Flash File System.
Storage can be based on change threshold or at regular interval.
Real Time logging
A Tag history can be kept in memory for an amount of time with a given time interval.
This operation is volatile and does not involve any flash storage.
Modbus TCP publishing
All Tags can be given a Modbus address and can be read using Modbus TCP protocol by and
external modbus TCP master.
Tag grouping Tags can be organized by page for easier handling and viewing.
Script Access All Tags values and attributes can be read or changed from script.
Table 36: Tags operations handled by the eWON