eWON500™
The Transparent Gateway
ver 1.0
9/11/05
Page 8
User Guide
TROUBLESHOOTING
There is no connection to the PLC
Creating a Tag in the eWON500™ to check the serial connection to the PLC
Principles
The first action to take in that case is to validate the connection between the eWON500™ and the
PLC by means of an eWON variable called a Tag.
Each eWON Tag refers to a Topic in which some defined settings are common to each of the Tags
which are attached to it.
Creating a Tag in the eWON500™
IO server Setup
¤ Go back to the appropriate IO Server configuration page
¤ Scroll to the bottom from the page, and check the Topic A Enabled check box
¤ (Special case for the FINS IO server: select Fins Serial as the Protocol)
¤ Let the Poll Rate value set to default
¤ Update the IO server configuration
Tag Setup
¤ Go to the Tag Setup page. From the Main eWON™ menu: Configuration/Tag
Setup/Create New Tag
• Tag Name Any name respecting the eWON syntax (no space, no
special characters)
• Page Let Default
• Description Enter here a free text
• Server Name Select the appropriate Server Name from the scrolling list
• Topic Name Enter A (the topic that has been configured previously)
• Address An existing address on the target PLC on the serial link
• Type Select here the appropriate type for the Tag (Analog or
Boolean)
• Force Read
Only
Validate the checkbox (we will just read the value on the
PLC)
• eWON value Let the two fields unchanged
Add/Update Only to validate the Tag
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