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
