System information

General Reference Guide IO Servers Configuration
RG-001-0-EN ver 1.5 eWON® - 20/03/2009 - ©ACT'L sa Page 132
5.13.2.4 Topic configuration
Figure 103: Topic configuration
Three (3) topics can be used for the IO Server. These topics are used to give a common property to a group of PPI/ISOTCP Tags like:
• Enable/Disable
• Global Device Address
• Polling Rate
5.13.3 Tag name convention
The Item Name can contain the PLC address where the value is polled, or not. If the address is also specified at topic level, the address specified
at Tag level will be ignored.
Topic configuration item Description
Topic enabled Enables or disables polling of all the Tags in the topic.
Global Device Address
See below for the Device Address Syntax. If an address is specified here, it will
replace (overload) the address-defined Tag by Tag.
Poll rate
Defines the refresh rate of the Tag name. In a complex application, we can
imagine that some Tag names must be refreshed every second - typically for
digital input - and other every minute - typically: temperature-.
IO Server Name S7200
Topic Name
A
B
C
Item Name
ValueName, Global Device Address PLC address is defined Tag by Tag
ValueName Topic PLC Address is used.
Table 106: S7200 IO server - Tag name convention table