IDEC WindSRV User Manual

Page 62

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61

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KEPServerEX5 Help

Figure 2 - Ethernet Device Properties

Device Names

Device Names, which are logical user-defined names for the device, can be up to 256 characters long. The same names
can be used on multiple channels. While long descriptive names are generally a good idea, some OPC client applications
may have a limited display window when browsing the tag space of an OPC server. The device name and channel name
will become part of the browse tree information as well.

Within an OPC client, the combination of channel name and device name would appear as "ChannelName.DeviceName".

Model

Model is used to select the specific type of the device associated with this ID. The model selection's drop-down menu
contents will vary depending on the communications driver. If a driver does not support a specific model, the model will
be greyed out. If the communication driver being used supports multiple models, try to match the model selection to
the physical device. If the device being used is not represented in the model drop down, select a model that conforms
closest to the target device. To determine this, refer to the driver help documentation that discusses each available
model. In some drivers, a model selection called Open is available, which allows users to communicate without knowing
the specific details of the target device.

Device ID

The Device ID is used to specify a device's driver specific station or node. The type of ID entered will depend on the
communications driver being used. For many communication drivers, the ID is a numeric value. As shown in Figure 1
above, when a driver supports a numeric ID, the menu option allows users to enter a numeric value. Additionally, the
format of the numeric value can be changed to suit the needs of either the application or the characteristics of the
chosen communication driver. The format is set by the driver by default. Possible formats include Decimal, Octal and
Hexadecimal.

If the driver in use is either Ethernet-based or happens to support an unconventional station or node name, Figure 2
may be shown. In this case, the Device ID is TCP/IP ID. TCP/IP (or UDP IDs) consist of four values separated by
periods, with each value containing a range of 0 to 255. Some Device IDs are string based. Depending on the
communications driver being used, there may be more parameters to set up within the ID field. For more information
on Device IDs, refer to the driver's help documentation.

Enable Data Collection

This parameter is used to control the device's active state. Although device communications are enabled by default, this

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