In EOS SCADA, Devices represent
the physical devices and other hardware with
which the SCADA system will communicate.
During SCADA design, information about the devices
from which data will be collected must be entered
into the system.
EOS SCADA software communicates with different
industrial devices and applications through
device drivers. Data reading and writing operations
are performed through these drivers. Information
about the drivers included with EOS SCADA is
provided in the relevant sections of the
User Guide.
When device information is configured correctly,
EOS SCADA can communicate with the relevant device,
read data from it, and, where supported, write
data to the device.
To add a new device, right-click the
DEVICES menu item in the SCADA
tree menu to open the Device Context Menu.
The user can perform various device management
operations through the Device Context
Menu. This menu can be used to add,
copy, cut, paste, delete, and reorder devices.
To add a new device, select the
ADD DEVICE option from the
Device Context Menu. This operation creates a
new device with default properties.
The properties of the newly added device can
then be modified using the Settings
Table located on the right side of
the screen. Depending on the hardware with
which the device will communicate and the driver
being used, the relevant properties must be
configured with appropriate values.
Usage:
Right-click the DEVICES
menu item and select ADD DEVICE
from the Device Context Menu that appears.
After a device has been added, its properties can
be modified through the Settings
Table located on the right side.
The table below shows the main properties available
in the device settings, together with their
descriptions and default values.
|
Property Name
|
Property Description
|
Default Value
|
|
DeviceId
|
Device ID
|
0
|
|
DeviceName
|
Device Name
|
DEVICENAME
|
|
IPAddress
|
IP Address
|
127.0.0.1
|
|
HostName
|
Host Name
|
127.0.0.1
|
|
PortNumber
|
Port Number
|
502
|
|
DeviceType
|
Device Type
|
EOS
Modbus
Iec60870
Dnp3
Iec61850
Livedb (Live Database)
S7plc (Siemens S7 PLC)
Opc (OPC DA/UA)
Txt (Simple Text File)
Msmq (Microsoft Message Queuing)
|
|
DeviceModel
|
Device Model
|
Probigendian
(nmodbus1: Most Significant Byte First)
Prolittleendian
(nmodbus2: Most Significant Byte Last)
Probigendianbyteswap
(nmodbus3: Most Significant Byte First with Byte Swap)
Prolittleendianbyteswap
(nmodbus4: Most Significant Byte Last with Byte Swap)
Probigendianwordswap
(nmodbus5: Most Significant Byte First with Word Swap)
Prolittleendianwordswap
(nmodbus6: Most Significant Byte Last with Word Swap)
Probigendianwordbyteswap
(nmodbus7: Most Significant Byte First with Word and Byte Swap)
Prolittleendianwordbyteswap
(nmodbus8: Most Significant Byte Last with Word and Byte Swap)
Rawbigendian
(mdsotcp1: Most Significant Byte First)
Rawlittleendian
(mdsotcp2: Most Significant Byte Last)
Rawbigendianbyteswap
(mdsotcp3: Most Significant Byte First with Byte Swap)
Rawlittleendianbyteswap
(mdsotcp4: Most Significant Byte Last with Byte Swap)
Rawbigendianwordswap
(mdrevcp1: Most Significant Byte First with Word Swap)
Rawlittleendianwordswap
(mdrevcp2: Most Significant Byte Last with Word Swap)
Rawbigendianwordbyteswap
(mdrevcp3: Most Significant Byte First with Word and Byte Swap)
Rawlittleendianwordbyteswap
(mdrevcp4: Most Significant Byte Last with Word and Byte Swap)
|
|
SlaveID
|
Slave Device ID
|
1
|
|
TimeoutTime
|
Timeout Period
|
1000
|
|
ScanRate
|
Scan Rate
|
1000
|
|
TimeLag
|
Delay Time
|
100
|
|
UserName
|
User Name
|
—
|
|
Password
|
Password
|
—
|
|
ExtraParameters
|
Extra Parameters
|
—
|
The DeviceType property determines
which communication driver or data source EOS SCADA
will use to communicate with the device.
Available device types include different communication
and data sources such as EOS, Modbus, IEC 60870,
DNP3, IEC 61850, LIVEDB, Siemens S7 PLC,
OPC DA/UA, TXT, and MSMQ.
Important:
The selected DeviceType value
must be compatible with the communication method
to be used with the device. After selecting the
device type, the relevant communication parameters
must be configured.
Device Model and Data Format
The DeviceModel property is used,
particularly in Modbus and similar communications,
to determine how the byte and word ordering of data
received from the device will be interpreted.
The options available in the Pro and Raw groups allow
data to be interpreted using big-endian,
little-endian, byte swap,
word swap, or combinations of these formats.
The DeviceModel should be selected according to the
data representation format specified in the device
manufacturer's documentation.
The address information of the computer or network
device with which the device will communicate can
be specified using the IPAddress,
HostName, and
PortNumber properties.
The IPAddress property specifies
the IP address of the device, while the
HostName property specifies the
network name of the device or host computer.
The PortNumber property specifies
the TCP/IP port used for communication. The default
value is defined as 502.
In some devices and communication protocols, the
SlaveID property can be used to
specify the address of the slave device with which
communication will take place. The default SlaveID
value is 1.
Timeout and Delay Settings
The TimeoutTime property specifies
the maximum amount of time to wait for a response
during communication operations with the device.
The default value is defined as
1000.
The TimeLag property is used to
specify the delay that may be applied between
communication operations. Its default value is
defined as 100.
Recommendation:
Timeout and delay values should be configured
according to the characteristics of the
communication environment and the response time
of the device.
The ScanRate parameter allows you
to determine the data update and reading interval
for the device.
The scan rate can be used to adjust the bandwidth
requirements of the communication channel according
to the needs of the application. A shorter scan
interval can be used for applications that require
more frequent data updates, while a longer scan
interval may be preferred for slowly changing data.
For example, if very slowly changing data needs to
be read, there is no need to query the device very
frequently. In this case, the ScanRate
value can be increased so that the device is queried
less frequently. This can reduce unnecessary traffic
and communication load on the relevant communication
channel.
The default value of the ScanRate
parameter is 1000 milliseconds.
⚠️ CAUTION
A very short scan interval may cause the device
and communication channel to be queried more
frequently than necessary. Especially in SCADA
systems containing a large number of devices
and data points, scan rates should be determined
according to the actual requirements of the
application.
Some devices and data sources may require user
authentication before communication can be established.
In such cases, the required credentials can be defined
using the UserName and
Password properties.
For devices that do not require a user name and
password, these fields may be left blank.
The ExtraParameters property is
used to define additional parameters that may be
required depending on the device or communication
driver being used.
The usage of this field and the format of the
parameters to be entered may vary depending on the
features of the device driver. It is recommended
to use the parameters specified in the technical
documentation of the relevant driver.
Recommended Device Configuration Workflow
Following the sequence below when defining a new
device will help ensure that the device configuration
is performed in a more controlled manner.
-
Right-click the
DEVICES item in the
SCADA tree menu.
-
Select ADD DEVICE from
the Device Context Menu.
-
Assign a meaningful
DeviceName to the device.
-
Select the appropriate
DeviceType according to
the communication method to be used.
-
If required, determine the
DeviceModel according
to the device's data format.
-
Configure communication information such as
IPAddress,
HostName, and
PortNumber.
-
If required, specify the
SlaveID value.
-
Adjust the TimeoutTime
and TimeLag values according
to the communication conditions.
-
Determine the ScanRate
value according to the requirements of
the application.
-
If required, enter the user name, password,
and extra parameters.
-
Save the device configuration and check
the communication status.
Device definition in EOS SCADA allows devices and
data sources with which the SCADA system will
communicate to be added to the system. New devices
can be added through the DEVICES
menu, and device properties can be configured using
the Settings Table.
In device configuration, parameters such as
DeviceType,
DeviceModel,
IPAddress,
HostName,
PortNumber,
SlaveID, and
ScanRate are particularly important
and should be configured according to the device
and communication protocol being used.
In particular, determining the
ScanRate according to the actual
data update requirements of the application can help
prevent unnecessary communication load and improve
the efficiency of the SCADA system.
