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| Parameter name | Meaning | Unit | Default value | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Session text identifier. Session identifier should be a unique within the client instance, making it possible to search problems faster in the client or server logs. | String | Kom process | ||||||||
| The channel must be reopened before this time limit elapses. If the time is exceeded, the channel will be closed and unable to change data. | hh:mm:ss | 01:00:00 | ||||||||
| Any message should be changed between client and server before this time limit elapses. If it is not sent, the sources within the session that are kept on the server are released. The primary work of this parameter is to remove the sessions that became inactive because of some unexpected reason. | mm:ss | 01:00 | ||||||||
| Type of autentication used with OPC UA server. Supported types are: | Anonymous / Username | Anonymous | ||||||||
| User name used in authentication if Authentication type = Username. | ||||||||||
| Password used in authentication if Authentication type = Username. | ||||||||||
| It changes the number of information about the communication. We recommend to enable the mode Extended/Full only when detecting the problems and debugging the communication. | Normal/Extended/Full | Normal | ||||||||
| Parameter defines the thread(s) that will send the debug info about the communication. | Receiving/Sending/Others treads/All threads | All threads |
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| Name | Meaning | Unit | Default value | ||||||
|---|---|---|---|---|---|---|---|---|---|
| ID | The identifier in text format, which is, in dependence on ID type, converted to the required native type. | String | |||||||
| ID type | Enumerated types of identifiers. They help to access to the the objects in OPC UA address space. Numeric-1B ID: Identifier limited to 1-byte value (0-255) Numeric-2B ID: Identifier limited to 2-byte value (0-65535) Numeric-4B ID: 4-byte identifier String: Text identifier Guid -16B ID: 16-byte (128-bit) number that is usually divided into four parts. For example 3F2504E0-4F89-11D3-9A0C-0305E82C3301. ByteString: Identifier that is represented as a sequence of bytes. | Numeric-1B ID / Numeric-2B ID/ Numeric-4B ID/String/Guid -16B ID/ByteString | Undefined | ||||||
Namespace
| Numerical identifier of name space of OPC UA server. Each OPC UA server can have N name spaces. However, the object identifier must be unique in one name space. | Numeric | |||||||
| Variable type | Value type of objects that can be processed by OPC UA client. Variable type should be used only if I/O tag is intended for writing. As regards the reading of the object value, the information about type is sent together with the value. | Undefined / Boolean / Byte / SByte / Integer16 / Unsigned16 / Integer32 / Unsigned32 / Integer64 / Unsigned64 / Float / Double / String / UTC Time / Boolean array / Byte array / SByte array / Integer16 array / Unsigned16 array / Integer32 array / Unsigned32 array / Integer64 array / Unsigned64 array / Float array / Double array / String array / UTC Time array / LocalizedText / LocalizedText array | Undefined | ||||||
| Array index | If the object value is represented as a value array (Boolean array / Byte array / SByte array / Integer16 array / Unsigned16 array / Integer32 array / Unsigned32 array / Integer64 array / Unsigned64 array / Float array / Double array / String array / UTC Time array), the parameter defines its range or value of a particular item. A text representation of array index may be in several formats:
| String | |||||||
| Write only | It sets if I/O tag is a part of subscription. Its value will be sent periodically from the server in "Publish message". | Unchecked/checked | Unchecked | ||||||
| Expanded Node ID | If it is checked, it enables to address the ExpandedNodeId. Unlike the classic identifier in the OPC UA address space, ExpandedNodeId is supplemented by NameSpace URI and Server index. | Unchecked/checked | Unchecked | ||||||
| NamespaceUri | Text identifier of name space of OPC UA server that is used instead of the numerical representation of a namespace. | String | |||||||
| ServerIndex | Numerical identifier that address the server number when using the ExpandedNodeID identifier. | Numeric | 0 |
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| Name | Meaning | Unit | Default value |
|---|---|---|---|
| Sampling type | Parameter defines a sampling frequency of monitored object. When using "Publishing rate", the frequency is equivalent to time Requested Publishing Interval, which is set on the communication station level. "Practical fastest rate" sets the sampling frequency on the maximum value. "Custom rate" enables to specify the custom sampling interval, which may be defined in "Sampling Time". | Publishing rate/Practical fastest rate/Custom rate | Publishing rate |
| Sampling time | Parameter allows you to set the custom sampling frequency if "Sampling type" is "Custom rate". | ss.ms | 0.0 |
| DeadBand type | Deadband is a band in which the change of value does not cause Data Change Notification, which is the part of Publish Message. When using "None", this band is ignored. Otherwise, there is used the relative or absolute value ("Percent"/"Absolute") from "DeadBand value". | None/Absolute/Percent | None |
| DeadBand value | Parameter defines the custom value of deadband if you chose the relative/absolute value ("Percent"/"Absolute"). | 0.0 | |
| Trigger type | Parameter specifies the condition which causes Data Change Notification. When using "Status", only the status change is reported. Change of value and time stamp is ignored. When using "Status,Value", the change of time stamp is ignored. "Status,Value,Timestamp" ensures the reporting in all options, i.e. when changing the status, value or time stamp. Note: a specific Simatic S7-1500 did not send value changes if this parameter was set to default "Status, Value, Timestamp" - changing it to "Status, Value" helped. | Status/Status,Value/Status,Value,Timestamp | Status,Value,Timestamp |
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| Command | Syntax | Meaning |
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| STWATCH | STWATCH StationName | Tell command sends commands for reading of values of all configured I/O tag |
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