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Full nameDescriptionUnitDefault value
Anchor
subrpi
subrpi
Requested Publishing Interval

Defines the time interval for the server to send the information about the change of monitored items within the instance subscription by "Publish message".
Note: This parameter defines a proposed value that the OPC UA server can change, e.g. Bernecker-Rainer always returned a value of "Publishing Interval" at least 50 ms, although the requested interval was smaller.

mi:ss.mss00:05.000
Anchor
subrlc
subrlc
Requested LifeTime Count

If the client does not send the request for data till the time defined by (LifeTime Count * Publishing Interval), the subscription expires. The value should be minimally 3 times higher than the "Requested Max KeepAlive Count".
Note: This parameter defines a proposed value that the OPC UA server can change, e.g. Bernecker-Rainer always returned as a value of "LifeTime Count" a maximum of 600, although the requested value was greater.

Number1000
Anchor
subrmkc
subrmkc
Requested Max KeepAlive Count

If the objects of subscription are not changed, the server will send a keep-alive message after elapsing the time (Max Notifications Per Publish * Publishing Interval). The client will confirm this message when it sends a new request for data.
Note: This parameter defines a proposed value that the OPC UA server can change, e.g. Bernecker-Rainer has always returned as a value of "Max KeepAlive Count" a maximum of 200, although the requested value was greater.

Number5
Anchor
mnpp
mnpp
Max Notifications Per Publish
The parameter defines the maximum number of notifications about the object change, which the server can send in one "Publish message". Zero indicates that the number of notifications is unlimited.Number0
Anchor
pe
pe
Publishing Enabled
The parameter enables/disables the publishing within the subscription.YES/NOYES
Anchor
p
p
Priority
It defines a relative priority of a subscription. If the server should send more notifications, the subscription with higher priority is preferred.0-2550

Anchor
mqs
mqs
Samples Queue Size

This parameter enables creating an object queue with the defined length on the OPC UA server's side for each monitored item in a subscription.Number0

Anchor
rt
rt
Read Timestamp

Timestamps used while reading a value:

  • None - timestamp received from OPC server is not used (value will be timestamped by the current time)
  • Source - SourceTimestamp is used
  • Server - ServerTimestamp is used (default)
-Server

Anchor
wt
wt
Write Timestamp

Timestamps used to write a value:

  • None - no timestamp is set
  • Source - SourceTimestamp is set (equal to the timestamp of written value)
  • Server - ServerTimestamp is set (equal to current time)
  • Both - both SourceTimestamp and ServerTimestamp are set

Note: If the OPC server does not support the writing of timestamps, according to the standard it should return the Bad_WriteNotSupported (2155020288) error code.

-None

Anchor
wsc
wsc
Write Status Code

StatusCode item will be used when writing.
Note: According to the standard, the OPC UA Wrapper returns the Bad_WriteNotSupported (2155020288) error code if the StatusCode entry is used when writing to the OPC DA Server version 2.05a.
YES/NOYES

Anchor
wwa
wwa
Write Whole Array

When an item of an array is written, the entire array is read first and then written. If this parameter is set to NO, only a specific array item is written,
Note: According to the standard, if the OPC server does not support writing a specific array item, it should return the Bad_WriteNotSupported (2155020288) error code.
Note: If this parameter is active, the "Write only" parameter must not be set at the I/O tag which addresses an item of the array.
YES/NONO

Anchor
rm
rm
Read Mode

A way of reading values:

  • Subscribe: communication via subscriptions and notifications (standard)
  • Subscribe + Read: like Subscribe, in addition, periodic Read requests are sent (according to the time parameters of the station)
  • Read: send Read requests only

Note: The Subscribe+Read and Read modes should only be used if there is a problem with standard communication, as they are less efficient and have a higher overhead.

Subscribe
Subscribe+Read
Read
Subscribe

Anchor
nf
nf
No Filter

Ignoring filter parameters in the I/O tag configuration (Sampling type, DeadBand type, Trigger type).
In the specific case, the OPC UA server did not work correctly if monitored items with the specified filter parameters were inserted into the subscription.
YES/NONO


Anchor
protokol_merany_bod
protokol_merany_bod
I/O tag configuration

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NameMeaningUnitDefault value
IDThe identifier in text format, which is, in dependence on ID type, converted to the required native type.
Note: if an identifier %IGNORE is specified for ID type=String, the I/O tag is ignored.
String
ID typeEnumerated types of identifiers. They help to access 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/ByteStringUndefined
Namespace
Anchor
namespace_index
namespace_index
Numerical identifier of the namespace of OPC UA server. Each OPC UA server can have N namespaces. However, the object identifier must be unique in one namespace.Numeric
Variable typeThe value type of objects that can be processed by OPC UA client. Variable type should be used only if the 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 arrayUndefined
Array indexIf 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. The first element of array is identified by index 0.
A text representation of array index may be in several formats:
  • Separate integer, e.g. "6" or "0":- when you want to obtain a single value from the array.
  • Two integers separated by a colon, e.g. "6:7", - if you want to obtain the range of values.
  • The expression separated by a comma in the case of a multidimensional array, e.g. "6,7" - when you want to obtain the particular value of the item of a 2D array. If you want to define a range, you should use expressions separated by a comma, e.g. "6:8,7:10".

Note: Writing is only supported for I/O tags with a specific index, not for ranges.

String
Write onlyIt controls if the I/O tag is a part of the subscription. Its value will be sent periodically from the server in "Publish message".Unchecked/checkedUnchecked
Expanded Node IDIf it is checked, it enables addressing the ExpandedNodeId. Unlike the classic identifier in the OPC UA address space, ExpandedNodeId is supplemented by NameSpace URI and Server index.
Note: ExpandedNodeId is not yet supported in the KOM process.
Unchecked/checkedUnchecked
NamespaceUriText identifier of the namespace of the OPC UA server that is used instead of the numerical representation of a namespace.String
ServerIndexA numerical identifier that addresses the server number when using the  ExpandedNodeID identifier.Numeric0


Anchor
merany_bod_parametre
merany_bod_parametre
Settings of other parameters


NameMeaningUnitDefault value
Sampling typeThe parameter defines a sampling frequency of the monitored objects. When using the "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 ratePublishing rate
Sampling timeThe parameter allows you to set the custom sampling frequency if "Sampling type" is "Custom rate".ss.ms0.0
DeadBand typeDeadband 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/PercentNone
DeadBand valueThe parameter defines the custom value of a deadband if you chose the relative/absolute value ("Percent"/"Absolute").
0.0
Trigger typeThe parameter specifies the condition which causes Data Change Notification. When using "Status", only the status change is reported. Change of value and timestamp are ignored. When using "Status,Value", the change of timestamp is ignored. "Status,Value,Timestamp" ensures the reporting in all options, i.e. when changing the status, value, or timestamp.
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,TimestampStatus,Value,Timestamp

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