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Parameter | OPC.GroupAddressType |
|---|---|
Description | It defines the format that is used to map KNX group addresses to server item IDs. 2Level - uses the two-level KNX group address format 3Level - uses the three-level KNX group address format |
Scope | 2level, 3level |
Unit | None |
Default value | 3level |
| Info |
|---|
| !Attention: In contrast to defined parameter within the studio, this has a crucial influence on the structure of all server item IDs. |
The following examples represent the same KNX datapoint:
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Parameter | OPC.PrefixedItemID |
|---|---|
Description | It defines whether the leading "0"-characters shall be added to server item IDs. ON - defines that leading "0"characters are added to the item IDs of KNX group addresses OFF - defines that the item IDs of KNX group addresses do not contain leading "0"-characters |
Scope | ON, OFF |
Unit | None |
Default value | ON |
| Info |
|---|
| !Attention: This parameter has crucial influence on the structure of all server item IDs. |
The following examples represent the same KNX datapoint:
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Parameter | OPC.Delimiter |
|---|---|
Description | It specifies which delimiter shall be used for the item IDs within the server item tree. |
Scope | String (" not allowed) |
Unit | None |
Default value | \ |
| Info |
|---|
! Following OPC parameters are available only for compatibility reasons. In future versions they may vanish. |
TODO: still exist
Parameter | OPC.AsyncWriteConfirmation |
|---|---|
Description | It specifies whether the response data of the asynchronous OPC value write queries ("WRITE") shall be read from the server's data base, or whether it shall directly be retrieved from the field device. ON - the field devices are queried OFF - the values are read from the server's data base |
Scope | ON, OFF |
Unit | None |
Default value | OFF |
| Info |
|---|
!Attention: If the parameter is set on "ON", each OPC "WRITE" command will result in sending up telegrams to the field network. In the case of KNX, up to three KNX telegrams are sent. |
Parameter | OPC.RefreshOnEqualValue |
|---|---|
Description | It specifies whether OPC "OnDataChange" events are generated by incoming values from the field level even if the values are unchanged. ON - the "OnDataChange" of events will be generated OFF - the "OnDataChange" of events will be generated only with changes of value |
Scope | ON, OFF |
Unit | None |
Default value | ON |
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Example:
If the server receives two KNX telegrams with same value and same address (IP + KNX group address) and the option "OPC.RefreshOnEqualValue" is set to "OFF", the OPC "OnDataChange" event is generated only for the first telegram, since the second telegram does not cause a change of value of the datapoint. If this option is set on "ON", then two OPC "OnDataChange" events are generated.
| Info |
|---|
!Attention: Use the following option only with caution!
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Parameter | OPC.AllValuesValid |
|---|---|
Description | If set to "'ON"', server items always have the quality "'GOOD"', even if their quality is "'BAD"' or "'UNCERTAIN"'. This option can be used for limited OPC clients that are not aware of OPC qualities other than "'GOOD"'. |
Scope | ON, OFF |
Unit | None |
Default value | OFF |
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