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FS-8700-47 DNP 3.0 Driver Manual Page 30 of 51
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A.7.2. Internal Indications reported in Responses
The Internal Indications (IIN) field is a two-octet field that follows the function code in all
responses. When a request cannot be processed due to formatting errors or unavailable data,
the IIN is always returned with the appropriate bits set.
A.7.3. Server_II_Array
This parameter only applies to Server/responding nodes.
If specified the driver validates that the Data Array exists. If it doesn’t then Error 78 is printed.
The driver uses the 1
st
two elements to form the Internal Indications bytes of all normal responses
(responses where the driver is able to respond to the poll). The driver does not modify these
bytes when building the response but sends the values exactly as found in the Data Array.
If a poll for unknown and/or unsupported objects/devices is received, the driver builds the internal
indications bytes itself. They cannot be controlled using this parameter.