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| Bit |
| Explanation |
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| response |
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| Class 2 data available |
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| Bit Set when data that has been configured as Class 2 data is ready to be sent to the master | |||
2Master station should request this class data from the Outstation when this bit is set in a response
Class 3 data available
Bit Set when data that has been configured as Class 3 data is ready to be sent to the master
3Master station should request this class data from the Outstation when this bit is set in a response
4Cleared when the time is set by the master. This bit is also cleared when the master explicitly writes a 0 into this bit of the Internal Indication object of the Outstation.
Set when some or all of the Outstation's digital output points are in the Local state. That is, Bit the Outstation's control outputs are NOT accessible through the DNP protocol.
5Clear when the Outstation is in the Remote state. That is, the Outstation's control outputs are accessible through the DNP protocol.
Device trouble
Bit | Set when an abnormal condition exists at the Outstation. The device profile for a given device | |
states the conditions that affect this bit. | ||
6 | ||
This should only be used when the state can not be described by a combination of one or | ||
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| more of the other IIN bits. | |
| Device restart | |
Bit Set when the user application at the Outstation restarts. | ||
7Cleared when the master explicitly Writes a 0 into this bit of the Internal Indications object in the Outstation.
Second Byte
Bit | Function code not implemented | |
0 | ||
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Bit | Requested object(s) unknown. The Outstation does not have the specified objects or there | |
are no objects assigned to the requested class. This indication should be used for debugging | ||
1 | ||
purposes and usually indicates a mismatch in device profiles or configuration problems. | ||
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Bit | Parameters in the qualifier, range or data fields are not valid or out of range. This is a | |
for application request formatting errors. This indication should be used for debugging | ||
2 | ||
purposes and usually indicates configuration problems. | ||
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| Event buffer(s), or other application buffers have overflowed. For example, COS/SOE buffers | |
Bit have overflowed. The master should attempt to recover as much data as possible and | ||
3indicate to the user that their may be lost data. The appropriate error recovery procedures should be initiated by the user.
Bit | Request understood but requested operation is already executing. | |
4 | ||
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| Set to indicate that the current configuration in the Outstation is corrupt and that the master | |
Bit application layer should inform the user of this exception. The master may download another | ||
5configuration to the Outstation. Note that sometimes a corrupt configuration will disable an Outstation, making it impossible to communicate this condition to a master station.
Bit | Reserved for use by agreement, currently always returned as zero (0). | |
6 | ||
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Bit | Reserved for use by agreement, currently always returned as zero (0). | |
7 | ||
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