DNP3 Internal indication (IIN) points

1

• ALL Stations

• All stations message received.

• Set when a request is received with the destination address of the all stations address (0xFFFF hexadecimal).

• Cleared after next response (even if response to global request is required).

• Used to let the master station know that a Broadcasted message was received by this station.

2

• Class 1 data available

• Set when data that has been configured as Class 1 data is ready to be sent to the master.

• Master station should request this class data from the Outstation when this bit is set in a response.

3

• Class 2 data available

• Set when data that has been configured as Class 2 data is ready to be sent to the master Master station should request this class data from the Outstation when this bit is set in a response

4

• Class 3 data available

• Set when data that has been configured as Class 3 data is ready to be sent to the master Master station should request this class data from the Outstation when this bit is set in a response

5

• Need Time

• Time-synchronization required from the master. The master synchronizes the time by writing the Time and Date object to the Outstation.

• Cleared 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.

6

• Local

• Set when some or all of the Outstation's digital output points are in the Local state. That is, the Outstation's control outputs are NOT accessible through the DNP protocol.

• Clear when the Outstation is in the Remote state. That is, the Outstation's control outputs are accessible through the DNP protocol.

7

• Device Trouble

• Set when an abnormal condition exists at the Outstation. The device profile for a given device states the conditions that affect this bit.

• This should only be used when the state cannot be described by a combination of one or more of the other IIN bits.

8

• Device Restart

• Set when the user application at the Outstation restarts.

• Cleared when the master explicitly writes a 0 into this bit of the Internal Indications object in the Outstation.

9

• Bad Function

• Function code not implemented

10

• Unknown Object

• 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 purposes and usually indicates a mismatch in device profiles or configuration problems.

11

• Out of Range

• Parameters in the qualifier range or data fields are not valid or out of range. This is a catch-all for application request formatting errors. This indication should be used for debugging purposes and usually indicates configuration problems.

12

• Buffer Overflow

• Event buffer(s), or other application buffers have overflowed. For example, COS/SOE buffers have overflowed. The master should attempt to recover as much data as possible and indicate to the user that there may be lost data. The appropriate error recovery procedures should be initiated by the user.

13

• Already Executing

• Request understood but requested operation is already executing.

14

• Bad Configuration

• Set to indicate that the current configuration in the Outstation is corrupt and that the master application layer should inform the user of this exception. The master may download another configuration to the Outstation. Note that sometimes a corrupt configuration will disable an Outstation, making it impossible to communicate this condition to a master station.

15

Reserved

16

Reserved