Associated with: DNP3 master outstations
The Protocol Alarm attribute is common to outstations on many advanced drivers, but the errors that it might indicate differ, depending on the driver. With outstations on the DNP3 driver, the Protocol Alarm attribute might indicate that any of the following DNP3 IIN Status Bits are set at the outstation:
- NO_FUNC_CODE_SUPPORT—Geo SCADA Expert has attempted to send a command to the DNP3 outstation using a command that the outstation does not support. For example, Geo SCADA Expert has sent a request to disable unsolicited messages on an outstation that either does not support unsolicited messages or does not support the disabling of unsolicited messages.
- If such an error occurs, alter the configuration in Geo SCADA Expert, to disable those features that are not supported by the outstation.
- OBJECT_UNKNOWN—Geo SCADA Expert’s configuration includes database items that are not recognized or supported by the DNP3 outstation. For example, if the outstation only supports integer point types, a protocol alarm will be raised if Geo SCADA Expert attempts to control a point using an IEEE floating point type.
- If such an error occurs, alter the configuration in Geo SCADA Expert, so that it only includes those objects that the outstation supports.
- PARAMETER_ERROR—A parameter error occurs when a DNP3 outstation receives a request it supports, but that cannot be performed due to the request being incorrectly formed, or using a range that the outstation does not support. For example, if a Binary Output point with Point Number 100 exists in the Geo SCADA Expert database, but does not exist at the outstation, a parameter error would be generated if an attempt was made to control that point.
- If a parameter error occurs, alter the configuration either within Geo SCADA Expert or the outstation, so that it corresponds to the features and data ranges that the outstation supports.
Possible states: Displays one of the Standard Alarm States.
Use the Protocol Alarm attribute in conjunction with the IIN Status attribute to ascertain the type of DNP3 IIN bit that is being set. Then check the Events List for any error messages that help to identify the request that is causing the IIN bit to be set. Correct the configuration in Geo SCADA Expert accordingly.