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Diagnostics and Troubleshooting
MVI56-DNP
♦
ControlLogix Platform
User Manual
DNP 3.0 Server
Page 92 of 171
ProSoft Technology, Inc.
July 21, 2011
4.4 Internal
Indication
Word
First Byte
Bit Description
0
All stations message received. Set when a request is received with the destination
address set to 0xffff. Cleared after next response. Used to let Master station know
broadcast received.
1
Class 1 data available. Set when class 1 data is ready to be sent from the slave to
the Master. Master should request class 1 data when this bit is set.
2
Class 2 data available. Set when class 2 data is ready to be sent from the slave to
the Master. Master should request class 2 data when this bit is set.
3
Class 3 data available. Set when class 3 data is ready to be sent from the slave to
the Master. Master should request class 3 data when this bit is set.
4
Time synchronization required from Master. The Master should write the date and
time when this bit is set. After receiving the write command the bit will be cleared.
5
Slave digital outputs are in local control. This bit is not used in this application.
6 Not
Used
7
Device restart. This bit is set when the slave either warm or cold boots. It is cleared
after a Master writes a 0 to the bit.
Second Byte
Bit Description
0
Bad function code. The function code contained in the Master request is not
supported for the specified object/variation.
1
Requested object(s) unknown. Object requested by Master is not supported by the
application.
2
Parameters in the qualifier, range or data fields are not valid or out of range for the
slave.
3
Event buffer(s) or other application buffers have overflowed. This bit is also set if the
slave receives a multi-frame message from the Master.
4
Request understood but requested operation is already executing. The slave will
never set this bit.
5
Bad configuration. The slave configuration is invalid and should be re-configured. If
the configuration is invalid, the slave will set the invalid parameters to default values
and continue to run. Check error log using debug port.
6 Reserved,
always
0.
7 Reserved,
always
0.