ProSoft Technology MVI69-DNPSNET - Manual (Page 99)

Reference MVI69-DNPSNET ♦ CompactLogix or MicroLogix Platform
Distributed Network Protocol Interface Module
ProSoft Technology, Inc. Page 99 of 119
November 3, 2008
5.6 MVI69-DNPSNET Module
Internal Indication Bits (IIN Bits) for DNP Server
The internal indication bits are stored in a word that follows the function code in
all response messages. These bits report status and error information to the
master DNP device. The following description describes the word.
5.6.1 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 the master station know
that the broadcast was 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 the master. The master should write the date and
time when the 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.
5.6.2 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 the requested operation is already executing. The slave will
never set this bit.
5 Not used.
6 Reserved. Always 0.
7 Reserved. Always 0.