Dnp3 Udp-Only Mode; Internal Indications - Hitachi Relion 670 Series Communication Protocol Manual
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Section 3
Vendor-specific implementation
3.2
DNP3 UDP-only mode
DNP3 UDP-only mode is supported by the IED. When operating in UDP-only mode the parameters
UDPPortInitNUL and UDPPortCliMast must be configured.
If the parameter UDPPortCliMast is set to 0 the port number and master IP address is taken from the
previous request. It is important to have in mind when using this functionality that the parameters
MasterIP-Addr and MasterIPNetMsk need to be set to values that match the network setup.
The system will only consider IP-address included in the range defined by MasterIP-Addr and the
MasterIPNetMsk as valid addresses to use then when responding.
3.3
Internal indications
Internal indications give information on certain status and error conditions within the outstation. They
contain 2 octets of data and are found in the application layer on an outstation response.
Each octet has 8 bit fields numbered 0 through 7 where bit 0 is the least significant bit. A code is used to
reference or specify a particular bit:
IINx.b - where x is a 1 for the first octet and x is a 2 for the second. b identifies the bit number.
Thus, IIN2.0 refers to the first bit in the second octet.
See the DNP3 Specification Volume 3 Application Layer (Section 5 Detailed IIN Bit Descriptions) for
more detailed descriptions of IIN bits.
Table 1:
Bit index
IIN1.0
IIN1.1
IIN1.2
IIN1.3
IIN1.4
IIN1.5
IIN1.6
IIN1.7
IIN2.0
IIN2.1
Table continues on next page
14
Default class assignment for internal indications
Descriptions and conditions
All stations – set after a broadcast message (any message using a destination
address of 0xfff0 or above) has been received. Does not indicate an error condition
Class 1 event data available. Can be set at any time and does not indicate an error
condition.
Class 2 event data available. Can be set at any time and does not indicate an error
condition
Class 3 event data available. Can be set at any time and does not indicate an error
condition
Time synchronization required from master. Can be set at any time and does not
indicate an error condition. This bit is set according to the PST setting
"tSyncTimeout" when time synchronization is via DNP3.
Local mode. Set if some points are uncontrollable via DNP3.
Device trouble. Set if the IED has detected device problems. This bit is set when the
IED's "Internal Fail" flag is set.
Device restart. Set only under specific conditions. Does not indicate an error
condition
Function unknown. Generally means that the function code (octet 2 of the request
header) cannot be processed.
Object unknown. Generally means that the function code could be processed but the
object group / variation could not be processed
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DNP, 670 series
Communication protocol manual
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