GE 489 - Manual (Page 204)

6-42 489 Generator Management Relay GE Multilin
6.4 DNP PROTOCOL 6 COMMUNICATIONS
6
IMPLEMENTATION TABLE NOTES:
1. For this object, the quantity specified in the request must be exactly 1 as there is only one instance of this object
defined in the relay.
2. All static data known to the relay is returned in response to a request for Class 0. This includes all objects of type 1
(Binary Input), type 10 (Binary Output), type 20 (Binary Counter), type 21 (Frozen Counter) and type 30 (Analog Input).
3. The point tables for Binary Input and Analog Input objects contain a field that defines to which event class the corre-
sponding static data point has been assigned.
4. For this object, the qualifier code must specify an index of 7 only.
5. Delay Measurement (function code 23) is supported since the relay allows for writing the time via object 50 and it also
periodically sets the “Time Synchronization Required” Internal Indication (IIN). The IIN is set at power-up and will be
set again 24 hours after it was last cleared. The IIN is cleared when time is written as object 50 data or if IRIG-B is
enabled and relay time is updated as a result of a successful decoding of this signal.
6.4.3 DEFAULT VARIATIONS
The following table specifies the default variation for all objects returned by the relay. These are the variations that will be
returned for the object in a response when no specific variation is specified in a request.
Table 6–4: DEFAULT VARIATIONS
OBJECT DESCRIPTION DEFAULT
VARIATION
1 Binary Input - Single Bit 1
2 Binary Input Change With Time 2
10 Binary Output Status 2
20 16-Bit Binary Counter without Flag 6
21 16-Bit Frozen Counter without Flag 10
30 32-Bit Analog Input Without Flag 3
32 32-Bit Analog Input Change Without Time 1