66 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE
Note
The counters cannot be cleared with the Freeze/Clear function codes (9/10). Instead, the
control relay output block points can be used to clear groups of counters. There is only one
copy of each counter, so clearing a counter via Modbus or the front panel display causes
the corresponding DNP counter point to be cleared and vice-versa.
CG.5.4 Analog Input / Input Change (Objects 30/32)
In the following table, the Format column indicates that the associated data point format is
determined by the entry in Data Formats on page CG–42. For example, an “F1” format is
described in that table as a (16-bit) unsigned value without any decimal places. Therefore,
the value read should be interpreted in this manner. Many of the values reported by the
489 have a size of 32-bits and have had their upper and lower 16-bit components assigned
to separate points. Where indicated, refer to the appropriate note following the table for
more detail.
20 50000 Number of Reactive Power Trips
21 50000 Number of Reverse Power Trips
22 50000 Number of Underpower Trips
23 50000 Number of Stator RTD Trips
24 50000 Number of Bearing RTD Trips
25 50000 Number of Other RTD Trips
26 50000 Number of Ambient RTD Trips
27 50000 Number of Thermal Model Trips
28 50000 Number of Inadvertent Energization Trips
29 50000 Number of Analog Input 1 Trips
30 50000 Number of Analog Input 2 Trips
31 50000 Number of Analog Input 3 Trips
32 50000 Number of Analog Input 4 Trips
33 50000 Number of Loss of Excitation Circle 1 Trips
34 50000 Number of Loss of Excitation Circle 2 Trips
35 50000 Number of Ground Directional Trips
36 50000 Number of High Set Phase Overcurrent Trips
37 50000 Number of Distance Zone 1 Trips
38 50000 Number of Distance Zone 2 Trips
Table CG–7: Counters Point List
INDEX ROLLOVER
POINT
DESCRIPTION
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