GE 1601-0149-A2 manual Analog Inputs Point List Sheet 4, Table Notes

489

Communications Guide

DNP Point Lists

Table 8: Analog Inputs Point List (Sheet 4 of 4)

INDEX	FOR-	DESCRIPTION	EVENT CLASS	NOTES
	MAT		ASSIGNED TO
121	F1	Average Negative Sequence Current	Class 2
122	F1	Average Phase-Phase Voltage	Class 2
123	-	User Map Value 1		Note 5
124	-	User Map Value 2		Note 5
↓	↓	…↓...	↓	↓
246	-	User Map Value 124		Note 5
247	-	User Map Value 125		Note 5
248	F118	Active Setpoint Group	Class 1	Note 3
249	F13	Positive kWh	Class 2
250	F13	Positive kvarh	Class 2
251	F13	Negative kvarh	Class 2
252	F12	Generator Hours Online	Class 2

TABLE NOTES:

1.Unless otherwise specified, an event object will be generated for a point if the current value of the point changes by an amount greater than or equal to two percent of its previous value.

2.An event object is created for the Frequency point if the frequency changes by 0.04 Hz or more from its previous value.

3.An event object is created for these points if the current value of a point is in any way changed from its previous value.

4.To support existing SCADA hardware that is not capable of 32-bit data reads, the upper and lower 16-bit portions of these 32-bit values have been assigned to separate points. To read this data, it is necessary to read both the upper and lower 16-bit portions, concatenate these two values to form a 32-bit value and interpret the result in the format associated with the point as specified in Data Formats on page 40.

5.The data returned by a read of the User Map Value points is determined by the values programmed into the corresponding User Map Address registers (which are only accessible via Modbus). Refer to User-Definable Memory Map Area on page 9 for more information. Changes in User Map Value points never generate event objects. Note that it is possible to refer to a 32-bit quantity in a user map register, which may require the use of a 32-bit variation to read the associated analog input point.

6.The scale for pre-trip currents is determined by the value in point 9, which should not normally change

7.The scale for currents is determined by the value in point 47, which should not normally change

8.Each power quantity is available at two different points, with two different scale factors (kW and MW, for example). The user should select the unit which is clos- est to providing the resolution and range desired. If 32-bit analog input capabil- ity is present, the higher-resolution (kW, kvar, kVA) points should generally be used, since they provide the greatest resolution.

9.Analog input values may be –50000 to +50000 if so configured. Therefore, 32- bit analog input capability is required to read the full possible range. If the SCADA equipment can only read 16-bit registers, the analog inputs should be configured to operate within the range –32768 to +32767.

10.Each neutral voltage quantity is available at two different points, with two dif- ferent scale factors (volts and tenths of a volt). The user should select the unit which is closest to providing the resolution and range desired. If 32-bit analog input capability is present, the higher-resolution (tenths of a volt) points should generally be used, since they provide the greatest resolution.

56

http://www.GEindustrial.com/multilin

GE Multilin