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C.3 POINT LISTS
Table C–7: POINT LIST: OBJECTS 40 & 42 (Sheet 8 of 8)
ANALOG OUTPUT (OBJECT 40)
ANALOG OUTPUT BLOCK (OBJECT 41)
INDEX
DESCRIPTION
296
...Reserved...
297
...Reserved...
298
...Reserved...
299
...Reserved...
300
...Reserved...
301
...Reserved...
302
...Reserved...
303
...Reserved...
C
TABLE NOTES:
There are four settings groups in ALPS. However, there is only one group of General Settings categories, CONFIGURE,
COMMPORTS, OSC_GRAPHY, BRKR_DUTY, and INPUTS, which are represented by Analog Output Points 218 to 261.
The other points report the settings from the group selected by the setpoint at Point 0. Note that this only a DNP setpoint,
not part of device settings, and is not stored in non-volatile memory. This setpoint points to the active settings group on
device boot-up or a warm or cold restart. This can be set to point to any other group desired. The setpoint value ranges
from 0 to 3, selecting Settings groups 1 to 4 respectively.
The port settings are not reported as a single Multi-Field number as with other ALPS protocols but are reported as separate
setpoints for each of the port parameters. Each port's baud rate, stop bits and parity are assigned to separate points.
The upper and lower 16-bit portions of all 32-bit values reported by ALPS are assigned to two separate points. To read a
32-bit value, it is necessary to read both the upper and lower 16-bit portions and concatenate these two values to form a
32-bit value and interpret the result according to the format associated with the value.
These setpoints are Multi-field value in other communication protocols of ALPS with each bit corresponding to an option/
field. However, in DNP, each of the bits is assigned to a separate point. Note that the interpretation of the bit remains same
as in other protocols. If a bit has a value of '0' then the corresponding option is OFF and if that bit has a value of '1', the cor-
responding option is ON.
Note that there is an overlap of Point Numbers here. The setpoints from 307 are different in ALPS and LPS-D. The remain-
ing setpoints are same. The ALPS has a total of 334 setpoints.
Data formats for Analog Input and Analog Output Points.
F1 – Signed 16-bit integer, 1 decimal place.
e.g. 123.4 is reported as 1234.
F2 – Signed 16-bit integer, 2 decimal places.
e.g. 12.34 is reported as 1234.
F3 – Signed 16-bit integer, 3 decimal places.
e.g. 1.234 is reported as 1234.
F4 - Signed 16-bit integer, no decimal places
F5 - Signed 8-bit integer, No decimal places. Encoded Fault Type.
C-26
C.3.7 DATA FORMATS – ANALOG INPUT AND OUTPUT POINTS
ALPS Advanced Line Protection System
APPENDIX C
FORMAT / UNITS
REMARKS
GE Power Management
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