Schweitzer Engineering Laboratories SEL-311C, Instruction Manual

Page: 719 / 748

I.13
Date Code 20060320
Instruction Manual SEL-311C Relay
DNP Communications
DNP3 Documentation
Event-class messages are generated whenever an input changes beyond the
value given by the ANADB setting. The dead-band check is done after any
scaling is applied. The angles (the odd numbered points in 0–27) will only
generate an event if, in addition to their dead-band check, the corresponding
magnitude (the preceding point) contains a value greater than the value given
by the ANADB setting. Analog inputs are scanned at approximately a one-
second rate, except for analogs 103–111. During a scan, all events generated
will use the time the scan was initiated. Analogs 103–111 are derived from the
history queue data for the most recently read fault and do not generate event
messages. Analog 103 is a 16-bit composite value, where the upper byte is
defined as follows:
And the lower byte is defined as follows:
The lower byte may contain any combination of the above bits (e.g., a 6 is a B
to C fault and a 9 is an A to Ground fault). If Analog 103 is 0, fault
information has not been read and the related analogs (104–111) do not
contain valid data.
Control Relay Output Blocks (object 12, variation 1) are supported. The
control relays correspond to the remote bits and other functions, as shown
above. The Trip/Close bits take precedence over the control field. The control
field is interpreted as follows:
Value Event Cause
1 Trigger command
2 Pulse command
4 Trip element
8 ER element
Value Fault Type
0 Indeterminate
1 A-Phase
2 B-Phase
4 C-Phase
8 Ground
Index Close (0x4X) Trip (0x8X) Latch On (3) Latch Off (4) Pulse On (1) Pulse Off (2)
0–15 Set Clear Set Clear Pulse Clear
16–23 Pulse Do nothing Pulse Do nothing Pulse Do nothing
24 Pulse RB2 Pulse RB1 Pulse RB2 Pulse RB1 Pulse RB2 Pulse RB1
25 Pulse RB4 Pulse RB3 Pulse RB4 Pulse RB3 Pulse RB4 Pulse RB3
26 Pulse RB6 Pulse RB5 Pulse RB6 Pulse RB5 Pulse RB6 Pulse RB5
27 Pulse RB8 Pulse RB7 Pulse RB8 Pulse RB7 Pulse RB8 Pulse RB7
28 Pulse RB10 Pulse RB9 Pulse RB10 Pulse RB9 Pulse RB10 Pulse RB9
29 Pulse RB12 Pulse RB11 Pulse RB12 Pulse RB11 Pulse RB12 Pulse RB11
30 Pulse RB14 Pulse RB13 Pulse RB14 Pulse RB13 Pulse RB14 Pulse RB13
31 Pulse RB16 Pulse RB15 Pulse RB16 Pulse RB15 Pulse RB16 Pulse RB15
32 Pulse CC Pulse OC Pulse CC Pulse OC Pulse CC Pulse OC