Alstom Reason RPV311, Technical Manual

Page: 81 / 350

RPV311 Chapter 4
– Configuration
RPV311-TM-EN-6 81
7 DIGITAL CHANNELS
The acquisition is simultaneous and synchronized with a time resolution of 65.104
𝜇
s at 60 Hz or 78.125
𝜇
s
at 50 Hz. The polarity is user-programmable (active high, active low).
Digital channels can be associated with physical electrical digital inputs or associated with the detection of
IEC61850 GOOSE messages. For details about the GOOSE messages, see Chapter 12. The level of the
state transitions for physical inputs can be seen in Technical Specifications Chapter 16.
It is possible to adjust denouncing of the digital input to eliminate the effect of switching of the relay contacts.
The debounce time has a 0 to 20ms with 1ms steps.
All transitions of the digital channels are stored in the sequence of events (SOE) record.
To add a new digital channel, select the Digital Channels section and fill in the following:
The I
DENTIFIER
text field allows user to enter a single code for the channel being defined (maximum 12
characters). No editing allowed;
The I
NPUT
scroll box allows user to define the input to which each digital channel is connected. No editing
allowed;
The P
OLARITY
scroll box allows user to select the input logic level (normal or inverted);
D
EBOUNCING TIME
: the RPV311 will only start a record once the binary activation time has exceeded the
debouncing time parameter.
Once the digital channel is created, it shows in the configuration interface menu. When selecting the digital
channel, a screen shows the characteristics of the digital channel selected, as shown in Figure 25 . It is
possible to edit the polarity and the debounce time.