GE SMOR-B GEK 105593C, Инструкция по эксплуатации

Страница: 29 / 103

GEK-105593C
24
The output configuration is done by using different levels. At the first level it is possible to use AND gates of
up to 16 signals (see section 3). The output is incorporated into the states matrix so that it can in turn be
used in next AND gates of up to 16 inputs. This process can continue until the 16 ANDs are used.
Once the AND gates have been configured it is possible to create a second level with OR gates of 16 inputs
limited to the established groups of bytes, and whose logical outputs are assigned to physical outputs of the
unit.
The default output configuration is included in the diagram of external connections in figure 7.
2.5. MAN-MACHINE INTERFACE (MMI)
The SMOR system includes as standard a 20 key keyboard and a 2 line liquid crystal display (LCD) with 16
characters per line. This display has highly reliable LED diode back lighting (the screen brightness can be
adjusted on the rear of the front board).
By means of this interface the user can change the settings, visualize measurements, carry out operations
and access information stored in the unit. The functions of this local interface and how to use it are described
in the section KEYBOARD AND DISPLAY.
2.6. REMOTE COMMUNICATIONS
The relay has 2 serial gates and three connectors. Gate 1 can be reached from the front of the relay in
connector 1 (PORT 1 connector) or from the back (PORT 2 connector). The second gate can be reached
from connector 3 (PORT 3 connector) which is located on the rear.
There are different models each with a different physical connection for the PORT 3 connector (RS-232 or
fiber-optic). In the "RS232" models the three connectors are RS232. In the "RS232 and fiber-optic" models
the PORT1 and PORT2 connectors are RS232 while the PORT3 connector is replaced by a fiber-optic
connector.
The PORT 1 connector has priority over the PORT 2 connector and is selected when the DCD (Data Carrier
Detect) signal is activated. Figure 8 shows how to make the connections to a personal computer.
Gate 1 (PORT 1 and PORT 2 connectors) and 2 (PORT 3 connector) are independent and the unit can serve
them simultaneously.
The communications protocol is the same as that used for the rest of the GE digital protection systems and
requires the use of the GE-LOCAL software. The instruction book for this program, which facilitates dialogue
with the relay, is supplied with the unit. The protocol is reliable and allows communication with different
protection systems. It guarantees very efficient data transfer (especially for the oscillography and other large
files) along with error detection and automatic communication recovery.
The status of the local/remote communication is indicated on the front of the unit by LED indicator 16 (the
last LED in the right-hand column.) Local communication refers to communication via the keyboard/display
(local display showing any information except for the initial SMOR GENERAL ELECTRIC screen), or via
communications gate 1 (PORT 1, PORT2 connectors), and remote communication refers to connection via
gate 2 (PORT 3 rear connector).
Local and remote communications can exist at the same time, although there is only one possibility for
changing settings and carrying out operations, since this can only be done with the communication which
has priority (local communication) while the other is limited only to accessing information. When the local
communication is interrupted, either by the disconnection of PORT 1 connector or because the MMI is on the
initial screen (a situation which can be caused intentionally, or automatically if no key has been pressed for
15 minutes), the remote communication recovers the ability to modify settings and carry out operations.