Communications Menu - GE Multilin DFF Instruction Manual

9.5 SINGLE KEY OPERATIONS.
The DFF relay allows a simplified operation mode through the use of the ENT key. This mode allows access to
various relay information without the necessity to remove the transparent plastic cover. The operation mode consists
of repeatedly pressing the ENT key. To access this mode the relay must be in standby. The available information in
this operation mode is shown in the following table in the order that it is displayed.
MAGNITUDES
Va
Vb
Vc
Vn
Frequency
dF/Dt
PROTECTION STATUS
ACTIVE TABLE
DATE/TIME

9.6 COMMUNICATIONS MENU.

The DFF relay includes a communications menu that can be accessed exclusively through the keypad. It is used to
select how the DFF will interact with the external environment.
The configuration unit is entered from the standby screen by entering a four digit numerical code (sequence of key
strokes). If the code is correct the LCD will show the configuration menu, if not the relay will return to the standby
screen.
The code is common to all DFF relays. It is not meant to be a password, but a simple measure of security to avoid
accidental manipulation of the configuration. The code is "7" "1" "6" "9", which was selected because it is the
corresponding ASCII code for the initials GE ("G"="71", "E"="69"). This is the step by step sequence of displays to
access the communications menu from the standby screen:
DFF
GENERAL ELECTRIC
6
→ ***
The settings are as follows: (to move in this group, ↑/↓ keys must be pressed).
• NET BAUD RATE: The baud rate used in the remote communication port at the rear. The possible values for
setting are between 1,200 and 115,200 baud.
• NET STOP BITS: Number of bits added to each byte transmitted across the serial line (remote comm. port). It is
treated as a logical binary setting with the logical key 1/Y for 1, and key 3/N for 2.
• LOCAL BAUD RATE: The baud rate used in the local communication port at the front. The possible values for
setting are between 1,200 and 115,200 baud.
• LOCAL STOP BITS: Number of bits added to each byte transmitted across the serial line (local comm. port). It is
treated as a logical binary setting with the logical key 1/Y for 1, and key 3/N for 2.
• LOCAL SETTINGS: Setting which enables/disables the settings change via local communication.
GEK-106166E
KEYPAD AND DISPLAY
DESCRIPTION
phase A primary voltage value (kV)
phase B primary voltage value (kV)
phase C primary voltage value (kV)
ground primary voltage value (kV)
frequency value (Hz)
rate of change of frequency (Hz/s)
protection 'in' or 'out of service'
active settings table
date and time
7
→ *
NET BAUD RATE
9
→
DFF Digital Feeder Relay
1
**
→
57