Schweitzer Engineering Laboratories SEL-787, Instruction Manual, Page: 174 / 564

4.96
SEL-787 Relay Instruction Manual Date Code 20081022
Protection and Logic Functions
Front-Panel Settings (SET F Command)
Front-Panel Settings (SET F Command)
General Settings
Local bits provide control from the front panel (local bits), and display points
display selected information on the LCD display. However, you need to first
enable the appropriate number of local bits and display points necessary for
your application. When your SEL-787 arrives, four display points are already
enabled, but no local bits are enabled. If more display points are necessary for
your application, use the EDP setting to enable up to 32 display points. Use
the ELB setting to enable up to 32 local bits.
To optimize the time you spend on setting the device, only the number of
enabled display points and enabled local bits become available for use. Use
the front-panel LCD timeout setting (FP_TO) as a security measure. If the
display is within an Access Level 2 function when a timeout occurs, such as
the device setting entry, the function is automatically terminated (without
saving changes) after inactivity for this length of time. After terminating the
function, the front-panel display returns to the default display. If you prefer to
disable the front-panel timeout function during device testing, set the LCD
timeout equal to OFF. Use the front-panel LCD contrast setting (FP_CONT)
to adjust the contrast of the liquid crystal display. Set RSTLED := Y to reset
the latched LEDs automatically when the breaker, or contactor, closes.
Display Points
Use display points to view either the state of internal relay elements (Boolean
information) or analog information on the LCD display. Although the LCD
screen displays a maximum of 16 characters at a time, you can enter up to 60
valid characters. Valid characters are 0–9, A–Z, -, /, ", {, }, space. For text
exceeding 16 characters, the LCD displays the first 16 characters, then scrolls
through the remaining text not initially displayed on the screen.
Table 4.48 Display Point and Local Bit Default Settings
Setting Prompt Setting Range
Setting Name :=
Factory Default
DISPLAY PTS ENABL N, 1–32 EDP := 4
LOCAL BITS ENABL N, 1–32 ELB := N
Table 4.49 Front-Panel General Settings
Setting Prompt Setting Range
Setting Name :=
Factory Default
LCD TIMEOUT OFF, 1–30; min FP_TO := 15
LCD CONTRAST 1–8 FP_CONT := 5
CLOSE RESET LEDS Y, N RSTLED := Y