2-4
BE1-25A Human-Machine Interface
9146600990 Rev M
Table 2-1. Sync Acceptor, Controls and Indicators - Continued
Locator
Control or Indicator
Function
B
Test Jacks - Continued
5. GF>BF. When the module is in test position, provides the
input terminals for a simulated GF>BF contact closure. In the
normal position, these jacks have no function.
6. GV>BV. When the test module is in test position, provides
the input terminals for a simulated GV>BV contact closure.
In the normal position, these jacks have no function.
7. DEAD BUS. When the module is in test position, provides
the input terminals for a simulated Dead Bus Enable signal.
(This signal is useful only if the Dead Bus option is present.)
In the normal position, these jacks have no function.
C
POWER LED
LED lights to indicate that the power supply is operating
correctly.
D
LOAD/FUNCTION
SELECT SWITCH
A three-position switch with the following two active positions.
(The switch is spring loaded to the center position.)
FUNCTION SELECT: Each time the switch is depressed, it
advances the display (F) to show the next register (in the
sequence listed in SETTINGS/READINGS chart (E)). The
leftmost character of the display may be found in the left
column of SETTINGS/READINGS chart which describes the
use of each register.
LOAD: Used to store data into memory. To do so, hold the
switch in the raised position until the display flashes
(disappears and reappears) (takes approximately 1 second).
The data showing in the four rightmost digits of the display is
now recorded in memory.
E
SETTINGS/READINGS
Chart
This chart lists various computer registers that control the
synchronizer or monitor the system. Each register is
identified by the associated character in the left-hand column
of the chart. This digit also appears as the left-most digit of
display F whenever that register has been accessed by
switch D — i..e., the characters displayed in the rightmost
digits of the display represent the generator selected or
status of the particular register identified by the character in
the left column of the chart.
The SETTINGS registers are:
0 ( GEN SELECT): When function 0 is selected, a — or a
digit (1 thru 6) appears as the rightmost character. After
powering up or after reset, a — appears, but once a
generator is selected, a digit appears. The appropriate
character appears until the INCREMENT/DECREMENT
switch is incremented. The INCREMENT/DECREMENT
switch must be held for approximately one-half second for
the change to occur. The sequence is from — to 1 and
incrementing to 6, and then wrapping around to 1.
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