ZETRON Model 25, Руководство по эксплуатации продукта

Страница: 17 / 147

025-9567E 9
OPERATION
OVERVIEW
This section covers normal operation of the Model 25 once it has been installed and
programmed.
POWER ON
When power is applied to the Model 25, it automatically begins an extensive self-test. While
the encoder is testing, the LEDs of the encoder and all attached Instant Call panels will be
illuminated. The illumination of each LED allows an operator to verify their operation.
If a fault is found during the self-test then the encoder will display an error number (“
Errx
”)
and begin beeping until it is reset. If an Instant Call panel finds a fault during the test, it will
illuminate some indicators, one of which will be the LED of the
CLEAR
key (lower right-
hand key). See “ENCODER FAULT IDENTIFICATION” (page 59) to interpret the error
indications. The topic “POWER-ON SELF-TEST” (page 55) also contains information on
using the self-test at times other than power-on.
After the power-on self-test has successfully completed, the display of the front panel will
clear, displaying a single dash on the left (“- ”). The cleared display indicates that the
encoder is in the idle state awaiting entry of encoding information. While in the idle state, the
encoder is executing a limited self-test. Faults found in the limited self-test are indicated the
same way as in the full self-test. The four channel busy indicators will always indicate the
busy status of the connected channel busy inputs unless the encoder is in a programming or
test mode.
After long power losses in encoders equipped with time clocks, the date may need to be set.
If the clock needs setting then the display will flash the word “
dAtE
” while beeping. The
operation of setting the clock may be skipped by pressing RESET. For instructions on setting
the clock, see the subsection “SETTING THE CLOCK” on page 19. In encoders equipped
with the clock, the hours and minutes of the current time will automatically be displayed 30
seconds after the encoder enters the idle state. In addition, if a logging printer is connected to
the Computer Port, the time and date will be printed every hour.
Note: Before proceeding with operation, the Model 25 must be programmed if this has
not yet been done. As shipped from our factory, the Model 25 is not programmed.
Programming must be performed only by qualified personnel knowledgeable in
the details of the particular communications system. Once programmed, the
Model 25 will retain its memory, even during power failures, until re-
programmed.