4.6. Indicators
The front panel of the Switch contains 10 LEDs.
The Power LED, at the extreme right, will glow
steadily when power is on. The Lockout LED, a
green LED at the extreme left, will light when the
unit is in lockout.
Each of the eight port LEDs, numbered 0 through
7, will respond to the action of the COS II. When
the master port is switched to one of the slaves, the
corresponding LED will glow continuously.
4.7. Front-Panel Button
The reset button is located on the front panel of the
COS-II. After you change one of the DIP switches,
you must reset the COS-II either by pressing the
button or by disconnecting power from the unit.
4.8. Self-Tests
The COS-II can diagnose a variety of conditions
with an array of self-tests. To configure the switch
for a self-test, set the eighth switch of DIP Switch A
to ON.
To run a test, follow these steps:
1. Set SWA 8 (the eighth DIP switch of Bank A) to
ON. 2. Set
the master port to DCE with a shunt
jumper.
3. Set your terminal for 9600-bps operation, with
1 stop bit and no parity.
4. Power the unit.
This message will appear on your screen:
If you select R, the COS II will run any of the tests
you request again and again, until you press the
reset button.
If you select “O,” you get the message:
Explanations and screens for all of these tests are
given below.
RAM Test
The RAM test checks the internal memory of the
Switch by writing an internal test pattern, and then
reading it for accuracy.
LED Test
The LED Test checks the LEDs by turning them all
off, then on one at a time, then all on, then off one
at a time. This test tells you if the LEDs are working
normally or whether any are shorted.
DIP Switch Test
The DIP Switch Test reads the switches and displays
their settings on the screen. This test tells you
whether the switches and associated circuitry are
operating normally and are set up to your
specifications. The settings will be displayed on
screen continuously until a key is pressed. When
you press any key, the box will check the settings
of the Expansion Board switches. If you haven’t
installed a Board, disregard the reading.
EXPANSION BOARD IS INSTALLED
DIP SWITCH TEST (EXPANSION BOARD) HIT ANY KEY TO GO
TO NEXT TEST
SWITCHES ARE DISPLAYED IN BINARY (0=OFF, 1=ON)
SWH SWI SWJ SWK
00010001 00100100 10001000 01010101
19
CHAPTER 4: Operation
DIP SWITCH TEST (MAIN BOARD) HIT ANY KEY TO GO TO
NEXT TEST
SWITCHES ARE DISPLAYED IN BINARY (0=OFF, 1=ON)
SWD SWE SWF SWG
00010001 00100100 10001000 01010101
CODE OPERATED SWITCH II SELF TEST
RUN TESTS (R)EPEATEDLY OR (O)NCE
WHICH TESTS SHOULD BE RUN
(R)AM TEST
(L)ED TEST
(D)IP SWITCH TEST
(S)ERIAL PORT TEST
(I)NTERRUPT TEST
(A)LL TESTS
RAM TEST 8K RAM IS GOOD
LED TEST IN PROGRESS, ALL LEDS SHOULD TURN ON AND
OFF. PRESS ANY KEY TO EXIT.
