COMMS # 27
 |
FECO: | COMMS # 27 |
| MODIFICATION No: | N/A | |
| PRODUCT: | DOWTY/CRAY ARROW 80 MULTI PLEXER | |
| SUB-ASSEMBLY | N/A | |
| ESTIMATED MAN HOURS | N/A | |
| CLASS OF CHANGE: | INFORMATIONAL | |
| REASON FOR CHANGE: | INTRODUCTION OF THE DOWTY/CRAY
ARROW 80
MULTI PLEXER INTO THE EDP RANGE |
Change
1.This feco is to introduce the dowty/cray arrow 80. It is already installed on BML sites.
2.The arrow 80 is a 4 or 8 channel statistical Multi Plexer, designed for point to
point work, with asynchronous
channel speeds up to 9600bps, and the composite link speed up to
19200bps.
3.The case is black in colour and the front and rear panels are shown below.
All the indicators are red. The load switch
is a push button switch, whilst the 1 and 2 switches are two
position, either in or out. The mains switch is
at the rear together with the fuse. There is also a separate
supervisor channel for setting up.
(tech serv ref: 22/1/1)
4.Technical specifications.
5.the MEC identities are as follows:-
4 channelarrow-80-mux(4)
8 channelarrow-80-mux(8)
A 4 channel arrow 80 can be upgraded to an 8
channel device by the addition of an expansion PCB,
arrow-80-upgrade(4-8).
6.accessing the interior
6.1.ensure the unit is disconnected from the a.c. supply.
Ensure ESD precautions are observed.
6.2.remove the 7 screws from the rear, 3 at the top, two at the bottom, and one each side.
6.3.gently slide the rear panel and the PCB(s) out of the case.
6.4.access to the inside is now available.
6.5.plug and jumper settings are shown is paragraph 7.
6.6.when replacing the PCB(s) and rear panel into the case, ensure the PCB edges are
engaged in the groove(s)
in the case.
Slide the PCB(s) into the case, taking care
the switches locate correctly through the holes in the front
cover, and do not foul them.
6.7.replace the 7 retaining screws.
6.8.the expansion board is mounted on three pillars, and affixed to the rear panel by
means of the four channel
connectors.
A ribbon cable connects the expansion PCB to the base PCB.
7.plug and jumper settings
The standard settings are shown below.
8.conventions & indications
Local - the end of the link where you are now.
Remote - the other end of the link.
Host port - port connected to a system.
Term port - port connected to a peripheral.
Channels numbered 1-4 and 1-8 not 0-3 or 0-7.
When setting up:-
* a
* to change setting enter ? And options will be displayed. Enter number of option required.
* x is used to exit to previous menu.
When powering on, the indicators will come on then go off.
Active - off - Multi Plexer not powered on.
On - Multi Plexer powered on.
Flashing - hardware error.
Connect on composite link up - connected to remote mux.
Retry out on - transmitted data error - remote mux requests resend.
Retry in on - received data error - local mux requests resend.
Test on - test activated on at least 1 channel.
Mismatch on - local and remote configurations not identical, see paragraph 19.
Tx1-8 on - transmitting data.
Rx1-8 on - receiving data.
9.configuration
9.1.display and note existing configuration settings (see
Paragraph 10).
Note: some existing sites are not set to standard.
9.2.set time/date (see paragraph 11).
9.3.configure channels (see paragraph 12).
9.4.configure console parameters (see paragraph 17).
9.5.configure composite interface (see paragraph 18).
9.6.configuration can be carried out using the front panel buttons and/or a VDU
connected to the supervisor port.
The VDU must be set for a speed of 9600 or
below, asynchronous full-duplex, 1 start bit, 7 data bits, even
parity and 1 stop bit.
9.7.log onto supervisor port by typing:-
The multiplexor will respond:-
"connected dd.mm.yy muxidxxxx link yyyyzzz"
Xxxx = muxes identity
Yyyy = up or down status
Zzz = muxes software revision
And "please press enter to continue:-"
Note: if Multi Plexer requests password,
enter the password. Press
displayed.
Statistical Multi Plexer
Main menu
1 display channel configurations
2 define user channels
3 define console parameters
4 restore factory configuration
5 set date and time
6 message control
7 test and diagnostic functions
8 define composite interface
X to leave console menu
Please enter your selection
10.option one - display channel configurations
Displays local and remote configurations as below.
Always make a note of existing
configurations before commencing work, as the existing settings may not be
standard.
11.set date/time
From main menu select option 5.
Follow prompts for year, month, day, hour and minutes.
12.channel configuration
12.1.all the channels of the mux may be configured in one operation by using;
A)factory configuration from the front panel (paragraph 13).
B)factory configuration from the supervisor port (paragraph 14).
12.2.factory configuration 0 is the standard setting used.
Factory configuration 0
Speed9600
Bits per character8
Paritynone
Stop bits1
Line modehost
Echo no
Dsrhigh
Ctshigh
Dcdhigh
Ringlow
Mux flow controlxon/xoff
User xon flow controlxon/xoff
User v.24 flow controlnone
User xon passed throughno
Note:the line mode must be set to term for ports connected to a peripheral.
12.3.individual channels may be configured from the supervisor port (paragraph 15).
Individual channel setting may be copied to other channels (paragraph 16).
13.to load factory configuration from the front panel.
13.1.turn the Multi Plexer off.
13.2.select configuration by setting the buttons according to the table below;
Configurationbutton 1button 2
Factory configuration 0outout
Factory configuration 1inout
Factory configuration 2outin
Factory configuration 3inin
Standard setting is factory configuration 0.
13.3.then press and hold the load button in while powering the Multi Plexer on.
Continue to hold the button for at
least 5 seconds.
13.4.the new configuration is now loaded.
14.to load factory configuration 0 from supervisor port.
14.1.from the main menu select option 4 - restore factory configuration.
14.2.enter password or
14.3.display
"warning - this option will over write all user settings do you wish to proceed (y or n)"
Enter y or n
14.4.display "factory configuration to use (0-3)". Enter 0.
14.5.display
"mux now returning to factory default [0]
Mux reset - now logged off".
All the channels will be reset.
15.to configure individual channel.
15.1.from the main menu select 2 - define user channels
15.2.display
Define user channel menu
1 copy channels
2 speed, data, general
3 v.24 signals
4 flow control
5 full configuration
X exit
Please enter your selection:
15.3.from menu select 5 - full configuration.
15.4.display. "please select channel (1-8)?" Enter selection.
15.5.the screen will present parameters, local first, remote second, with the present
settings in the order shown
in paragraph 12.2; the standard settings.
? To change
16.copy channel
16.1.from main menu select 2.
16.2.from define user channel menu select 1.
16.3.prompt "select channel to copy (1-8)?" Enter selection.
16.4.master channel pararmeters displayed.
16.5.prompt "copy to channel (x to exit)?" Enter a target channel.
16.6.prompt is repeated - repeat action till all channels targeted. When complete enter x to exit.
17.console parameters (supervisor port)
17.1.from the main menu select option 3 - define console parameters.
17.2.prompt "console>" with existing parameter shown.
Options vt100 or tty console (dumb)
Select option
17.3.prompt "console type"
Options: terminal direct connection
Terminal connection via modem
Select option
17.4.prompt "console> password"
Enter password or
17.5.prompt "auto log off"
Options: 1 disabled
2 1 minute
3 2 minutes
4 5 minutes
5 10 minutes
Select option 1 - disabled
17.6.Multi Plexer id
Enter id from network diagram if not already entered.
18.composite interface
18.1.from main menu select option 8 - define composite interface
Default is v24
Options v24 or x21/v11
18.2.select option required.
18.3.prompt
"please ensure interface connector is in correct connector."
18.4.note: the ribbon cable on the main board must be in the appropriate connector j8
or j9 for the interface
used. See figure g-1.
19.mismatch
19.1.a mismatch is where the configurations held in the local and remote Multi Plexer
is not identical. Identified by
mismatch indicator lit, or display of
"warning configuration mismatch. Use local or remote configuration (l/r)?"
Below main menu.
Press l or r to denote the correctly set unit. The other unit will automatically be reset.
19.2.the front panel can also be used to clear a mismatch.
Set the buttons as below and press the load button.
Correct configurationbutton 1button 2
Local configurationoutout
Remote configurationinin
20.test and diagnostic functions
20.1.the Multi Plexer is equipped with a full range of test and diagnostic functions.
These will help you install the
Multi Plexer and check for problems when it is
in service. There are eight tests you can perform. To access
this sub-menu enter 7 from the main menu:
20.2. Test and diagnostic menu
1 turn test off
2 local terminal loop
3 local terminal loop via link
4 local terminal fox
5 local terminal fox via link
6 remote terminal loop
7 remote terminal loop via link
8 remote terminal fox
9 remote terminal fox via link
X exit
Please enter selection
20.3.test options
20.4.turn test off. Will cancel any test running on a data channel.
20.5.local terminal loop. This option will immediately send back any characters
received on that data channel. The
characters are not sent to the remote Multi
Plexer. It is a userful test for checking the cable between a
terminal and the Multi Plexer.
20.6.local terminal loop via link. Characters received on a data channel are sent to
the remote Multi Plexer on the
composite link and then sent back. The
characters are not transmitted to the remote data channel. This is
useful for checking response times.
20.7.local terminal fox. Will continuously send out a 'quick brown fox' message to all
specified local data channels.
This is useful when you install a Multi Plexer
as you can select this option for all ports, and as soon as you
connect a terminal you will see the message
followed by the data channel number you are connected to.
20.8.local terminal fox via link. This will send each fox message to the remote Multi
Plexer and back before sending
it to the local data channel. To indicate the
message is generated across the link it is terminated by the
word link. This test may be used for checking a
suspected faulty link, i.e. the fox message being delayed
slightly while the Multi Plexer corrects line
noise.
20.9.remote terminal loop. Is identical to option 2 but the loop is generated on the
remote Multi Plexer's data
channel.
20.10.remote terminal loop via link. Identical to option 3 but the loop is generated on
the remote Multi Plexer's
data channel.
20.11.remote terminal fox. Identical to option 4 but the fox message is generated on
the remote Multi Plexer's
data channel.
20.12.remote terminal fox via link. Identical to option 5 but the fox message is
generated on the remote Multi
Plexer's data channel.
20.13from this menu select the required test option. You will then be asked to select
the channels you wish to
perform the tests on:
Select channels to perform tests
Channel number (x to exit):1
Channel number (x to exit):2
Channel number (x to exit):3
Channel number (x to exit):4
Test activated -
If you select a remote test or a test via
the link and the link between the local and remote Multi Plexer is
not in operation, then you will be given the
following warning message and the test requested will be
cancelled.
Remote Multi Plexer not ready - link request
cancelled -
21.cable specs
The quoted cable specs are:-
For v24 composite interface
Multi Plexerlink
Compositeinterface
25pin D Type Male |
25pin D Type Male |
|
2 |
2 |
|
3 |
3 |
|
4 |
4 |
|
5 |
5 |
|
7 |
7 |
|
8 |
8 |
|
15 |
15 |
|
17 |
17 |
|
20 |
20 |
|
24 |
24 |
|
Note: if a moulded 25 way cable, with
all 25 pins connected, pin for pin(1-1, 2-2,etc) is used, on some sites,
the following pins may be found to be
physically broken off; 18, 21, 22. This is required to make the comms
link function.