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4.3.2
Front panel control
Closing and opening channels
A multiplexer channel is closed from the front panel by
simply keying in the CHANNE L assignment and
pressing CLOSE. For example, to close channel 36 (In-
put 6 ,ef Bank D) of a multiplexer card installed in slot
2, key in the following channel list and press CLOSE:
SELECT CHANNELS 2!36
The above closed channel can be opened by pressing
OPEN or OPEN ALL. The OPEN key opens only the
channels specified in the channel list, and OPEN ALL
opens all channels.
The following display is an example of a channel list
that consists of several channels:
SELECT CHANNELS 2!1,2!3,2!22-2!25
Notice that channel entries are separated by convnas
6). A com~,a is inserted by pwsing JZNTER or the right
cursor key D ). The channel range is qxcified by using
the hyphen (-) key I separate the range limits. Press-
ing CLOSE will cl@> r all the channels specified in the
&me'i
list. Pressing OPEN (or OPEN ALL) will open
the channels.
Scanning channels
Multiplexer
channels are scanned by matig
a scan
list and con+ring
the Model 7001 to perform a scan.
The scan list is created in the same manner as a channel
list (see Closing and opening Channels). However, the
San list is specim
l%n the %Kx.N CHANNEL" dis-
play mode. )The SCAN LIST key toggles between the
channel list and the scan list.) The following shows an
example of a scan list
SCAN CHANNELS 2!1,2!3,2!21-2!25
When a scan is performed, the &am&
specified in the
scan list will be scanned in the order that they are pre-
sented in the scan list.
A manual scan can be performed by using the RESET
default conditions of the Model 7001. RESET is selected
from the SAVESETUP menu of the main MENU. When
,,#,&%T is performed, the mainframe is configured for
:%-ii inbite
number of manual scans. The first press of
STEP takes the mainframe out of the idle state. The
next press of SlXP will close the first cbamel specified
in the scan list. Each subsequent press of STEP will se-
lect the next channel in the scan list.
4.3.3
IEEE-488 bus operation
Bus operation is demonstrated using HP BASIC 4.0.
The prclgr amming statements assume that the primary
address of the mainframe is 07.
Closing and opening channels
The following SCI'I commands are used to close and
open channels:
:CLOSe <lisfi
:Ol'EN <list> I ALL
ne folkming
statement closes channels 1!1, and 1!3
through 1!11:
OlJ-mJT 707; ":dos (@ 1!1,1!3:1!11)"
Notice that the colon (:) is used to separate the range
hits.
Eiti
of the following statement5 will open channels
l!?.
.d 1!3 throl.@ l!ll:
0uTMlT
707; "mpen (@ l!l, 1!3:1!11)"
OUTPUT 707; ":opf?n alY
Scanning channels
There are many commands associated with scanning.
However, it is possible to configure a scan using as llt-
tie as four corNnan ds. These commands are listed as
follows:
4-4
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