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repeated
until the START/STOP
button
is pressed. Upon ac-
tuation
of the START/STOP
button
all the programmed
chan-
nels are scanned continuously
at the programmed
interval rate.
For this example
choose the following
parameters:
1. First channel
is 5.
2. Last channel
is 20.
3. Interval
time is one second.
4. Number
of poles is 2.
5. Use continuous
scan mode.
Use the following
procedure
to program
the Model 705 for the
preceding
parameters:
I, Install the desired scanner card into the Model 705. Refer to
paragraph
2.2.2.
2. Select appropriate
line voltage
and turn the Model 705 on.
Refer to paragraphs
2.2.1 and 2.3 respectively.
3. Press PRGM, 6, 2, ENTER. For more complete
details refer
to paragraph
2.6.7.
4. Press 0, 5, FIRST. (Programs
channel 5 as the first channel.)
5. Press
2, 0,
LAST.
(Programs
channel
20 as the
last
channel.)
6. Press INTERVAL,
0, 0, 1, 0, 0, 0, ENTER. (Programs
the in-
terval time for one second.)
7. Press CHANNEL,
RESET.
(Turns
on the channel
LED,
selects the channel
mode for display and resets to the pro-
grammed
first channel.)
8. Press CONTINUOUS.
(Selects
the continuous
scan mode
and turns on the continuous
LED.)
9. Press the START/STOP
button
to initiate
the continuous
scan mode.
Upon
the actuation
of the START/STOP
button
in step 9,
channel 5 is closed for one second (programmed
interval
rate)
and the START/STOP
LED turns on. Channel 5 is then open-
ed and the Model 705 advances to the next channel.
Channel 6
closes for one second
and then opens.
The Model
705 ad-
vances to the next channel and the cycle repeats itself until the
last channel
is scanned
(closed
for the programmed
interval
rate and then opened).
At the end of the scan of the last chan-
nel, the Model 705 resets to the programmed
first channel and
then repeats the scanning
sequence.
The scanning
sequence
can be stopped
at any programmed
channel
by simply pressing the START/STOP
button.
Press-
ing the START/STOP
button
during a continuous
scan stops
the scan at the presently
displayed
channel,
the channel
re-
mains closed, and turns off the START/STOP
LED. To start
the scanning
sequence
from the presently
displayed
channel
press the START/STOP
button,
After the scanning
sequence
has stopped,
pressing
the START/STOP
button
starts the
sequence
from the presently
displayed
channel
and turns on
the START/STOP
LED.
To stop the scanning sequence and reset the Model 705 to the
programmed
first channel simply
press the RESET button.
Example 4 Daisy Chaining-The
Model 705 can be connect-
ed to other Model
705's to increase the number
of available
channels.
A total
of five Model
705's can be daisy chained
together
to increase the number of channels up to a maximum
of 100. Each Model 705 has the capability
to support the plug-
in scanner cards. By daisy chaining
the Model 705's together,
there is one instrument
designated
as the master while the rest
of the Model 705's are designated
as slaves. The Model 705's
are designated
either master or slaves by front panel Programs
91 and 92 respectively.
For complete
details concerning
front
panel programs
refer to paragraph
2.6.
In this example
the Model 705 will be programmed
to scan 60
separate
channels,
Two additional
Model 705 scanner
main-
frames
are needed
to implement
this example.
The
three
Model 705's must be daisy chained
together
in order to have
the capability
of the 60 2-pole
channels.
To daisy chain the
Model 705's, refer to the circuit shown
in Figure 2-3.
Each Model 705 will require two scanner cards in order to get
the channels
needed
for this example.
To simplify,
use six
Model
7056
general
purpose
scanner
cards and select
the
following
parameters:
1. First channel
is 1.
2. Last channel
is 60.
3. Interval time is two seconds.
4. Number
of poles is 2.
5. Use continuous
scan mode.
Use the following
procedure
to program
the Model 705 for the
preceding
parameters:
1. Set up the circuit in Figure 2-3.
2. Install the plug-in
scanner cards, two to each Model 705.
Refer to paragraph
2.2.2 for installation
instructions.
MODEL 705
CONTROL
MAINFRAME
SERIAL
IN
r-r
MODEL 705
Figure 2-3. Daisy Chaining Three Model 705's
2-9
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