CAMCORP CAM-AIRO Vertical Cartridge - Manual (Page 31)

available. You will note that both the master controllers and
slave boards have a telephone style connector mounted on
the upper right hand side of the board. These connectors are
for use in systems requiring slave boards that must be daisy
chained together to provide additional channel capability. For
systems that require the slave boards, the master controller
must not have any connection made to its daisy chain input
unless it is designated as a slave control itself. (For larger
systems requiring more than three slave boards, a master
controller must be used as the fourth slave board to satisfy
power requirements.) This sequence would repeat itself until
the limit of 255 channels has been reached. The cables used
are not ordinary telephone style cables.
Caution: Do not use telephone jumper cables.
These have a “twist” in the connection and may
damage the controllers. Cables designed for use
with the DCT1000 are available from Dwyer Instruments
(Model DCAC02-2 ft., DCAC04-4 ft., etc.).
2.4.4 Continuous Cycle Mode
The master controller has several operating modes available
for different applications. Starting with the most basic mode,
it is capable of operating in a continuous cleaning cycle. This
can be initiated by either placing a jumper between the high
limit input and the common, or the manual override input to
the common connection. Controlling this cycle are three
setup parameters: time off, time on, and cycle delay. Time on
and time off specifically deal with the solenoid on time and
the time interval between the end of the on pulse and the
start of the next. The cycle delay allows a delay of up to 255
minutes to be programmed between the end of one com-
plete cleaning cycle and the beginning of the next. This
allows additional options for defining a cleaning profile.
3.0 Master Controller Panel Features
We’ve made it easy to navigate the DCT1000. Menu items
can be accessed simply by pressing the “SELECT” button.
The menu item that you are currently accessing is indicated
by the illumination of an LED. To change menu items, all you
have to do is push “UP” to increase a value or push “DOWN”
to decrease a value. There are no keystrokes that you need
to memorize, special combinations, or passwords that are
required.
The master controller is equipped with an on board display
and programming information center. The controller will
power-up with the process indicator illuminated. If a pres-
sure module is installed, the display will indicate the meas-
ured pressure in inches of water (w.c.); otherwise it will nor-
mally be blank.
3.1 Last Output Setup
The Last Output setup selects the last channel to be activat-
ed. When first selected, the display will flash the last output
available in the system. With single board installations, this
will be the number of channels installed, typically 10 or 22.
This value becomes more important when multiple modules
are installed. The last output value flashed will be the sum of
all channels available in the system.
After the last available channel indication has completed, the
currently programmed last channel value is displayed. This
value may be changed using the Up and Down buttons. The
minimum value is one while the maximum value is the maxi-
mum number of installed channels, including all expansion
modules.
You may restore the factory default setting by pressing both
Up and Down simultaneously and holding for about four sec-
onds. The default value is the maximum number of channels.
Pressing Select will change the setup mode to Time Off
Setup.
3.2 Time Off Setup
Time off defines the period of time between solenoid activa-
tions when no channels are enabled. This may be set
between one second and 255 seconds. The factory default
is 10 seconds. The display will show the current time off set-
ting when the time off setup mode is entered. The value may
be changed using the Up and Down buttons. Pressing both
Up and Down simultaneously and holding for approximately
four seconds will restore the default value of 10. Pressing the
Select switch will change the setup mode to Time On Setup.
3.3 Time On Setup
Time On Setup sets the solenoid on time. The display will
indicate the currently programmed time on setting. This is
measured in milliseconds. Using the Up and Down buttons,
the value may be changed. The value may be set between 10
msec and 600 msec in 10 msec increments. Pressing the Up
and Down buttons simultaneously for approximately four
seconds will restore the factory default value of 100 msec.
Pressing the Select button will advance the setup mode to
the High Limit setup if the pressure module is installed. With
no pressure module, it will step to Cycle Delay Setup.
3.4 High Limit Setup
The High Limit Setup, available only with a pressure module
installed, sets the pressure at which the cleaning cycle will
begin. This value may be between zero and the pressure
module calibration pressure. Normally, the High Limit should
be above the Low Limit. If, however, the High Limit pressure
is set below the Low Limit, the cleaning cycle will begin when
the High Limit is exceeded and stop when the pressure falls
below the High Limit. The Low Limit in this case will have no
effect. Pressing both Up and Down buttons simultaneously
and holding for about four seconds will restore the factory
setting for High Limit to 5.0
″
w.c. [1.24 kPa]. Pressing Select
will change the system to the Low Limit Setup mode.
3.5 Low Limit Setup
The operation of the Low Limit, available only with a pressure
module installed, is identical to the High Limit except that the
default Low Limit pressure is 3.0
″
w.c. [0.75 kPa]. The upper
settable value is the calibration pressure of the pressure
module and the lower limit is zero. Pressing Select will
change the system to the High Alarm Setup mode.
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