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7.6 SYSTEM PROGRAMMING - INPUT CODE DESCRIPTION
“3211” Channel Enable / Disable:
This code allows the user to select the number
of channels to be activated. This is determined by the number of remote analog
devices to be connected to the controller. To achieve this, input code “3211”, then
depress push-button “3” to enable a channel or push-button “1” to disable a
channel. Depress push-button “2” to scroll to the next channel. Once this function is
finished, continue to depress push-button “2” until you reach the last channel and
the system will automatically start to scroll through all “active” channels. The system
will ignore the “inactive” channels during normally scrolling. Active channels are
channels that have been switched on and inactive channels are channels that have
been switched off.
Note: This code also allows the user to take a channel “off line” to remove and
service a sensor, if required, while the other channels are being monitored and
displayed normally. Power is still live at the inactive channel terminal strip even
though the channel is offline.
Selection” “Yes or No”
“1122” Decimal:
This code allows the user to add up to three decimal points to the
displayed value. To achieve this, input code “1122”, then depress push-button “3” to
select 1, 2 or 3 decimals. To add or remove decimal points, depress push-button “3”
to increment or push-button “1” to decrement the number. Depress push-button “2”
to scroll to the next channel. Once this function is finished, continue to depress
push-button “2” until you reach the last channel and the system will automatically
start to scroll through all “active” channels.
Selection: “0, 1, 2 or 3”
CH 1 Menu 1122
Decimal Pts 0
7.5 PROGRAMMING PUSH-BUTTONS PHOTO
USE THESE THREE PUSH-BUTTONS TO ENTER ALL FOUR DIGIT PROGRAMMING CODES
CH 1 Menu 3211
Enabled ? Yes
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6.0 SYSTEM OPERATION, CONT’D…..
The audible alarm will also sound in the event of a high level alarm. This can be
silenced by depressing the acknowledge/silence push-button located on the front
enclosure door just below the audible alarm.
Note-1: The operation of any of the relays is subject to any user programmed time
delays and/or latching functions. More information is provided further on in this
manual with regards to these two features.
Note-2: If more than one alarm condition occurs, the display will automatically scroll
only through channels that are in alarm condition. The scroll rate for channels in
alarm condition is slightly faster than the normal scroll rate. The scroll pattern is from
the most serious alarm condition to the lesser alarm condition. Fault is considered to
be the most serious alarm condition folowed by high gas alarm, mid gas alarm and
finally low gas alarm.
Fault Alarms: Upon detection of a fault condition, the red fault LED is illuminated, the
audible alarm sounds and any relays programmed to respond to fault condition are
activated.
Programming: The PAC-44 circuit is completely programmable on site without the
need for a computer. Any changes in the system operation can be made quickly and
easily by means of the push-button programming feature. Three small, momentary
push-buttons can be located on the lower left center area of the circuit board (just
above the analog input terminal strips). These push-buttons can be used to enter a
large selection of four digit codes to access a wide range of system functions and
features. For more detailed information on system programming, consult the
programming section of this manual.
Battery back-up: The PAC-44 system has been designed to accept an optional
battery back up system to provide uninterrupted power to the gas detectors in the
event of a power failure. The wiring input terminal strip for wires coming from the
battery back up system are located at the top of the wiring terminal strip which is
located on the lower left side of the circuit board, just to the left of the programming
push-buttons.
In the event of a system failure fault alarm, first check to ensure that the system
primary fuse has not “blown”, prior to performing other trouble shooting tasks. The
system primary fuse is an automatic resetting thermal fuse and is located just to the
right of the incoming power terminal strip. If the fuse is hot to the touch, this
indicates that it has “blown”. This fuse will not reset itself until the power or wiring
problem has been rectified.
System alarm: The software installed in the PAC-44 controller has a “watchdog
timer” built into it. The watchdog timer watches the microprocessor and if it
encounters an interruption that causes it to veer off track and cause a fault condition,
the watchdog timer automatically resets the microprocessor so the user does not
have to deal with the problem. The system alarm is activated on the LCD display
after the fourth watchdog timer reset. The display will indicate “SYSM ALRM”. The
system will continue to work properly, however, this display will continue to indicate
the alarm message. The user should contact their supplier about this problem. To
clear this alarm, depress and hold the acknowledge push-button for 10 seconds.
Summary of Contents for PAC-44 Series
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