Section 2
SUPERVISOR II SEQUENCING
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sure drops below this limit then the machine with the lowest SEQ HRS or COM ID is start-
ed immediately. A machine will also start if the pressure is below the Trim Low Setpoint for
a period of time. The length of this time is 0 to 120 seconds depending on the pressure. The
closer the pressure is to LOWEST pressure the shorter the time. For example if the pres-
sure drops below the Trim Low Setpoint by 1psi (.07 bar), and stays there a machine will
start in 120 seconds. If the pressure drops near LOWEST PRESSURE then a machine will
start in just a few seconds.
RECOVER - Recovery time. This parameter adds a delay between subsequent start, load
and unload commands.
ROTATE - Rotate time for two-machine systems. There are some systems where the trim
machine never unloads or stops and the second machine is never required; specifically a
two-machine system where one machine runs all the time and the other is used only for
backup. The rotate parameter forces the trim machine to stop (allowing the other machine
to start). The trim machine will stop when its sequencing hours are more than a stopped
machine sequencing hours by the rotate hours value. WARNING - do not enable this mode
when the above situation is NOT true, because unexpected starts and stops may occur
when manually starting or stopping a machine in the sequence for maintenance.
For example, consider a two-machine system with SEQUENCING hours of 1000 and
ROTATE of 50 hours on each machine. If one machine is started and continuously loaded,
it will run until it's sequence hours are 1050 (50 hours more than the stopped machine) then
stop. The other machine will start and run until it's sequence hours are 1100 (50 more than
the stopped machine) then stop, and so the machine will rotate back and forth every 100
hours.
CAPACITY - Not a functional parameter
SEQ HRS - To change this parameter, push the program key until SEQ HRS is displayed
on the top line of the display. Pushing the logo key will increment by 1000 hours, the up
arrow key will increment by 100 hours and the lamp test key will decrement by 100 hours.
The number will roll over at 30,000 hours. To set the hours to a lower number it may be eas-
ier to push the logo key until the display reads 30,000, then hit the up arrow key, the display
will then go to 0.
SYSTEM DISPLAY
There is a system display that may be helpful for trouble-shooting, and calibration. While in
the main display, push the logo key followed by the display key. The top line of the display
should show the numbers 1 through the number of machines in the system (set by param-
eter LAST COM). The second line shows the status of each machine. If the status letter is
lower case then the machine has a fault or warning. The status letters are:
E E-Stop U Unloaded
M Manual stop B Standby
L Loaded F Full Load
T Trim (loaded and modulating) S Starting
R Remote or sequence stop
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