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S7999 CONTROLINKS™ DISPLAY MODULE
Proc-Demand —the R7999 has detected an input at the
LCI terminal and is processing a demand request from the
burner control by moving the actuators to the position
requested by the HF ( or LF) inputs.
Purge —the R7999 has completed moving the actuators to
the Purge position, in response to the LCI and HF inputs,
and has turned on the HFP (High Fire Proven) output.
Lightoff —the R7999 has completed moving the actuators
to the lightoff position, in response to the LCI and LF
inputs, and has turned on the LFP (Lightoff Position
Proven) output.
Modulate —the R7999 has detected that the LCI and MV
inputs are on, and the HF and LF inputs are off, and is
therefore controlling the firing rate, using either automatic
or manual mode.
Run-Lightoff —the R7999 would be in the Modulate
position, except that the LF input is also on. Therefore, the
R7999 is ignoring its normal rate inputs (CmA or the
Manual Potentiometer) and is, instead, firing at the lightoff
rate.
Run Purge —the R7999 would be in the Modulate
condition, except that the HF input is also on. Therefore,
it is ignoring the normal rate inputs (CmA or the Manual
Potentiometer) and, instead, is firing at the Purge rate.
Post-Purge —the R7999 recently left the Modulate
condition because LCI turned off and is moving (or has
finished moving) the actuators to the position commanded
by the HF and LF inputs. It assumes that the burner control
is post-purging the combustion chamber and continues to
display "Post-Purge" for the time determined by an R7999
commissioning parameter (even though the burner control
may have a different actual postpurge time.
Wait-XXX —the R7999 has detected an unusual input
condition at its LCI, HF, LF and MV inputs that is not part of
a normal sequence of operation. It is in a hold condition in
which it keeps LCO turned off, and waits for the condition
to be resolved. The "XXX" part of the status message
describes the inputs that are on; for example in the
abnormal condition where the MV input is on even though
LCI is off, the displayed status will be "Wait-MV".
65-0262
LINE2
The LINE2 item shown in Fig. 5 normally describes the
contents of the second line of the display; however, when the
display is first powered up, this area is used to indicate the
progress of the initialization of the S7999 display itself.
Fig. 6. Display module LINE2 area
during display initialization.
After the display is first energized or connected, it must wait to
receive 15 different configuration information records from the
R7999 before it is fully functional. Although the R7999
transmits its active status once per second, it transmits a
complete set of its configuration information (which does not
change) at a much slower rate, sending only part of it each
time that it transmits a message.
When the display is initially powered up or connected to an
R7999, it shows a spinning line to indicate that it is actively
receiving these initial messages, and it shows a countdown
value that goes from 15 to 0, indicating the progress in
receiving all of the information that it needs. When the last
information record has been received and the countdown
reaches zero, then the LINE2 field reverts to its normal
function of describing the second line, and the up/down scroll
prompt appears in the lower left corner of the display,
indicating that scrolling is now possible.
In addition to the configuration information records, the R7999
also transmits information about the points on the fuel/air/FGR
curve. These records are ignored by the S7999, but they do
interrupt the countdown process. While the point information
records are being received (and ignored), the spinning line
changes to a display of letters (A, B, C, ..., for example) and
the countdown holds. There will be as many letter codes as
there are points on the curve.
During normal operation, after the display has finished its own
initialization, the LINE2 area shows one of the following:
Blank —when the LINE2 area is blank then the display is
showing an item from the top-level menu in its second line.
IO—Input/Output: the display is showing an item from the
Input/Output submenu in its second line.
MS—Motor Settings: the display is showing an item from
the Motor Settings submenu in its second line.
CS—Configuration Settings: the display is showing an
item from the Configuration Settings submenu in its second
line.
H1...H6—Fault History: the display is showing an item
from the Fault History in its second line. H1 is the most
recent fault and H6 is the oldest fault.
6
M20042
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