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DISPLAY MODULE OPERATION
This section describes the layout and operation of the
ControLinks™ Display Module. See Fig. 5.
Fig. 5. Identification of S7999 ControLinks™
Display Module display items.
Mode
The MODE item shown in Fig. 5 is the current operating mode
of the R7999. The two primary modes are Auto and Manu,
which correspond to the R7999 Auto/Manual input switch.
Additionally, when the system is firing, other modes may be
shown as described below. Possible MODE values are:
Auto —the R7999 is in automatic operating mode, in which
the firing rate is (or will be, when the system is firing)
provided by the CmA input. Auto will be shown even when
the system is not firing or is getting ready to fire, when the
R7999 Auto/Manual switch is in the Auto position.
Manu —the R7999 is in manual operating mode in which
the firing rate is (or will be, when the system is firing)
provided by the manual potentiometer. Manu will be shown
even when the system is not firing or is getting ready to
fire, when the R7999 Auto/Manual switch is in the Manual
position.
Lim —the Maximum Firing Rate Limiting feature is enabled
(a commissioning option) and the R7999 manual
potentiometer setting is currently limiting the firing rate to a
value that is less than the CmA input currently requested
rate.
Hold —the Low Fire Hold feature is enabled (a
commissioning option) and a Low Fire Hold is currently
active and is limiting the firing rate, because the XmA input
is (or has been) below the Enforce threshold and has not
yet crossed the Release threshold.
HFOn —the system is firing and the firing rate would nor-
mally be provided by either the CmA input (Auto) or the
Manual Potentiometer input (Manu); however the HF input
is on so the normal rate request is overridden, and the
system is, instead, firing at the Purge rate.
LINE 2
M20037
5
S7999 CONTROLINKS™ DISPLAY MODULE
LFOn —the system is firing and the firing rate would
normally be provided by either the CmA input (Auto) or the
Manual Potentiometer input (Manu); however the LF input
is on so the normal rate request is overridden, and the
system is firing at the Lightoff rate.
Rate
The RATE item shown in Fig. 5 is the current firing rate
request that is driving the R7999. Possible values are shown
below using dashes to represent the positions where digits
would appear:
C--% —shows the CmA input current requested rate as a
percentage of its full scale: 4 mA (0%) to 20 mA (100%)
range, effective during Auto mode.
M--% —shows the Manual potentiometer currently
requested rate (0% to 100%), effective during Manu
operation.
X--% —shows the XmA input current value as a percentage
of full scale range: 4 mA (0%) to 20 mA (100%), effective
during a Low Fire Hold when this value is (or has been)
less than the Enforce threshold and has not yet crossed
the Release threshold.
P--% —shows the Purge rate (a commissioning setting),
effective during purging and also when the normal firing is
overridden because the HF input is on during modulation.
L--% —shows the lightoff rate (a commissioning setting),
effective during ignition and also when the normal firing is
overridden because the LF input is on during modulation.
Stop —shows that the system is currently idle and the
motors have been commanded to their stop positions (as
set during commissioning).
Status
The STATUS item shown in Fig. 5 shows the R7999 operating
state. The following are status displays and descriptions:
Startup —the R7999 is starting up.
Initialize —the R7999 is in the initialization stage of its
startup procedure.
Lockout —a fault has occurred, the Alarm output is
energized, and the LCO has been turned off. Manual
intervention is required; the R7999 must be manually reset
before normal operation will continue.
Alarm-Hold —a fault condition is currently present, the
Alarm output is energized, and the LCO has been turned
off. Normal operation will continue if and when the fault
condition clears (without requiring a manual reset) but the
R7999 will continue to hold as long as the fault condition
persists.
Standby —the R7999 is idle, waiting for a demand input at
the LCI terminal.
65-0262
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