Table 5-2 Parameters That Control Profiler Execution - Honeywell VPR100 User Manual

Discrete inputs
You can program a profiler with discrete inputs that enable you to reset, start, hold, advance, shut down, or
fast forward through the profiler, hot start the profiler from a live process variable, increment a ramp
segment, or enable/disable guaranteed soak. See Table 5-2.
Note that some discretes are edge-sensitive and some are level-sensitive. Edge-sensitive means that the
action is triggered by the discrete's transition from OFF to ON (rising edge) or from ON to OFF (falling
edge). The changing status is what triggers the action, not the status itself. Some discretes, such as
START, are rising edge-sensitive only and are not affected by a falling edge. When START's discrete goes
ON, the profiler starts to run; when the discrete goes OFF, the profiler continues running.
Level-sensitive means that one action occurs while the discrete is ON and another action occurs while the
discrete is OFF. The status is what causes the action, not the changing status. Fast forward's discrete is
level-sensitive; that is, the profiler will run in fast forward while the discrete is ON but not while it is OFF.
Parameter name Definition
START Starts Profiler from Ready, Hold, or End state.
Activated by operator menu or by discrete
input. May be connected to the START/F1 key
(SY1F1).
RESET/RUN
The behavior of this parameter depends on
START. If the START discrete input is
programmed with a discrete, then switching
RESET/RUN from OFF to ON resets an
Ended, Hold, or Ready profiler to the starting
value of segment 1.
If the START discrete input parameter is not
programmed with a discrete, then switching
RESET/RUN from OFF to ON resets an
Ended, Hold, or Ready program to the starting
value of segment 1 and to the profiler's Ready
state. On a transition from ON to OFF, starts
an Ended profiler.
RESET/RUN does not affect a running
program. May be connected to the RESET/F3
key (SY1F3).
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Table 5-2 Parameters That Control Profiler Execution

VPR & VRX – User Manual
Triggered Conditions
by present
Rising Profiler in
edge Ready or End
state
Rising Start is
edge programmed
with a discrete
parameter &
profiler is in
Ready or Hold
or End
Rising START is not
edge programmed
with a discrete
parameter &
profiler is in
Ready or Hold
or End
Falling START is not
edge programmed
with a discrete
parameter &
profiler is at
End
Setpoint Profiler
Result
Profiler
starts to
Run.
Profiler
changes
to Ready
and goes
to
Segment
#1.
Profiler
changes
to Ready
and goes
to
Segment
#1.
Profiler
goes to
Segment
#1 and
starts to
Run.
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