Toshiba 18 - 1250 A Instruction Manual page 83

TE Series Digital Solid State Soft Starters 18 – 1250A
F030 = 2: Permissive Run Timer.
In this mode, the Process Control Timer engages differently
according to the settings of the Time Clock Controller (TCC).
When the TCC is set to 0 (using "One Shot" operation), the
Process Control Timer begins counting down after the first Start
command. Subsequent stop and start commands have no
further affect on the timer status and can be used to fully control
the starter. When the timer finishes (F031 = [0000]), the starter
will shut off. Upon the next Start command, the timer will reset
and begin counting down again. In 2 wire control systems, the
starter will shut off even if the Run command is still closed, and
will only reset after the Run command has been cycled (opened
and reclosed).
Use this function in without the Time Clock Controller (One-Shot mode)
to ensure that a load only operates for a maximum of the
programmed amount of time, beginning with the first Start
command. Examples would be:
Pumps where the failure of a stop float may lead to dry run
conditions if allowed to operate too long, or when the pump only
needs to run when someone is present, but operate
automatically via float switched (pump-out for service).
Ventilation Blowers where operation is controlled by a manual
switch but may be inadvertently left on when someone leaves.
When the TCC is set for 1 through 8 (using Start Event Cycles),
the timer begins counting down immediately when a Start
Event is activated. Any Start / Stop Command that is given to
the starter during this time will work normally. When the timer
finishes (F031 = [0000]), the starter will shut off, and Start /
Stop commands will no longer function until the next Start
Event Cycle (SEC). In 2 wire control systems, If a Run
command is already present when the SEC occurs, it will make
no difference and the starter will start.
Reset of the Permissive Run Timer will occur only when the
next Start Event Cycle is activated by the Time Clock Controller,
or when changes are made to programming (see NOTE on
programming changes (see "Important NOTE" on page 80).
Loss of control power without program changes will NOT reset
the time.
Use this function in conjunction with the Time Clock Controller to ensure
that a load only operates during the programmed amount of
time, beginning with the Start Event Cycle. Examples would be:
Air compressors where leaking of air lines during normal
downtime causes the compressor to run unnecessarily
Irrigation pumps where operation during parts of the day is
undesirable.
Energy Savings to prevent operation when Time-of-Use (TOU)
metering discounts are provided to promote conservation.
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