Toshiba 18 - 1250 A - Manual (Page 81)

TE Series Digital Solid State Soft Starters 18 – 1250A
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Appendix 4: Process Control Timer Functions
F030 through F039; Overview of Process Timer Control and Time Clock Controller Features:
The following special functions allow your TE Series starter to operate automatically from an internal Process
Control Timer and Time Clock Controller (TCC) using a real time clock. The Process Control Timer (F030 and
F031) can be used independently or together with the TCC feature (F032-39). The TCC requires using the
Process Control Timer to provide for Start commands (depending on the selected mode). Time progression and
clock values can be read in the Status Screen (see section 5.3.1).
A convenient chart at the end of this appendix shows all settings and interactions.
F030 = Process Control Timer Selection
Factory Setting = 0 (Disabled)
Range = 0, 1, 2
This function enables a Process Control Timer, which offers
two operating modes (Minimum Batch Run Timer and
Permissive Run Timer), selected by entering 1 or 2 here.
F030 = 1: Minimum Batch Run Timer
In this mode, the Process Control Timer engages that the
motor will run for a minimum amount of time, regardless of
whether someone stops it intentionally, or power fails and
returns. When selected to Minimum Run Timer, it begins
counting down after a Start command. The Time Value is set in
F031. When the time value reaches [0000] the starter will turn
off, even if the Start command is still closed and without a Stop
command.
To Reset the timer in this mode, give a Stop command after the
timer has expired. If using the TCC (F032), reset is automatic
when completed and no other Run command is present.
If a Stop Command, power failure or Fault trip occurs during
timed operation, the Process Control Timer is suspended and
maintains its value. When the starter is then restarted, the timer
resumes counting down to ensure that the motor has run for the
programmed amount of time (finishes the batch).
Use this function to ensure that a load operates for a minimum amount
of time regardless of other circumstances. Examples would be:
ƒ Irrigation pumps where a specific amount of pumping time is
required even if the pump is shut down on a low level alarm and
then resets, or power fails and returns.
ƒ Mixers that need to agitate for a specific amount of time yet
may be shut down when power fails or as product is added.
ƒ Aeration Blowers that must be run for minimum amounts of
time to ensure that proper aeration (contact time) has been
provided to a tank.
ƒ NOTE:
In 2-wire control systems where the Run command is maintained, the
starter will automatically restart after a power failure or a Trip is reset.
Use appropriate warnings as mentioned in section 3.1.3.b (see the
following F032 description for an exception to this).
In 3-wire control systems, a new Start command will be required to
restart the starter.