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Thermcraft XST-3-0-36-3V User Manual

Page 219

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Installation and Operation Handbook

Programmer Operation

2416 Controller

5-3

There are five different types of segment:

Ramp

The setpoint ramps linearly, from its current value
to a new value, either at a set rate (called ramp-rate
programming
), or in a set time (called time-to-target
programming
). You must specify the ramp rate, or
the ramp time, and the target setpoint, when creating
or modifying a program.

Dwell

The setpoint remains constant for a specified
period.

Step

The setpoint steps instantaneously from its current
value to a new value.

Call

The main program calls another program as a
subroutine
. The called program then drives the
setpoint until it returns control to the main program.
This facility is only available on those controllers
capable of storing 4 programs.

End

A program either ends in this segment, or
repeats.
You specify which is the case when you
create, or modify, a program (see the final topic in
this chapter). When a program ends, the
programmer is put into either, a continuous Dwell
state with all outputs staying unchanged, or the Reset
state.

Table 5-1 Segment Types

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