All of the programming for the Ramp / Soak function is done in the Secondary Menu.
You may wish to work out your program on paper before going into the programmer
In the Secondary Menu INDEX to Prog and make sure that Prog is set to OFF.
INDEX to PSEt and turn On.
Skip the StAt setting (this is discussed later) and press INDEX to 1ti.
The following items repeat in the following order: 1ti, 1SP, 1AL (if alarm is pro-
grammed as an event), 2ti, 2SP, 2AL, . . . , 16ti, 16SP, 16AL. To avoid repetition
each item will only be described once.
Set 1ti to the amount of time you want for the first ramp. This value is in time units
(determined by the tbAS menu item) from 0to 9999. Press INDEX.
Set 1SP to the target value desired for the first ramp. This value is in actual units just
like SP1. If the control is programmed for temperature, then the SP displays are in
temperature. If the control is programmed for some other engineering unit, the SP is
set in that unit.
Press INDEX to continue. If Alarm is programmed as an event, then 1AL will appear.
If you wish the Alarm contact to function for this segment, set 1AL for On. If not,
set for OFF. Press INDEX. If Alarm is not programmed as an event, then 1AL will not
appear. If 1AL is set to On, the Alarm function will be active for the entire period as
set in 1ti above.
Complete setting the segment times (2ti ... 16ti), segment set points (2SP... 16SP),
and event alarm (2AL ... 16AL) if it exists.
For unneeded or unused segments set the segment times (2ti ... 16ti) to 0, and set
the segment set points (2SP ... 16SP) to the same value as the last active set point.
Event alarms may be set to indicate "end of run" as you feel necessary.
The last menu item for the ramp / soak function is PEnd. PEnd determines what the
control does when the program has ended. You may choose to have the program
repeat (LooP), Hold the last set point (16SP), revert to the local SP1, or turn the
outputs off (OoFF).
It is important to remember that if you want the program to repeat, you must allow
the process to return to the same condition that existed when the program first start-
ed. Remember that the ramp function calculates the slope by drawing a line from the
beginning PV to the ramp target set point. If the PV at the end of the program is dif-
ferent than the PV at the initial start, the ramp will calculate differently.