17
Depressing “SEL” once again shows the next parameter
and its current value on the display. The parameter value
can either be modified with the buttons or left unmodified.
Pressing the enter button (>) will allow you to modify the
current value using the “Up” and “Down” buttons. Press
the enter button again to set the new value as the current
value. (See “Programming Controller” for information on
programming.)
The control parameters in order are:
LoCt - Parameter lock level. Determines the number of
parameters displayed when you press “SEL”. It should
be set to “0002.” If it does not, set to “0002.”
Nod - Mode. By pushing “UP” or “DOWN” buttons, this
can be set to “Auto” or “NAn” (Manual). Set to “Auto”. In
Manual mode, you must enter values to control the fur-
nace chamber temperature.
At - Autotuning feature. Will automatically set optimum
P.I.D. values for your process. For Tuning, set to “on.”
For normal operation, set to “oFF.”
StAt - Status. Displays current status of program and
cannot be changed.
Tine - Time. Displays the time remaining in the current
program.
ProG - Program options. Can be set to one of three op-
tions: “oFF”, “rUn” or “hold”. “oFF” will stop any running
program and reset the program to the beginning. “rUn”
will start a program from the beginning or resume a pro-
gram from “hold” from the point it was held. “hold” will in-
terrupt a running program without resetting the program
to the beginning.
Sü-1 - Set point 1. The temperature at which the first
ramp is aiming and at which the first dwell will be held.
tN1r - Ramp time 1. The time the controller will take to
charge the chamber temperature from its present tem-
perature to the value of Set point 1. This time may be lim-
ited by the physical capabilities of the furnace.
tN1S - Dwell time 1. The length of time the controller will
hold the furnace at the Set point 1 temperature.
NOTE
When examining the parameters, if you depress
and release either the “SEL,” “UP,” or “DOWN” but-
tons and more than 1 minute elapses before the
buttons are used again, the display screen will au-
tomatically switch to displaying chamber tempera-
ture. If this happens, you will have to step through
each parameter until you reach the point at which
the interruption occurred. The parameter values
you checked earlier, however, will not be lost or al-
tered.
O
PERATION
OF
4 R
AMP
& 4 D
WELL
P
ROGRAMMABLE
M
ODELS
