AUBER INSTRUMENTS
WWW.AUBERINS.COM
2020.06
P7/10
For example, step 1 has step segment 1 (ramp segment) and step segment 2
(soak segment). To jump to the soak step of 2
nd
step, change Pro to 4.
Step set temperature (C[n]):
is the set point of step n (soak step) or end
temperature of step n (ramp step).
Step timer r[n] & t[n]:
This controller has two separate timers for every steps.
Step ramp timer (r[n])
is the ramp up time from previous step (n - 1) to current
step n. Step soak timer (t[n])
is the time to hold at current step set temperature
C[n]. Step ramp timer has higher priority than step soak timer, so this controller
will run ramp timer at first (if enabled) then run soak timer.
Running time:
Running time is how long the current step has been running.
When the running time reaches the total step time (r[n] + t[n]), the program will
jump to the next step automatically.
Jump:
Go to a specified program step. This step can be any steps in the program
(step number 1 to 32). While checking the current step number, if the step
number is modified, the program will also jump.
Run (
run
):
The program is being executed.
When the program is under the
“run” status,
the “A/M” indicator is solid on,
the timer counts down, and the set
point value may change according to your set program.
Hold (
hold
):
The execution of the program is paused.
When the program is
on
“hold”, the “A/M” indicator should be blinking,
the temperature is still being
controlled by your current set temperature, but the timer is paused.
Stop (
stop
):
Execution of the program is stopped. When the program is
stopped, the lower window will flash between
“stop” and the current set value,
the timer and the output control will stop.
Power interrupt:
It means the power has turned off or an unexpected power
failure has occurred during running status. Four handling modes are available to
the user. Please see 5.3.18 for details. Manually powering off the controller while
the program is running is also considered as an occasion of power interrupt.
Safety-start:
If the difference between the PV and SP is larger than safety-start
band (SSb) during the soak step,
controller will put program to “hold”,
A-M
indicator will be blinking, and the
timer won’t start running until
PV falls within the
SSb. During this time, controller will try to bring the temperature to the SP of the
current step as fast as possible. This safety-start feature is useful when the user
is very strict about the temperature and the time of a critical step.
6.2.
Program
6.2.1.
Program Setup (RUN
≠ 0
, default mode)
Press and hold both SET key and A/M key together for 3s
to bring the
controller into the program setup mode. The controller will show the current step
number in the top window “C XX” and show the set temperature in the lower
window. Use the A/M key to choose which digit to edit (indicated by a flashing
decimal point), and use the UP or DOWN arrow key to adjust the set temperature
(-1999 to +9999). Then press SET key to save the change and go to the step
ramp time
. The top window will show “
r
XX”, and the lower window will show the
default time. Use the UP, DOWN, or A/M key to change the value, then press
SET key to confirm and
go to the step soak time. The top window will show “t
XX”, and the lower window will show the default time. Use the UP, DOWN, or
A/M key to change the value, then press SET key to confirm and go to the next
step. At each program step, the set temperature, the set ramp timer and soak
timer are displayed in turn. Repeat this operation until all steps in your program
have been entered. You don’t
have to use/edit all 32 steps.
Note 1
: The above operation is inhibited if this controller is locked. Please see
section 5.3.9 for the details of LOCK parameter. Even the controller is under
single step mode (RUN = 0), user can still get access to all the ramp soak
settings, though they are not in use.
Note 2
: To exit the program editing mode, (1) press and hold both SET key and
A/M key together for 3s, or (2) leave the key pad untouched for 10 seconds.
6.2.2.
Step Timer
Every program step has two different sections: ramp section and soak section.
Both sections are using the same set temperature C[n], but both sections have
different timers. Timer for ramp section is r[n]; timer for soak section is t[n]. Ramp
section has higher priority than soak section. The controller will run ramp section
at first (if available), then run soak section later (if available).
Timer units for both timers are in minutes or seconds (see parameter SEC,
section 5.3.16). The valid range for step ramp timer r[n] is from 0 to 2000, If it is
set to 2000, it means it will ramp up to C[n] as fast as possible (step 1 ramp timer
r01 needs to be 2000). The valid range for step soak timer t[n] is from 0 to 9999.
6.2.3.
Program Ramp
Ramp means change the temperature from one point to another during a
specified time. To program a ramp, you need to set the start temperature C[n-1],
the end temperature C[n], and the ramp section timer r[n]. The ramping speed
is:
V = (C[n] - C[n-1]) / r[n].
During this ramping step, the displayed set temperature will linearly change from
C[n-1] to C[n] in proportion to the time that has been past in this step. For
example, at step 3, you want the controller to ramp up from 200 to 300 degrees
in 50 minutes, then you’ll ne
ed to set
C02 = 200˚F, C03 = 300˚F
, r03 = 50min.
The ramp up speed is 2˚F/min. If this step has been run for 10min
at same speed,
C03 needs to be 220˚
F.
The ramping speed should be less than or equal to the maximum ramping speed
that the current system can achieve at full power. In other words, the ramping
time should be longer than the minimum time needed for the system to jump
from C[n-1] to C[n]. Otherwise, the process temperature will gradually fall behind
the schedule. For example, the maximum heating speed of an electric water
kettle is 20˚F/min, but the ramping step is set as C01 = 90˚F, C02 = 212˚F
and
r02 = 1min. The controller will not be able to achieve this goal. In the end of this
step, the water temperature is probably at 110˚F.
Note for step 1:
r01 is the ramp up timer for step 1. r01 needs to be 2000, it
means controller will ramp up to C01 (step 1 set temperature) as fast as possible.
6.2.4.
Program Soak
The soak section maintains the temperature for a specified time. The soaking
time is specified by soak timer t[n]. To program a soak, you need to set the step
soak timer t[n], so this controller will soak at step set temperature C[n] for a
duration of t[n]. For example, at step 3, the user wants the parts to be soaked in
the oven at 200˚F for
60 minutes, then the program for this step should be C03
= 200˚F, t03 = 60min.
6.2.5.
Safety Start
When the program is running, this controller will check whether the reading
temperature is within the safety start band (SSB, see section 5.3.19 for definition).
If the temperature falls within this range, the program will continue to run and
timer will be counting normally. If the reading temperature is out of this range,
the program will pause. This controller will try to reach the set temperature but
timer will
be paused until this condition is satisfied. This feature is called “safety
-
start”.
This feature is applied on both ramp timer r[n] and soak timer t[n].
If the maximum speed of a system is unknown or varies with environmental
conditions, users can use the “safety
-
start” feature to ensure that the
temperature and the time during a ramp/soak step are kept within a reasonable
range required by the process.
