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N20K48 Modular Controller
allows you to create a behavior profile for the process, called RAMP AND SOAK PROGRAM. You can set
up to
20 different profiles
with
9 segments
each. You can also create longer profiles of up to 180 segments by linking 2 or more
profiles.
The figure below shows an example:
Ramp and soak program example
After you define and execute the program, the device starts to generate the SP according to the created program.
To execute a program with a smaller number of segments, you must program 0 (zero) for the time values of the segments that follow the
last segment to be executed.
SP
SP1
SP2
SP3
SP0
T1
T2
T3 T4=0
time
Example of a program with few segments
The Program Tolerance function (
PtoL
), present in the Configuration (
Cfg
) >> Programs (
PROG
) cycle, defines the maximum deviation
between PV and SP during program execution. If this deviation is exceeded, the time count will be interrupted until the deviation is within
the programmed tolerance (gives priority to SP). If the tolerance is set to 0 (zero), the controller will execute the defined program without
considering any deviations between PV and SP (gives priority to time).
The configured
time limit
for each segment is 9999 and can be displayed in seconds or minutes, depending on the time base configured.
5.1
PROGRAM LINK
You can create a large, more complex program, with up to
180 segments
, by linking
20 programs
. Thus, at the end of a program, the
controller will immediately start executing another one, as configured in the
Link Programs
(
LP
) parameter, present in Configuration (
Cfg
)
>> Programs (
PROG
) cycle.
You can connect a program to itself or the last program to the first program so that the device runs a program (or programs) continuously.
SV
Example of linked programs
5.2
EVENT ALARM
The Event Alarm function allows you to configure an alarm to be trigger in specific segments of a program.
To configure an event alarm, you must access the Alarm cycle (
Cfg
>>
ALM
), select the desired alarm (
Fu.A1
,
Fu.A2
,
Fu.A3
or
Fu.A3
)
and configure it in Event Alarm (
rS
) mode. Then you must access the Program cycle (
Cfg
>>
PROG
) and configure parameters
PE1
to
PE9
with the desired alarm numbers (1, 2, 3, 4).
If the Program Tolerance (
PtoL
) parameter, located within the Program Cycle (
Cfg
>>
PROG
), is other than 0 (zero), the controller will wait
for the PV to reach the first program setpoint SP0 before running the program. Otherwise, it will be started immediately.
Upon returning from a power outage, the controller resumes program execution from the beginning of the segment in which it was
interrupted. For more information about the alarm types, see
section.
For more information about the parameters of each cycle, see
section.
5
RAMPS AND SOAKS PROGRAMS