Technical information

5. CONFIGURATION RAMP & SOAK
“
Rate
”
(ramp) function
:
Prior to first operation, the controller should be fully configured. After the controller
is energized and is in normal operation mode press the
SET UP key
several times
until the
rvn
parameter is displayed. Using the or
keys change the value to
0
, this disables all outputs. After disabling all of the outputs
t
he user can now set
the basic parameters such as
Input Type
(“TYPE
”) in Cycle-3, the desired control
Set Point
(“
SP
“) in Cycle-1, the
Alarm Set Points
(“
A1SP
” and “
A2SP
”) in Cycle-
2, etc.
The first parameter that needs to be programmed is the Input Type
(
type
) in the Input Cycle, Cycle-3 (see section 5.3 page 13).
This function makes the process temperature rise gradually (ramp) from the
starting point (present PV) to a final specified value in setpoint (SV), creating a
heating ramp. The user defines the rate of rise in degrees per minute (from 0.1 to
100.0°F or °C / minute) at the “rAtE
” prompt.
To disable the ramp function set
0.0
at the “
rAtE
” prompt (default =
0.0
).
“
t SP
”
(soak) function
:
When SP is reached the temperature is leveled at this point for 1 to 9999 minutes
as programmed at the “
t SP
” prompt. After the programmed period (
t SP)
the
output control is turned Off. To restart control set 1
at the “
rvn
” prompt.
After all parameters are set, enable the controller operation by changing the
rvn
parameter back to
1
. This enables all outputs. The following menu Cycles give
information on programming each parameter.
Setting value 0
at “
t SP
” (disable the soak function) defines an infinite length
soak profile (default =
0
).
All parameter settings are stored in non-volatile memory after moving to the next
parameter or if the value has not been changed within a 20 second period.
Note 1:
Setting value 0
at “
t SP
”, if “rate function” (ramp) is disabled.
5.1 CYCLE 1 – OPERATION:
Note 2
:
After a power failure the controller will resume ramp to soak execution at
the equivalent previous ramp point. If the process temperature is the same as the
setpoint, SV, (no temperature drop) the controller will repeat the soak segment.
CYCLE 1
PV Indication
(RED display)
SV Indication
(GREEN display)
PV AND SV INDICATION:
PV:
The status display shows the present value of PV
(Temperature).
SV:
Adjust the desired temperature value (Setpoint) for the
controlled system by pressing
or
within the limit defined in
the parameter “spxl
“ in Cycle-3.
Rate
(ramp)
TEMPERATURE RATE OF RISE
: The user defines the rate of
temperature rise from the starting temperature to the value set in
SV
. Rate is defined in
°F or °C per minute
(programmable
range: 0 to 100.0
°/
minute).
Default:
0.0
See page 11 for a description of this.
“To disable the ramp function set:
Rate
=
0.0 ”.
T Sp
(soak)
TIME FOR SOAK
: Time in minutes in which the temperature will
remain at the selected
t sp
(soak setpoint in SV display). (Set: 0
to 9999 minutes).
Default:
0
See page 11 for a description of this.
Note:
Setting value 0
at “
t SP
”, if “rate function” (ramp) is
disabled.
“To disable the soak function set: t SP
=
0
”.
Rvn
RUN
: At this prompt the user sets the control output and alarms
to active or to inactive.
Default:
1
0
- inactive outputs
1
- active outputs
SoakTemperature
PV
Ramp
Time
SP
(Figure 8)
Single Ramp -
The controller allows the temperature to gradually rise from an
initial value to a final specified value in setpoint, creating a heating ramp. The user
may determine the rising time of the ramp on the controller, which defines the
velocity of the temperature in degrees per minute.
10 11