54
t.05...t.08
…3
PROFILES
…3.5
Ramp/Soak Profile Program
0
rAtE
t.07
0.0
tIME
t.07
0
ENd
t.06
0
Strt
t.05
OFF
GUAr
t..08
•1
•2
•1
Displayed only if segment start and end values are the same, or the Ramp Type is set to '
tIME
'.
•2
Displayed only if segment start and end values are different and the Ramp Type is set to '
rAtE
'.
Segment Start Value
The segment start value can only be set if it is the first segment of a program.
[–999 to 9999 in engineering units]
Note. A
Ramp
has different start and end set point values. A
Soak
has the same start and end set point values. Adjacent segments of
different
Ramp
or
Soak
programs MUST have the same start and end
values, unless an intermediate 'spacer' segment is used.
The start value of a segment can only be adjusted if the segment is the
first of the selected program.
Segment End Value
[–999 to 9999 in engineering units]
If segment start/end values are the same or the ramp type is set to
'
tIME
', advance to the
Segment Time
frame. If segment start/end values
are different and the ramp type is set to '
rAtE
', advance to the
Ramp Rate
frame.
Segment Time
[0 to 999.9]
The time units (hours or minutes) are configured in
Ramp/Soak Time Units
frame,
Profile Control Page.
Ramp Rate
[0.001 to 9999 engineering units per time period]
The time period (hours or minutes) is set in the
Ramp/Soak Time Units
frame,
Profile Control Page
.
Example – If a ramp of 10
°
F at 2
°
every minute is required, the ramp rate
value entered is 2.0 (in the minutes time base).
Note. If the
Program Time Units
parameter is set to minutes, the
engineering units value is displayed to an extra decimal place.
Guaranteed Ramp/Soak Hysteresis
HI.LO
– hysteresis applied above and below set point
('
H.HLd
' set if PV > [SP + Hysteresis] or
PV < [SP + Hysteresis])
LO
– hysteresis applied below set point
('
H.HLd
' set if PV < [SP – Hysteresis])
HI
– hysteresis applied above set point
('
H.HLd
' set if PV > [SP + Hysteresis])
OFF
– hysteresis not applied, ramp/soak not guaranteed.
Continued…