6 Parameter Settings and Functions
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6.2.3 Ramp settings [PAR2 → RAMU/ RAMD/ rUNT]
Ramp is a feature used to configure the slope toward set value(SV). The feature limits change
rate of set value(SV) and thereby restricts sudden temperature changes (increase and decrease)
in the control subject.
Ramp is commonly used in applications where rapid temperature changes (increase and
decrease) could impact negatively on the control subject.
RAMU
Settings for Ramp-up change rate.
RAMD Settings for Ramp-down change rate.
rUNT
Settings for Ramp time unit.
Parameter Setting range
Unit
PAR2
RAMU
000 to 999 (temperature H, analog),
00)0 to 99(9 (temperature L)
000
RAMD
000 to 999 (temperature H, analog),
00)0 to 99(9
(temperature L)
000
rUNT
SEC (seconds), MIN (minutes),
HOUR (hours)
MIN -
Activating the ramp feature when the ramp is not in operation limits the change rate of Set
value(SV) based on present value (PV). Changing SV or ramp parameters while the ramp is in
operation limits the change rate of SV based on SV at the point of the change.
Control will be carried out based on changed SV (hereinafter referred to as RAMP SV) -
changed by preset change rate (slope). RAMP-Up Change Rate and RAMP-Down Change Rate
can be configured independently.
Alarm operation during RAMP will be made based on final SV.
Setting the rate of ramp change to 0 deactivates the ramp feature.
If the ramp feature has been activated, RAMP SV will be displayed on SV display part.
Ramp depending on operation status
All operations When it is 0. Inactive
OPEN, HHHH, LLLL, Auto-tuning, Switching from
Auto to Manual, Switching from Run to Stop
Irrespective of
conditions.
Inactive
OPEN, HHHH, LLLL, After Auto-tuning completed, PV
= SV
Irrespective of
conditions.
Inactive
Power On, SV Change, Switching from Stop to Run,
Switching from Manual to Auto, Ramp Rate Change
When it is not 0. Active
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