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5 Advanced Operations
E5@C Digital Temperature Controllers User’s Manual (H174)
5-
6 Usin
g th
e SP Ram
p
F
unct
ion
to
Lim
it th
e SP Cha
n
g
e
Rat
e
5
5-6-1 SP Ramp
5-6
Using the SP Ramp Function to Limit
the SP Change Rate
The SP ramp function is used to restrict the width of changes in the set point as a rate of change. When
the SP ramp function is enabled and the change width exceeds the specified rate of change, an area
where the set point is restricted will be created, as shown in the following diagram.
During the SP ramp, control will be performed not for the specified set point but rather for the set point
restricted by the rate of change set for the SP ramp function.
The rate of change during an SP ramp is specified using the SP Ramp Set Value, SP Ramp Fall Value,
and SP Ramp Time Unit parameters. The SP Ramp Set Value parameter is set to OFF by default and
the SP Ramp Fall Value parameter is set to SAME by default, i.e., the SP ramp function is disabled.
Changes in the ramp set point can be monitored in the Set Point During SP Ramp parameter (Opera-
tion Level). Use this parameter when monitoring SP ramp operation.
The SP ramp function operates in the same way when switching the set point using the multi-SP func-
tion.
Parameters
z
Operation at Startup
If the SP ramp function is enabled when the Controller is turned ON or when switching from STOP to
RUN mode, the process value reaches the set point using the SP ramp function in the same way as
when the set point is changed. In this case, operation is carried out with the process value treated as
the set point before the change was made. The direction of the SP ramp changes according to the
relationship between the process value and the set point.
5-6-1
SP Ramp
Display
Parameter
Description
Level
sprt
SP Ramp Set Value
To limit the SP rate of
change
Adjustment Level
sprl
SP Ramp Fall Value
To limit the SP rate of
change
Adjustment Level
spru
SP Ramp Time Unit
Unit for setting the SP
Advanced Function
Setting Level
alsp
Alarm SP Selection
Alarm SP selection
Advanced Function
Setting Level
SP
SP ramp
SP after change
SP before change
Point of change
Time
SP ramp set value
SP ramp time unit (s/min/h)
000
000
Содержание E5C series
Страница 2: ......
Страница 18: ...Conventions Used in This Manual 16 E5 C Digital Temperature Controllers User s Manual H174 ...
Страница 34: ...1 Introduction 1 10 E5 C Digital Temperature Controllers User s Manual H174 ...
Страница 98: ...3 Part Names and Basic Procedures 3 20 E5 C Digital Temperature Controllers User s Manual H174 ...
Страница 310: ...6 Parameters 6 94 E5 C Digital Temperature Controllers User s Manual H174 ...
Страница 326: ...7 User Calibration 7 16 E5 C Digital Temperature Controllers User s Manual H174 ...
Страница 364: ...A Appendices A 38 E5 C Digital Temperature Controllers User s Manual H174 ...
Страница 365: ...Index 1 E5 C Digital Temperature Controllers User s Manual H174 I Index ...
Страница 370: ...Index 6 E5 C Digital Temperature Controllers User s Manual H174 ...