Omron E5EK User Manual

4.2 Operating Condition Restrictions
E5EK
4--5
4.2 Operating Condition Restrictions
The upper-and lower-limit values of the manipulated variable can be
restrictedbytheMVlimiter,andthechangerateofthe manipulated
variable can be restricted by the MV change rate limiter.
The upper-and lower-limit values of the manipulated variable are set in
the “MV upper limit” and “MV lower limit” parameters (level 2 mode).
When the man ipulated variable calculated by the E5EK is outside of the
range of the MV limiter, actual outputs are dependent on the set value
of these parameters.
100
0
PV
Output (%)
MV upper limit value
MV lower
limit value
In heating and cooling control, the manipulated variable at the cooling
side is treated as a negative value for the sake of convenience. The
upper limit is set for the heating side (positive value), and the lower
limit is set for the cooling side (negative value) as shown in the follow-
ing figure.
100
PV
Output (%)
MV upper limit value
MV lower limit value
Heating
side
Set point
Cooling
side
0
The “MV change rate limit” parameter (level 2 mode) sets the maxi-
mum permissible change width per second of the manipulated variable.
If a change in the manipulated variable exceeds this parameter setting,
the value calc ulated by the E5EK is reached while changing the val ue
by the per-second value set in this parameter.
100
0
Output (%)
Switching point
Time
MV change rate
limit value
1 second
JManipulated vari-
able restrictions
F MV limiter
F MV change rate
limiter

Omron E5EK Specifications

General

Brand	Omron
Model	E5EK
Category	Controller
Language	English