3 6 Cool Only Control
3 6 Cool Only Control
ON-OFF control, P ( PD ) control and PID control can be used for cool control.
Set OUT1 to DIRT ( direct action ). The other functions for
control,
control and
control are same as
descriptions in section 3-5 for heat only control except that the output variable
( and action ) for the cool control is inverse to the heat control, such as the
following diagram shows:
cool only ON-OFF
cool only P ( PD )
cool only PID
ON-OFF control, P ( PD ) control and PID control can be used for cool control.
Set OUT1 to DIRT ( direct action ). The other functions for
control,
control and
control are same as
descriptions in section 3-5 for heat only control except that the output variable
( and action ) for the cool control is inverse to the heat control, such as the
following diagram shows:
cool only ON-OFF
cool only P ( PD )
cool only PID
SP1+O1HY/2
SP1 O1HY/2
SP1
ON
OFF
OUT1 Action
PV
Dead band = O1HY
Time
Time
Figure 3.3 Cool Only
ON-OFF Control
Figure 3.3 Cool Only
ON-OFF Control
Setup Cool Control :
OUT1 =
Setup Cool Control :
OUT1 =
Refer to section 3-5 in which similar descriptions for heat only control can be
applied to cool only control.
Refer to section 3-5 in which similar descriptions for heat only control can be
applied to cool only control.
44
UM25001C
