User Manual

48-7009-E 6-20
■ Integral time setting
SEt04
CNt
Setting content
Initial value
18
Ｉ
0 to 3600 (seconds)
0
Set the integral time.
Setting of 0 second results in no integral operation.
Both heating and cooling sides share to use this setting in the heating cooling control. (Individual setting is not allowed.)
The integral operation is an operation that makes the deviation between the setting value and measurement value, which is
generated in the proportional control, approach 0.
Temperature
Time
Deviation
Setting value
(SV)
The integral time is a value, in the unit of second, that defines intensity of the integral operation.
A smaller time value setting is equivalent to a more intense operation. (Because the value deviated is attempted to return in
the set time.)
■ Derivative time setting
SEt04
CNt
Setting content
Initial value
19
d
0 to 3600 (seconds)
0
Set the derivative time.
Setting of 0 second results in no derivative operation.
Both heating and cooling sides share to use this setting in the heating cooling control.
The derivative operation is an operation that works to return fast to the original control state by supplying a large operating
amount against drastic disturbances.
The output provided by the derivative operation is proportional to the time derivative value of the measurement value.
The proportional and integral operations are corrective operations, so their responses tend to be slow to drastic temperature
changes (or disturbances). The derivative operation supplements such a shortcoming.
The derivative time is a value, in the unit of second, that defines intensity of the derivative operation.
A larger time value setting is equivalent to a more intense operation. (Because the interval to pick a variance becomes larger.)