Autonics TM Series - Page 58

6 Parameter Settings and Functions
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6.3.3.3 Derivative time
In accordance with the deviation of the ramp, the time taken for the MV gained from derivative
operation to reach the MV gained from proportional control is called the derivative time.
Setting
group
Preceding
condition
Parameter
Setting
range
Factory
default
Unit
Control
Operation
Heating, PID Heating_ Derivation Time
0 to
9999
0 Sec.
Cooling, PID Cooling_ Derivation Time
Derivative control is not conducted if the derivative time is set to 0.
6.3.3.4 Control period
If relay or SSR is used to send out MV under proportional control, the output is on for a fixed
amount of time (within the control period, as a percentage of the MV) and then remains off. The
preset period when output ON/OFF takes place is called the proportional control period.
Control using SSR drive voltage output has a faster response than that of relay output. Therefore,
by configuring a shorter control period, more responsive temperature control is achieved.
Setting
group
Preceding
condition
Parameter
Setting
range
Factory
default
Unit
Initial Setting
Heating, PID Heating_ Control Time
0.1 to
120.0
20.0 (RY)
2.0 (SSR)
Sec.
Cooling, PID Cooling_ Control Time
If using heating and cooling control, configure each control period separately for heating and
cooling.