Chapter 5: Control Functions and Operating Instructions
DTM temperature controller operating manual
Figure – Positive Deadband Figure – Negative Deadband
ON_OFF:
When set for heating output, if the PV value is greater than the SV value, the output will be [Off];
when the PV value is smaller than the [SV value - adjustment sensitivity configured value],
the output will be [On].
When set for cooling output, if PV value is greater than the [SV value + adjustment sensitivity
configured value], the output will be [ON]; when the PV value is smaller than the configured
value, the output will be [Off].
Figure –The Deadband is when ON-FF controlling
Programmable PID:
Programmable refers to the fact that the SV value is not a fixed value, and PID control can cause
the PV to move in accordance with the users temperature setting curve. The following steps can
be used to set the temperature curve: The first step is to select one of the 8 patterns provided
by this device. Each of these patterns has 8 [steps], and these [steps] can be used to set the
desired [Step SV] and [Step time], which will determine the temperature curve and arrival time.
Each pattern provides one [linked pattern], [Cycle count], and [End step], which are used to
adjust the linkage between different patterns, the number of times a pattern is run, and the
maximum number of steps needed for each pattern.
The programmable PID must first set a [Start pattern] and [Start step] before beginning
implementation. When the [running time] of the initial step is 0, it is necessary to set an [Start
slope] determining the temperature control slope for the temperature increase from room
temperature to the initial steps target temperature. The following are definitions and
explanations of terms:
A. Start pattern: Setting procedure control implementation begins from what pattern
B. Start step: Setting procedure control implementation begins from what step
C. Start slope: If the time of the initial step of the initial pattern is set as 0, it will be necessary
to set an initial slope, which will cause the temperature to rise from room temperature to
configure the temperature value
D. Steps: The two parameters Step SV X and Step time T express that the SV value must rise
to temperature X after time T. If the target temperature X is the same as the previous set
point, this process is referred to as "Soak." Otherwise, the process is referred to as "Ramp."
Accordingly, procedure control is also known as "Ramp Soak" control. The first
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