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CHAPTER 4 FUNCTIONS
This chapter explains functions of the Q64TCN.
For the functions indicated with the icon , the following terms are used, unless otherwise specified.
• Proportional band (P): includes heating proportional band (Ph) and cooling proportional band (Pc)
• Manipulated value (MV): includes manipulated value for heating (MVh) and manipulated value for cooling (MVc)
• Manipulated value (MV) for output with another analog module: includes manipulated value of heating (MVh) for
output with another analog module and manipulated value of cooling (MVc) for output with another analog module
• Transistor output: includes heating transistor output and cooling transistor output
• Upper limit output limiter value: includes heating upper limit output limiter value and cooling upper limit output
limiter value
• Control output cycle: includes heating control output cycle and cooling control output cycle
4.1 Control Mode Selection Function
A control mode can be selected using this function.This section explains selectable control modes of the Q64TCN.
(1) Standard control and heating-cooling control
There are two types of control modes in the Q64TCN: standard control and heating-cooling control.
(a) Standard control
The control method is either one of heating (reverse action) or cooling (forward action). When the control
method is heating, of a heater for example, cooling is controlled by simply turning off the heating. When the
control method is cooling, of cold water for example, heating is controlled by simply turning off the cooling.
(b) Heating-cooling control
The control method is both heating and cooling. To heat up the target subject, its heating mean is turned on,
and its cooling mean is turned off. To cool down the target subject, its heating mean is turned off, and its cooling
mean is turned on.
Common
Common