Red-lion TSC User Manual download pdf (Page 69)

ON/OFF CONTROL

The controller can operate in the

ON/OFF control mode by setting the

proportional band = 0.0. The ON/OFF

control hysteresis band (CHYS) parameter

can be used to eliminate output chatter

around setpoint. The cooling output can

also be used in the ON/OFF control by

setting the relative gain = 0.0

The phase of the control action can be

reversed by the output control action

parameter. ON/OFF control is usually

characterized by significant temperature

oscillations about the setpoint value. Large

control hysteresis values makes the

oscillations larger. ON/OFF control should

only be used where the constant oscillations

have little effect on the process.

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MAIN CONTROL OUTPUT (OP1)

COOLING OUTPUT (OP2)

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