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Carrying out the automatic setting
The automatic setting can be activated both before the first heating (cold start, see
picture) and when the setpoint has already been reached (warm start, see picture).
If the automatic setting starts with a process value that is far away from the setpoint
(cold start), the warm-up phase is started. When the set point is reached (warm
start), a waiting cycle begins. The waiting cycle is 2 times the integral time (TI1 or
TI2, depending on the setting). The double integral time allows the process to
stabilize. In the first section, we speak of "pre-regulation". After the waiting cycle the
learning cycle begins, the control behavior is changed from PID to ON-OFF, this
section is also called readjustment. In the learning cycle, the controller tests the pro-
cess behavior, the measured values are used to determine the optimum PID settings.
At the end of two ON-OFF control cycles, the UREG200 switches back to PID control
mode and stores the settings in non-volatile memory. When the process is finished,
the display stops flashing and the controller goes into normal PID control mode with
the new PID values.
Cold start Automatic setting
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