Example:
Set point = 7.0°C
Hysteresis = 0.5°C
The hysteresis range of 0.5 is evenly distributed around the set point. The controller
becomes enabled at 6.75°C and disabled at 7.25°C.
The differential is therefore 0.5°C = hysteresis
8.7.5 Max./min. limit value
The threshold setting monitors the maximum deviation of the actual value. When you reach
the predetermined limits, the alarm relay is activated and a related message appears in the
status bar.
The alarm message and display may be delayed for an adjustable time.
8.7.6 Alarm period
Once the predetermined limit values have been reached, the alarm message is delayed until
the scheduled time. If you set the numerical value to 0 sec, the alarm message appears
immediately (without delay).
8.7.7 Dosage monitoring
If dosing is performed with 100% capacity for a longer period than the set dosing time, dosing
will be interrupted and an alarm message will appear. Once the predetermined limits have
been reached, the alarm relay is activated and a related message appears in the status bar.
The alarm message must be confirmed by switching from Automatic to Manual Operating
mode. If you set the numerical value to 0 min, the alarm message appears immediately (without
delay).
8.8 Manual operating mode
Manual mode is switched automatic on the main display screen for measurements by pressing
the right arrow.
8.8.1 Manual controller mode
The manual mode allows you to act on the controller outputs by neutralizing the settings defined
for automatic operation.
The variables managed by the controller can be set in the controller's manual settings. Each
controller can be set separately. The output signal provided for the controller is managed
directly, such as the relay, analog output, etc.
The preset monitoring type for the controller is used for monitoring, pulse frequency or pulse
intervals.
For example, the action of a single, normally open relay is managed in manual mode, by
adjusting to 100% for a period of X minutes when closed.
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