Chapter 7
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Envizio Pro™ and Envizio Pro II® Installation and Operation Manual
Dual Loop Control
The dual loop control feature is designed for use with low application rates and requires a pressure transducer
with a liquid application system controlled with a PWM valve. The dual loop feature uses both the flow meter to
monitor liquid product flow and a pressure transducer to monitor liquid product pressure controlling a pump to
enhance the control response during operation at low application rates. The default setting for this feature is
disabled.
If the dual loop control feature is enabled, the valve cal and valve cal 2 values programmed during the initial
field computer configuration will be replaced with the flow cal and Sgain values.
Standby Pressure (PWM Valves Only)
The standby pressure enable selection allows the operator to toggle the standby pressure feature on or off and
enter a minimum pressure to maintain when all section or the master switch is turned off. Refer to the
section on page 108 for information on the standby pressure value.
Note:
To enable the standby pressure feature, the product control system must have a PWM valve
controlling a liquid application system and a pressure transducer connected to the control node. If
these requirements are not met, the console will automatically disable the standby pressure
feature. When enabled, the standby pressure setting will replace the ‘Preset PWM’ setting on the
Valve Calibration screen. Review the Preset PWM section on page 108.
Alarm Settings
From the Home screen, touch the Tools Menu icon and select the Planter icon from the System menu. Touch
the Alarm Settings button from the Planter Control screen to display the Alarm Settings screen. The Alarm
Settings screen is used to set the values at which the field computer will display visual alarms on-screen. The
Alarm Settings screen also allows the operator to enable an audible alarm tone when the visual alarm notice
displays.
Note:
Some alarm settings or features may be available only in specific control modes or when the field
computer detects specific components or features on the CANbus.
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