￿The pump is automatically switched into auto-restart mode and displays the ! icon. The only keys active are STOP, AUTO/MAN, DIRECTION and START (available only as an extended keypress to toggle keypad lock). UP and DOWN keys are available if manual scaling has been set (see below).

￿If the remote direction input is active and the direction-enable link is applied, the DIRECTION key is disabled. If keypad lock is set, only STOP and START (available as an extended keypress to toggle keypad lock) are active.

￿The pump displays whichever of four auto running screens is appropriate according to the previously selected auto mode - 4-20mA or 0-10V with or without scaling in place.

￿The auto running screens display four pieces of information: the speed at which the pump rotates after receiving a low signal on Analogue 1 (4mA or 0V); the speed at which the pump rotates after receiving a high signal on Analogue 1 (20mA or 10V); the set speed (that is: the speed at which the pump is current- ly rotating according to the analogue speed signal and the analogue scaling sig- nal if scaling is set); and the flowrate in the units selected (see 18.8 Flow units). The scaling percentage is also displayed if it is set.

￿If manual scaling is enabled using the Setup menu (see 18 Setup), the scaling percentage can be adjusted between 0% and 100% using the UP and DOWN keys.

￿The pump responds to remote digital inputs. If the run / stop input stops the pump, the bottom line of the auto running screen shows “Remote stop”. When it starts the pump again, this will disappear and the pump returns to normal running mode.

￿If the pump is stopped because a leak is detected, the screen displays “LEAK DETECTED. Check and reset, then press Stop”. See 25.1 Error codes.

￿The remote status outputs operate fully.

How to get out of auto operation

￿Pressing the AUTO/MAN key displays three options: Analogue, Manual and Network. Use the UP and DOWN keys to choose and press ENTER to con- firm.

￿Selecting Manual returns the pump to manual operation. Using this method of changing from AUTO/MAN, the pump retains the set speed from its pre- vious operation in manual mode in a stopped condition. See 14 Manual operation.

￿Selecting Network puts the pump into network (RS485) mode. See 24 Network control and operation.

￿Selecting Analogue returns the pump to analogue mode. It responds to the analogue signal as soon as this is done and shows the “AUTO” icon.

￿Alternatively, make the remote auto / manual input go low (0V). The pump returns to manual operation and retains the set speed and run status from its previous operation in analogue mode.

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Watson & Sons 520DUN user manual How to get out of auto operation
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520DUN specifications

Watson & Sons 520DUN is a state-of-the-art model that has garnered attention for its exceptional performance and innovative technologies. Designed for agricultural applications, this machine combines durability, efficiency, and ease of use, catering to the needs of modern farmers.

One of the standout features of the 520DUN is its robust engine. Equipped with a high-performance diesel engine, it offers impressive horsepower, allowing it to handle a variety of demanding tasks with ease. This engine is designed for fuel efficiency, ensuring that operators can complete their work without frequent refueling. The powertrain is complemented by an advanced transmission system that enables smooth gear shifts, enhancing operator comfort during long hours of operation.

The 520DUN also boasts a remarkable load capacity, making it an ideal choice for transporting heavy materials. Its rugged build quality ensures that it can withstand the rigors of daily use, providing a reliable solution for farmers and contractors alike. The robust chassis and reinforced components were designed to maintain stability and control, especially when navigating uneven terrain.

Incorporating cutting-edge technologies, the Watson & Sons 520DUN features precision farming capabilities. With GPS integration, operators can efficiently manage their fields, optimizing planting and harvesting processes. This technology not only increases yield but also minimizes inputs, making farming more sustainable and economically viable.

User ergonomics were a significant consideration in the design of the 520DUN. The operator's cabin is spacious and well-equipped with intuitive controls, providing a comfortable working environment. Operators will appreciate the advanced display panel that offers real-time data on performance metrics, fuel consumption, and maintenance reminders. This allows users to keep the machine in peak condition and react to any issues promptly.

Safety is also paramount in the design of the 520DUN. It features reinforced safety measures, including roll-over protection systems and visibility enhancements, ensuring operator safety during operations.

In summary, the Watson & Sons 520DUN represents the pinnacle of agricultural machinery with its powerful engine, remarkable load capacity, precision technology, and ergonomic design. It is tailored for those who seek reliability and efficiency in their agricultural endeavors, making it a noteworthy choice in today's competitive market.
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