Precision Link Irrigation System Manual

The AgSense Precision Link system centers around the interaction between the Precision Point Control III (PPC III) panel and the AgSense Precision Link panel. These two components communicate with each other, enabling remote control and monitoring capabilities. The PPC III incorporates a position sensor, utilizing either an encoder or GPS for precise location tracking. A key aspect of the system is the AgSense website subscription, providing internet-based access to operational information and control features. The system's operation begins with the pivot pressurizing, triggering the water pressure start switch. This initiates movement, powering up the PPC III panel, which then establishes communication with the Precision Link. The system's functionality, including remote control, depends on seamless communication between these components. A critical requirement is that the PPC III must have firmware version 6.30 or later installed to ensure proper functionality with the Precision Link. Communication is primarily managed through Comm Port 2 on the PPC III. The system also accommodates various installation scenarios, with preferences given to setups that include a PPC III panel at the pivot point, a T-L Allen Bradley panel, and an automatically controlled water pump (wired or wireless via AgSense Crop Link), along with a water pressure start kit.

While the AgSense Precision Link is designed for broad compatibility, optimal functionality is achieved with specific configurations. The system is designed to seamlessly integrate with a PPC III panel at the pivot point, ensuring effortless communication and comprehensive control. For installations using alternative control panels, the system works well with T-L Allen Bradley panels located at either the pivot point or the engine. The system’s capacity for remote water pump control is especially beneficial in electric-driven systems. This requires that either wired control or wireless control via AgSense Crop Link be employed. Similarly, for electric-driven systems, having a water pressure start kit installed ensures smooth and reliable system initiation. These preferred installations ensure seamless integration, maximizing the Precision Link's capabilities and minimizing potential compatibility issues.

For electric-driven systems aiming for full functionality, the system's operation is initiated by issuing a start command through the AgSense website. Upon receiving this command, the Precision Link activates its water pump relay and start relay, initiating a 'wet' start. This approach ensures the system is fully primed before operation begins. A 'wet' start implies the system starts with water already present in the lines, while a dry start is possible, but then certain functions of the website will not be functional. This streamlined process leverages the remote control features offered by the website, simplifying the start-up sequence and reducing the need for manual intervention. The system’s reliability and ease of use are enhanced by this integrated approach.

Effective communication between the Precision Link and the PPC III is contingent upon the correct firmware version being installed on the PPC III. The required firmware version is 6.30 or later. Verifying the firmware version is simple; check the title screen when the PPC III is first powered on. Furthermore, the system utilizes Comm Port 2 of the PPC III for communication with the Precision Link. Ensuring proper wiring to this port and correctly setting the jumper for RS232 communication are critical steps for establishing a reliable connection. This communication is bidirectional, allowing for feedback and monitoring. The absence of correct firmware versions will lead to various problems, so it is imperative to check that the firmware is up to date.

Installing the Precision Link box involves strategically positioning it adjacent to the PPC III panel on the pivot point, or on whatever structure the PPC III is mounted on. Proximity is crucial for convenient cable routing between the two components. Equally important is maximizing antenna height and ensuring it remains unobstructed for optimal signal strength. These seemingly simple steps play a significant role in system performance and reliability, ensuring consistent and reliable communication. Furthermore, this optimal installation also aids in the Load Control Auto Restart function. The antenna placement impacts communication, data transmission, and overall system efficiency.

The physical installation of the AgSense Precision Link (PL) box is crucial for optimal performance. The instructions emphasize mounting the PL box close to the PPC III panel, ideally on the same structure. This proximity simplifies cable routing between the two units, streamlining the overall installation process. However, ease of cable management should not compromise antenna performance. The instructions strongly advise maintaining the antenna as high as possible and ensuring an unobstructed line of sight. A high and unobstructed antenna position is essential for reliable wireless communication, ensuring consistent data transmission and reception. This optimal placement directly impacts the system’s functionality and dependability. The note that this placement also works well with Load Control Auto Restart highlights the importance of proper installation for advanced features.

The document details wiring instructions for integrating the AgSense Precision Link with T-L Allen Bradley pivot panels, differentiating between new and existing AgSense installations. For new installations with water pressure start functionality, the process involves rewiring a 2-pole relay for electric-driven hydraulic or water pumps. The Precision Link then controls the water pump for a wet start, initiating the system. Once water pressure builds and the water pressure switch closes, the pivot begins to move, and the PPC III receives power. Existing installations utilizing a 3-pole relay and an existing AgSense setup require a different approach. Specific diagrams, like Figure 5, guide the user through the wiring process, emphasizing the need for careful attention to detail. Both scenarios can incorporate Load Control Auto Restart; enabling this feature enhances system capabilities. Detailed wiring diagrams and clear instructions are critical for successful integration and system operation.

The document addresses installations with an offset engine water pump and water pressure start, a configuration specific to electric drives at the pivot point. This setup differs significantly from the others because the water pump cannot be started automatically from the WagNet website. In this scenario, the pivot must be started manually before the run-start switch on the engine can be activated. While automatic starting via the website isn't available, remote stop control while running wet is still functional. The document also mentions the possibility of initiating a dry start and stop through the website. This section highlights the limitations of this specific configuration and provides alternative control methods when direct website-based water pump control is unavailable. An exclamation point (!) serves as a visual indicator if communication from the PPC III is missing.

Verifying successful communication between the PPC III and the Precision Link is critical after installation. The instructions detail how to check this communication. In the PPC III panel, users navigate to the 'Test' screens, where a flashing asterisk indicates successful two-way communication. A solid or blank asterisk signifies a communication problem. The user should then change the setting to 'YES' and press ENTER. Further verification involves examining the Precision Link's display after removing its cover; a visible asterisk (*) indicates the Precision Link is receiving information from the PPC III, though it might not be sending data back. Proper wiring to PPC III Com Port 2 and setting the RS232 jumper are vital aspects of ensuring reliable communication. These steps enable users to quickly identify and resolve potential communication issues, ensuring the system functions as intended.

The WagNet website (www.wagnet.net) serves as the primary interface for remote monitoring and control of the AgSense Precision Link system. Access requires a username and password, initially provided by the dealer upon shipment. The website displays real-time operational information; however, there’s a potential delay of up to 30 minutes between field events and website updates. To ensure the website reflects the most current data, users can click the 'Refresh' button. The system itself updates the website approximately every 30 minutes, unless a significant system change occurs, in which case the update is immediate. This combination of automatic and manual refresh capabilities helps users maintain up-to-date awareness of system status and performance, balancing automation with the need for immediate information when necessary. The system also sends data through a secure server via cellular communication.

WagNet provides extensive remote control capabilities. Users can initiate a system start, confirming their intention through a pop-up window. The system supports both wet and dry operation modes. Stop commands are also available; however, for electric-driven systems, these commands only open the start and water pump relays in the Precision Link. This is to allow for remote restarting. Additional control functions include adjusting application rates ('Change Application' button), enabling or disabling automatic restart ('Auto Restart' button), and setting the Auto Stop/Reverse function for the PPC III. These commands transmit information to the system, resulting in changes on both the website and the field equipment. A one-minute delay is imposed between commands to avoid overloading the system. Changes to direction, application rates, end gun tables, auto stop/reverse, and auxiliary application tables are synchronized between the field equipment and the WagNet interface; updates made in one location automatically propagate to the other.

The WagNet website allows for detailed configuration of auxiliary application rates and end gun settings. Auxiliary application rates can be set independently for forward and reverse directions, with up to four different areas configurable for each direction. End gun areas are defined to specify where the end gun should be activated. These areas are entered in ascending order (clockwise) starting at 000 degrees, with the possibility of an area spanning from 000 degrees to 000 degrees again. The system prevents programming across the 000-degree mark; instead, separate areas must be defined. The 'Change Application' button is used for standard forward and reverse directions; it will not change active auxiliary applications. After defining end gun areas and auxiliary application tables, users must click 'Save & Send' to save to the PL and PPC III. Both the PL and PPC III must be running for this save and send to occur. A confirmation pop-up window appears to verify the successful application of these changes. The graphical display area on the website shows application rates and end gun settings.

The WagNet interface allows for enabling or disabling the Auto Restart feature for electric-driven machines with load control. When enabled, this feature automatically resumes operation after a power outage. However, power loss and restoration will not generate safety messages when Auto Restart is active. Instead, text or email alerts can be configured for power ON/OFF events. The system provides safety messages and alerts via the website and email/text upon system changes and specific safety events. These safety features ensure system reliability and inform operators of critical events. These messages are sent instantly, with the exception of angle changes, which are reported at standard intervals. The 'Cancel Auto Restart' button disables this feature, preventing automatic restart after power restoration.

The WagNet website includes a 'PPC III' tab, which displays various PPC III system setup parameters and position sensor information. However, this tab is read-only; modifications to these settings must be made directly on the PPC III panel itself. The website primarily acts as a monitoring and control interface, leaving the detailed configuration of PPC III settings to local adjustments. The information provided on this tab serves as a reference for the current system setup and sensor parameters. This separation of control and monitoring functions enhances system management and facilitates local adjustments as needed.

A primary safety mechanism addresses communication loss between the PPC III and the Precision Link (PL). If communication is interrupted for more than 60 seconds, the PL generates a 'System Shutdown' error message on the WagNet website. This message alerts the operator via text or email, if these notification options are enabled. The system automatically shuts down. Upon detecting communication loss, the PL opens its Start Relay and Water Pump Relay, safely stopping system operation. The PL remains powered to allow for a restart once the problem is resolved. This immediate response helps prevent potential issues arising from prolonged communication failures and ensures that the system is shut down safely to prevent damage. The cause of the communication loss could be a low oil level or a normal stop initiated in the field.

The PPC III generates safety messages to alert the operator of various system anomalies. These messages are transmitted to the WagNet website and may trigger email or text alerts. Possible safety messages include: Overwater Safety, Auto Stop Safety, ET Sensor Safety, End Comm Lost, GPS Comm Lost, GPS Not Set, GPS Error, and Wrong Direction. The system design incorporates a delay in shutting down the PPC III after a safety message is generated, allowing time for communication with the PL before power is lost. This crucial delay enables essential information exchange before system shutdown, ensuring safe and informative failure reporting. The operator will receive a notification on the website and knows they will need to manually restart the system at the field site.

The document outlines two scenarios for system shutdown. Option 1, requiring Auto Restart to be enabled on the website, allows for automatic system restarts after a temporary interruption. If the T-L Allen Bradley panel is disconnected, or communication is lost for more than 60 seconds, the PL generates a 'System Shutdown' message on the website and sends an alert. The PL opens its relays and then remains powered, ready for automatic restart. In this case, it's important to note that power loss and restoration with auto-restart enabled will not generate safety messages, but texts and emails can be configured for power ON/OFF events. Option 2 describes a safety shutdown initiated by the PPC III due to some error. In this case, the shutdown of the PPC III is delayed, giving the system time to communicate with the PL before the power is lost. The operator will be made aware of the shutdown and that a remote restart will not be possible. The user will need to go to the field to restart the system.

The system can be stopped locally using the PPC III System Switch. If the Remote-Local Switch is in the Remote position, changing the PPC III System Switch to Stop will power off the relays in the Precision Link, shutting down the system completely. The system also includes a comprehensive error-handling mechanism to manage communication problems between the PPC III and PL. If communication is lost during normal operation, a 'System Shutdown' message appears on the WagNet website. This clear indication of a problem allows the operator to take appropriate action to diagnose and resolve the underlying issue. The system provides various error messages to help pinpoint the cause of a shutdown, making it easier for the user to troubleshoot the issue and restore normal operation.

Accessing the WagNet website (www.wagnet.net) is the first step in managing the AgSense Precision Link system. Login credentials—username and password—are initially set by the dealer and provided to the customer. These credentials become available on the dealer's login page on the day the unit ships. If a user needs to retrieve their login information, they should contact their dealer or AgSense directly. This initial setup ensures secure access to the system and establishes a point of contact for any login-related issues. This emphasizes the importance of proper communication between the user and the dealer, ensuring a smooth transition between purchase and system operation. The website itself is the central hub for managing and monitoring the entire irrigation system.

Each Precision Link unit requires initial setup and configuration via the WagNet website. This crucial step ensures the system is properly tailored to the user's specific requirements and operational parameters. The website provides guided configuration options, although users are also directed to the AgSense Technical Manual for more detailed assistance. Navigation within the website utilizes a left-hand tab area, from which users can select 'Installation Guides' and then choose the relevant year for their system—for example, 2013. The site provides clear steps for getting started with the system. Once setup is complete, the user can click the 'Start' button to begin the irrigation process; a confirmation is requested to ensure the command is intentionally executed. This phased approach to configuration facilitates a user-friendly setup while providing access to comprehensive guidance.