For those outdated workshops that still rely on paper cheat sheets and switch panels to switch formulas, buying an Allen Bradley 2711-T9A8 is the most straightforward solution. This 9-inch screen can work when connected to 24-volt direct current. After formatting the parameters as permission-based drop-down menus and directly sending them to the PLC, it is very suitable for multi-batch mixed production environments. Compared to the old panels with dusty surface coatings and malfunctioning screens due to dirty gloves, this one has much better light transmission and touchpad performance. Hanyite Automation Technology understands the urgency of on-site equipment maintenance and replacement. Currently, this model is in brand new condition and in stock. Place an order and it will be immediately delivered to the control cabinet for replacement.
Previously, during on-site debugging, operators wanted to check the running time or historical alarms of a certain motor. They had to go to the power distribution cabinet and flip through thick paper-based reports. This was not only slow but also prone to losing pages. After replacing with the Allen Bradley 2711-T9A8, this situation basically disappeared. This 9-inch screen fits perfectly into the original standard cutting holes, yet the display area is large enough. I made all the key data of the production line into intuitive bar charts and trend lines and placed them on the main screen. Now, when the operator walks over and glances, they can directly slide out the production volume and energy consumption curves on the screen for that day. Checking fault codes has also become a matter of just a few taps on the touch screen. The efficiency of the shift handover has significantly improved.
The most troublesome aspect of on-site maintenance is the harsh environment, especially in those workshops with a large amount of abrasive dust. With an ordinary touchscreen, within less than half a year, the screen surface would be covered with a thick layer of dust. Moreover, the operators would repeatedly poke the screen with dirty gloves, causing the touch functionality to become intermittent. However, the screen of the Allen Bradley 2711-T9A8 has well-adjusted light transmission rate and contrast ratio. Even if the surface is covered with dust, as long as it is not deliberately blocked, from the regular viewing angle of the operation console, the alarm prompt with the white text on a gray background can still be clearly seen. Moreover, its resistive touchpad responds quite accurately. Even if the operator wore a dirty cloth glove covered with oil stains to press, it could still accurately identify the position. There was no need to find a pen tip or clean the hands thoroughly to operate.
In fact, the factory director was willing to approve the budget for replacing the panels. What he was actually referring to was not the equipment cost, but the scrap cost. Previously, the batching section of our workshop relied on operators' rote memorization of parameters. During batch replacement, if they accidentally mistyped a decimal point, the entire batch of materials would be scrapped. After installing the new panels, I locked all the different batch formulas in the drop-down menu and added a secondary confirmation logic. Now, operators only need to select the corresponding formula number, and the equipment parameters will be automatically sent to the PLC, completely eliminating the waste caused by human errors. Just the reduction in the defective products in these few months has made up for the cost of replacing the screens. This is the real value it demonstrates on the production line.
The most challenging part of old panels is actually not the operation, but the troubleshooting in the later stage. Previously, if the indicator lights were not on when the equipment stopped, the electrician had to take a multimeter and test each terminal one by one to troubleshoot for an hour or so. After the Allen Bradley 2711-T9A8 was connected to the system, I directly mapped the IO faults and communication disconnections at the bottom layer to the screen. Now, whenever the equipment stops, a system overview page will directly pop up on the screen. If the communication of a slave station is lost or an analog signal is disconnected, the corresponding position on the page will turn red and flash. Maintenance personnel can simply look at the screen in front of the cabinet, take the number to check the specific wire, and no longer need to conduct a blind, all-encompassing search, significantly reducing the waiting time for equipment downtime.
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