EXOR eVO58-TST/TNT Compact HMI Human Machine Panel

EXOR eVO58-TST/TNT Compact HM Human Machine Panel: Old Machine Upgrade and Troubleshooting Guide

In the lifecycle management of industrial automation production lines, the HMI (Human Machine Interface) panel of old equipment is often the first component to face elimination or shutdown. When the original operation screen experiences screen aging, touch failure, or communication protocol incompatibility, engineers urgently need to find a replacement product that can seamlessly embed into the original control cabinet opening and be perfectly compatible with the existing PLC communication protocol. EXOR effectiveness View eVO58-TST and eVO58-TNT, as 5.7-inch TFT compact HMI panels, provide a highly practical solution for upgrading and replacing entry-level HMI applications with high cost-effectiveness and rich underlying functions.

This article will provide a detailed professional guide for engineers in the equipment maintenance and upgrade stage from the dimensions of hardware architecture selection, underlying communication topology, configuration software ecology, and troubleshooting during on-site replacement.

Core Differences in Selection: Hardware Architecture Comparison between TST and TNT

Accurately distinguishing the hardware differences between eVO58-TST and eVO58-TNT is the first hurdle before purchasing replacement parts. Both are highly consistent in terms of core display and interactive hardware: both are equipped with a 5.7-inch TFT color display screen, support 320x240 pixel resolution, have 256 color display capability and LED backlight, and adopt analog resistive touch screen. This configuration can provide clear on-site data display in packaging machinery, textile equipment, or HVAC control cabinets.

The core watershed between the two lies in network communication capabilities:

EVO58-TST: No Ethernet interface, relies entirely on the bottom serial port for data exchange.

EVO58-TNT: Integrated with 10/100 Ethernet interface, supports Ethernet based multi node data sharing, suitable for modern transformation scenarios that require networking with upper computer MES systems or SCADA systems.

In terms of storage and power down maintenance, both panels provide 4MB of Flash user memory, which is sufficient to support medium complexity image configuration, recipe, and historical alarm storage. The system has 128KB to 1MB of RAM and comes standard with a hardware RTC (Real Time Clock) with battery backup. This means that even during equipment power outages and maintenance periods, the clock inside the panel can still operate accurately, ensuring that the timestamp of fault alarm records is not misplaced, which is crucial for tracing the root cause of equipment failures afterwards.

Communication topology and interface configuration logic

The communication environment in industrial sites is often complex and intricate, with different brands of drivers and PLC protocols varying. The EXOR eVO58 series demonstrates strong inclusivity in the interface design at the bottom:

Dual serial communication: The bottom of the panel provides two independent serial ports, COM1 and COM2. According to the interface definition, both of these serial ports support three physical layer standards: RS-232, RS-422, and RS-485 (usually COM1 supports full functionality, COM2 is designed for RS-232/485 multiplexing). This endows the panel with powerful "multi drive communication capability", which can simultaneously connect an RS-485 frequency converter, an RS-232 temperature control instrument, and an RS-422 PLC.

Vertical mode support: In some special machines (such as vertical packaging machines), engineers need vertical screen display. EVO58 supports portrait mode operation at both hardware and software levels, which can be easily switched with just one click in the configuration software to eliminate the hassle of rearranging screen elements.

Physical interface layout: From the back view, the interfaces from left to right are: power terminal, Ethernet port (TNT only), COM1 serial port, COM2 serial port. This centralized bottom routing design greatly facilitates the wiring harness planning inside the control cabinet.

Configuration software ecosystem: the powerful empowerment of eDesigner

Hardware is only the carrier, software is the core that determines the project development cycle and post maintenance efficiency. EXOR has equipped the panel with powerful eDesigner configuration software.

Multilingual and Unicode support: In response to the needs of export devices, the panel supports switching between up to 10 online languages and has a built-in Unicode font library. Application text can be directly exported as a file for external translation, and then re imported, completely solving the pain point of traditional HMI rare or Chinese characters occupying internal memory.

Dynamic Data and Visualization: In addition to basic numerical and text displays, the software supports bar charts, sliders, dashboards, as well as bitmap, JPEG, and dynamic GIF images. Object properties such as visibility and position can be dynamically controlled, making it easy to simulate real-time animation effects.

Macro instructions and scripts: eDesigner comes with a powerful scripting language and editor built-in. Engineers can write macro instructions triggered by touch actions, system events, or timers. For example, when a specific alarm is triggered, a shutdown command is automatically written to the connected PLC through macro instructions, or the alarm information is sent to the server host within the local area network through TNT's Ethernet port.

Data traceability and formula management: supports data collection and trend chart display, and formula data can be stored in batches and uploaded to the host. The multi-level password protection function ensures that core process parameters will not be arbitrarily modified by unauthorized personnel.

On site replacement and common troubleshooting guide

When replacing old HMIs (such as some discontinued early text screens or monochrome screens), the primary task is to match the mechanical dimensions of the openings. Before installation, it is necessary to check the hole size markings on the back of the panel (hole A x B). If the original control cabinet hole is too large, a conversion panel needs to be processed; If it is too small, it needs to be re cut. The installation depth (D) also needs to confirm whether there is sufficient wiring space inside the control cabinet.

Common troubleshooting and avoiding pitfalls:

Black screen or backlight not working when powered on: First, use a multimeter to measure the input voltage of the power terminal to ensure that it is within the rated operating range of the device and that the positive and negative terminals are not reversed. If the power supply is normal but the screen is not displaying, check the lifespan of the backlight tube; If the screen has extremely dark display but no backlight, it is usually a fault in the LED backlight driver circuit.

Touch offset or no response: Resistive screens are prone to drift after long-term use or external pressure. You can try to perform touch calibration again in the system settings. If there is no response in the local area, it is necessary to check whether there are hidden cracks on the screen surface or whether the touch film cable is loose due to vibration.

Communication timeout or garbled data: If using RS-485/422 communication, first check if the A/B line or TX/RX line is connected incorrectly. Secondly, verify whether the communication parameters (baud rate, data bits, stop bits, parity bits) are completely consistent with the main control PLC. If there is strong electromagnetic interference on site, it is necessary to confirm whether the shielding layer of the communication cable is effectively grounded at the single end on the panel side.

System time reset to zero or formula loss: Due to the panel's reliance on internal batteries to maintain RTC clock and partial memory data, if the battery is depleted due to long-term lack of power, the time will reset to zero after power failure. It is recommended to measure the backup battery voltage when replacing new panels or conducting routine maintenance, and replace the battery while the system is powered on to prevent data loss.