YUNEX TRAFFIC ST950 - User Manual

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Summary

CPU card replacement method

Handset method

Step-by-step instructions for replacing the CPU card using a handset.

WEB interface method

Recommended procedure for CPU card replacement via the web interface.

The Yunex Traffic ST950 CPU card is a critical component for traffic signal controllers, designed for replacement and maintenance procedures. This guide outlines the process for replacing the CPU card and restoring the controller's configuration, emphasizing the importance of proper procedures due to the absence of an EPROM in this model.

Function Description:

The ST950 CPU card serves as the central processing unit for traffic signal controllers. It manages the controller's operations, including signal timing, phase control, and communication with various peripherals. The card integrates several key interfaces for connectivity and control:

Licence Container: Holds the Licence card, which resembles a mobile phone SIM card, essential for the controller's operation.
Controller Heart SD Card: Contains the "Heart" SD card, which stores critical configuration data and firmware.
I/O, IDB, LSLS (ELV) and Plus+ CIC connectors: These connectors facilitate input/output operations, inter-device communication (IDB), low-speed serial links (LSLS) for extra-low voltage (ELV) devices, and Plus+ Common Interface Card (CIC) connections, enabling the CPU card to interact with various field devices and other system components.
Ethernet connector: Provides network connectivity for remote management, data logging, and communication with other traffic management systems.
Power connector: Supplies power to the CPU card.
LSC (LV) connector: Likely for Low Voltage System Control, enabling communication with specific low-voltage components.
Program Button: Used for initiating programming sequences, often in conjunction with the Level 3 access button.
Level 3 access Button: Provides a higher level of access for configuration and maintenance tasks.
USB B connector: Used for connecting to a laptop or netbook for web interface access, facilitating configuration and monitoring.
25Way D Handset Connector: Allows connection of a standard handset (e.g., 'Oyster', 'Techterm') for local configuration and diagnostics.

Important Technical Specifications:

CPU Card Compatibility:
- Part number 667/1/46010/001 can be replaced by either 667/1/46010/001 or 667/1/46010/101.
- Part number 667/1/46010/101 must only be replaced by 667/1/46010/101. This strict compatibility ensures proper functionality and prevents system errors.
Configuration Storage: Unlike older models, the ST950 CPU card does not use an EPROM for configuration storage. Instead, configuration data is primarily stored on the "Heart" SD card and managed through restore points.
Connectivity: Features a range of connectors including Ethernet, USB B, and a 25-way D-sub connector for comprehensive connectivity options.

Usage Features:

The ST950 CPU card supports two primary methods for configuration and restoration after replacement: the Handset method and the WEB interface method (recommended).

Handset Method:

Connection: Connect a standard handset (e.g., 'Oyster', 'Techterm') to the 25-way D-sub connector.
Commands: Utilize specific commands like "PME=249" and "WIZ" to navigate menus and initiate restoration processes.
Heart Card Interaction: The handset method guides the user through selecting "Heart" options, choosing between "Own Heart" and "Restore," and confirming the last created "Restore Point" against the EM number.
Visual Feedback: The Blue LED on the CPU card provides visual cues during the process, indicating flashing during configuration and remaining ON upon completion.
Safety Procedures: Requires turning OFF signals via the Signals On/Off Switch and pressing the program button at specific steps.
Final Steps: After restoration, the controller performs standard safety checks, and the user investigates any faults using FFS (Fault Finding System) and FDS (Fault Data System).

WEB Interface Method (Recommended):

Connection: Connect to the controller via USB or Wi-Fi using a laptop, netbook, mobile phone, or tablet PC. The USB B connector on the CPU card is specifically for web interface access.
Navigation: Access the web interface through a browser and navigate to "Status and Configuration" -> "Controller, Heart" -> "Backup & Restore."
Restore Points: The interface displays "Retained restore points" and "Latest restore points," allowing the user to select the most recent valid restore point.
Automated Process: The web interface guides the user through the restoration process, displaying messages and managing the reinstatement of firmware and configuration.
Connection Interruption: The connection to the web pages will be temporarily lost during the restoration as the controller reinstates firmware and configuration.
Visual Feedback: Similar to the handset method, the Blue LED on the CPU card indicates the status, flashing during the process and remaining ON when access to the web pages is restored.
Fault Checking: After restoration, the "Fault Table" should be checked to confirm successful programming of other processors. The "System Log" provides detailed information for fault investigation.
Safety Procedures: Requires turning OFF the power at specific points as instructed by the web interface.
Monitoring: Phases and general operation can be monitored via the web pages under "Status and Configuration – Controller – Phases."

Maintenance Features:

CPU Card Replacement: The guide provides a detailed step-by-step process for replacing the CPU card, including unplugging cables, removing the Heart and Licence cards, and inserting them into the new CPU card.
Optional Items: Instructions include checking for and transferring optional items like battery backup kits for RTC (Real-Time Clock) and CPU I/O cards.
Heart Card Management: Emphasizes the importance of transferring the Heart card from the old CPU to the new one and ensuring any pre-fitted Heart card in the replacement unit is removed and stored safely.
Configuration Restoration: The core maintenance feature is the ability to restore the controller's configuration from a saved restore point, ensuring continuity of operation after a CPU card replacement.
Fault Finding: After replacement and restoration, users are instructed to investigate any faults using the Fault Table, System Log, FFS, and FDS, and to consult the ST950 General Handbook for further information.
Proactive Maintenance (Tip!): It is highly recommended to create a "retained restore point" before making any changes to an ST950 controller. This acts as a backup, allowing the controller to be reverted to a known good state if changes prove detrimental or if the CPU card needs replacement. Instructions for creating these points are found in the handbooks and the Firmware Upgrade Quick Start Guide (667/HQ/46000/009).
Documentation: The guide references associated documents like the ST950 General Handbook (667/HB/46000/000) for comprehensive information on the device.

The ST950 CPU card is designed for efficient and reliable operation of traffic signal controllers, with robust procedures for replacement and configuration management, ensuring minimal downtime and accurate signal control.

YUNEX TRAFFIC ST950 Specifications

General

Brand	YUNEX TRAFFIC
Model	ST950
Category	Computer Hardware
Language	English