WHR Cae Pawb Signalling Sim. User Guide

Welcome to WHR Cae Pawb Signalling Sim., a fascinating simulation application designed to replicate the intricate workings of the Cae Pawb diamond crossing on the Welsh Highland Railway (WHR). This simulator provides an engaging experience for users who wish to explore the complexities of railway signaling systems. Whether you're familiar with the real-world counterpart or are new to the concept, this guide will walk you through the features and functionalities of the application.

The Cae Pawb crossing is a critical junction where the WHR meets the mainline operated by Network Rail. As such, the simulator not only manages the WHR-specific "trap" points and associated signals but also interfaces with the broader Network Rail signaling infrastructure. This means that while the panel allows WHR trains to traverse the crossing in both directions, the Network Rail side remains independent and is managed separately by Machynllyth. However, when the panel is activated and the "release" is granted (indicated by the "Free" light turning on), Network Rail loses its ability to signal across the crossing. This creates a unique scenario where the Cambrian Line effectively becomes blocked until the situation is resolved.

For those already acquainted with Cae Pawb, the simulator offers a straightforward interface with minimal options. Users can choose between a WHR long train or a WHR engine, simplifying the process and enabling easier sound modeling. It’s important to note that other configurations, such as shorter train lengths or specific works trains, are omitted to maintain simplicity. Additionally, selecting a train direction—either "Up" or "Down"—and specifying whether it's an engine or full-length train must be done prior to adding the train to the simulation.

If you're curious about how failures work within the system, try clicking the "WHR Engine" option twice before adding the train. This action will cause the engine to turn red instead of green/blue, simulating a malfunction. Despite this, the engine will still proceed across the crossing but will remain approach-locked due to the relay oversight.

For newcomers to the world of Cae Pawb, here’s a step-by-step introduction to using the simulator:

1. Begin by opening the panel.
2. Contact Machynllyth via telephone to request permission to activate the crossing and secure the release. Select "Yes" on the simulated phone call to proceed.
3. Flip the power switch to the left twice to ensure the system powers up correctly.
4. Wait for the release to appear automatically or manually accelerate the process using the "Request" button.
5. Change the trap points to their reversed position by switching "Point 1" to the right, allowing WHR trains to pass safely.
6. Verify that both points are reversed and clear the signals by toggling "Point 2" to the right.

At this stage, the panel enters an "approach locked" state, anticipating an incoming train. Should no train arrive within the next two minutes, the signals can still be reset to danger mode, but they'll remain locked for approximately 120 seconds while the approach locking mechanism times out. During this period, normalizing the points isn't possible, although resetting the signals can be done if needed.

Next, choose the desired train movement by selecting either "Up" or "Down," followed by choosing "WHR Train" or "WHR Engine." Click "Add Train" to initiate the process. Afterward, a train will materialize on the tracks, accompanied by an announcement sound that should be silenced using the "TA Silence" button. There may be a slight delay—approximately 45 seconds—before the train appears on the track circuits.

Once the train crosses the junction, reverse the signal switches and return the trap points to their original positions. Conclude the session by calling Machynllyth again and utilizing the "Return" button to relinquish the release. Lastly, turn off the power and close the cabinet.

For additional resources, including different versions of the application compatible with Windows 32-bit and 64-bit systems, visit the provided Dropbox links. Detailed instructions are also available for download.

In conclusion, WHR Cae Pawb Signalling Sim. offers a comprehensive yet accessible platform for understanding the nuances of railway signaling operations. Its user-friendly design ensures that both novices and experienced users alike can enjoy exploring the intricacies of this vital junction.