Notification Center
The Counting Head Control (CHC) feature enhances system availability by continuously monitoring the condition of counting heads and their connected track sections, automatically detecting and correcting external interferences that could affect track section functionality.
This feature ensures that wheel sensors are only activated when a wheel passes over them. In cases where a sensor is damped without an actual train being present in the track sections next to it, the system keeps these track sections reported as clear. By placing the affected sensor in a standby mode, any false occupancy reports are effectively suppressed, ensuring consistent and reliable track status information.
Suppression of external influences
SIL 4 compliant
Trackside maintenance without affecting the free/occupied status
Higher system availability
Prevention of unnecessary downtime
The CHC feature functions as an intelligent layer within the axle counting system. Once configured, it oversees connected track sections and ensures that the predefined control logic is applied consistently, so counting heads operate only when required.
The resulting occupancy or fault information is provided via the Advanced Evaluation Board AEB. When a counting head is damped but no actual wheel passage is detected, the CHC logic keeps the associated track sections reported as clear. In case of external interferences, the CHC flags affected counting heads and initiates corrective actions to restore normal operation without manual intervention.
To watch this video, you need to enable "Targeting Cookies".
Please update your cookie preferences.
Within the AEB, a configurable parameter defines the maximum number of occupancy indications that may be suppressed for each wheel sensor system in a defined time window. If this limit is exceeded, the track section is automatically set to occupied to ensure fail-safe operation.
In the event of untimely occupancy indications, CHC verifies the section status against the configured logic and ensures that no occupancy output is generated via the AEB when the section is clear, preventing unnecessary interruptions to operation. As a result, temporary disturbances such as maintenance activities, do not result in unnecessary occupancy outputs, which directly supports higher system availability.
Contact our team to learn more about FAdC® features.
