What is the ALCMS interface?
The link between the control and monitoring system and the field — proving commands go out, and status and alarms come back, exactly as they should.
The airfield lighting control and monitoring system (ALCMS) is how operators see and command the lights. Once the field system has been integrated, the interface between the ALCMS and the field is proved: commands sent from the screens must reach the CCRs, and the status and alarms shown must match what the field is really doing.
Each command and status point is checked one by one against the point list, together with the communication link, the screens and the event log. Each result is recorded. A defect is traced, fixed and re-tested. When the checks pass, operators can rely on the display.
- Comms link. Confirm the link to each CCR or controller, and that loss of link is detected.
- Point map. Check every command and status point against the point list and its circuit.
- Commands. Send on, off and brightness steps from the screens; confirm the CCR responds.
- Feedback. Confirm status is shown true and alarms are raised and time-stamped.
- Screens and logs. Check graphics match the field, and the event log and reports are kept.
- Record. Log each result; trace, fix and re-test any defect.
Frequently Asked Questions
Q1What is the ALCMS interface in airfield ground lighting?
The connection between the airfield lighting control and monitoring system (ALCMS) and the field equipment, mainly the CCRs. Commands go out from the screens, and status and alarms come back. Commissioning proves each of these exchanges works end to end.
Q2What does the ALCMS interface test cover?
The communication link to each CCR or controller, that every command and status point is mapped to the right circuit, commands from the screens, status and alarm feedback, and the screens, event log and reports that operators rely on.
Q3How is it different from system integration?
System integration joins the field parts, such as power, CCRs, local and tower control and interlocks, and proves they work as one. The ALCMS interface then checks that the control and monitoring software sees and commands that system correctly.
Q4What is a point list and why does it matter?
A point list is the schedule of every command, status and alarm signal between the ALCMS and the field, with the circuit each belongs to. Checking each point one by one finds swapped, missing or mislabelled signals before operators depend on them.
Q5Why test alarms and loss of communication?
Operators trust the display to show faults. Creating real or simulated faults, and cutting the communication link, shows whether the alarm appears on the right screen, is time-stamped in the log, and whether circuits stay safe and the display marks stale data.
Q6What happens if an interface check fails?
The defect is recorded, the cause is traced to the field wiring, the communication settings or the ALCMS configuration, and it is corrected. The affected points are re-tested, and the record keeps the failure, the correction and the passing re-test.
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