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13
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Up to 20 km round-trip circuit length.
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Configurable block evaluation modes include full feedback, small sample feedback, and optimistic feedback.
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Can command 10 blocks to 10 distinct states with one powerline message. Can command all blocks to one state with one
powerline message.
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Switches up to 600 lights, in 10 different groups, in less than 1 second.
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Switches 5 stopbar/lead-on lights simultaneously and presents real-back indication in less than 1 second.
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Status poll provides detailed Remote and lamp parameters.
2.3.2 Integrated System Control
Overall system configuration and control is realized via a control process with integrated web server for configuration and
maintenance.
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Each circuit is equipped with a microprocessor-controlled Master for tracking, recording and management of state of all
Remotes in the circuit.
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The Master communicates with all the Remotes (not light fixtures) in a circuit and polls all lamps independent from the control
system.
2.3.3 Architecture
Figure 7 depicts the general nature of the system components and their interactions. The “Control System”, shown in grey, is an
external ALCMS system that provides controlling commands and digests Master and Fixture status reports. There is typically only
one control system in the architecture. The “Master”, shown in blue, is the high voltage modem that communicates commands to
and receives status from the fixtures. There can be many masters in a given system. Masters digest commands from the control
system and provide status to it. Masters also communicate amongst themselves to maintain communication timing
synchronization. Each master communicates with the fixtures on its respective circuit.
Figure 7:
Series Circuit Master / Fixture Architecture
Control
System
Status
Commands
Master
Fixtures
Fixtures
Fixtures
Fixtures
Status
Commands
Master
Fixtures
Fixtures
Fixtures
Fixtures
Status
Commands
Commands
Status
Synchronization