TransCore Amtech IT2200, Инструкция по установке, обслуживанию и ремонту

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System Components
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The check tag simulates a toll transaction, thereby providing a means for the reader to
check system operation. The check tag, activated on command by the lane controller,
provides a test of the antennas, RF source, preamplifier, encoder/decoder,
microprocessor, communications port, and I/O control.
The reader controls the check tag operation with an enable logic signal that lets the
check tag communicate through the reader in a manner similar to that of reading a
normal tag. The host computer can set the check tag to operate automatically at a
periodic rate or under command from the lane controller.
Check tag status failures permit troubleshooting and repair of sections of the system
(e.g., a lane), while the rest of the system remains operational.
Any data that is written to the check tag is erased if system power is lost. The default
check tag data is reloaded when system power is restored.
Tags
Tags are self-contained RFID devices that are capable of two-way communications
with a reader. Tags are available for interior or exterior installation. The IT2200
Reader System with Multimode Capability can read and write to IT2221, IT2211, and
IT2235 tags, and can read ATA tags. Tags used with the IT2200 system are passive,
battery powered. These tags are described in the following sections.
IT2221 Tag
The IT2221 Tag communicates with a reader via RF using an open protocol that has
been adopted by various transportation agencies. In addition, the IT2221Tag com-
mand set provides powerful capabilities for read/write access control and a non-pro-
prietary time division, multiple access (TDMA) protocol that can communicate with
multiple tags within an open-road configuration using a single reader. The multimode
version of this tag (IT2200 and ATA) is also available.