Devices connected to Smart Ports 24 are allocated slots in the TDMA cycle as defined in Table 3-2.
TABLE 3-2
Smart Port Time Slot Allocation
Device
Slot
Master
0
Switches
1-8
BLE
9
For switches, the slot address is set via a rotary selector. Each switch device should be set to a unique slot number. The Master uses Sync frames to indicate the start of each time slot. The Sync frames are 4 byte (3470.24us) messages. Each contains a fixed start of Sync frame character, a data character listing the slot number, a byte stating whether the slot is assigned and to what type of unit, and a simple checksum as shown in Table 3-3.
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