Manual

Communications Parameters
Table , 24, 25, and Table together list the communications parameters for
L
ONWORKS routers.
Table 23. Communications Parameters, Part 1
Parameter TP/XF-78 TP/XF-1250 TP/FT-10 TP/RS485-39
Transceiver ID 1 (0x01) 3 (0x03) 4 (0x04) 5 (0x5)
Media Isolated
Twisted Pair
Isolated
Twisted Pair
Free Topology
or Link Power
EIA-485
Twisted Pair
Neuron Chip to
Transceiver Interface
Differential Differential Single Ended Single Ended
Interface Bit Rate 78 kbps 1.25 Mbps 78 kbps 39 kbps
Input Clock 10 MHz 10 MHz 10 MHz 10 MHz
Minimum Clock Configurable;
default = 5
MHz
Configurable;
default = 10
MHz
Configurable;
default = 5
MHz
Configurable;
default = 5
MHz
Number of Priority Slots Configurable;
default = 4
slots
Configurable;
default = 16
slots
Configurable;
default = 4
slots
Configurable;
default = 4
slots
Average Packet Size Configurable;
default = 15
bytes
Configurable;
default = 15
bytes
Configurable;
default = 15
bytes
Configurable;
default = 15
bytes
Oscillator Accuracy 200 ppm 200 ppm 200 ppm 200 ppm
Oscillator Wakeup 0 µsec 0 µsec 0 µsec 0 µsec
Collision Detect (CD) No No No No
CD Term after Preamble N/A N/A N/A N/A
CD through Packet End N/A N/A N/A N/A
Bit Sync Threshold 5 bits 7 bits 4 bits 4 bits
Hysteresis 2 0 N/A N/A
Filter 1 0 N/A N/A
Network Bit Rate 78 kbps 1.25 Mbps 78 kbps 39 kbps
110 Communications Parameters for LONWORKS Routers