BACnet Network Traffic Simulator

Loaded — approaching capacity (75.6%)

Bus utilization is high. Token rotation time is rising — consider reducing polling rate, splitting the trunk, or raising baud.

ASHRAE 135 — BACnet MS/TP token passing: MS/TP is a collision-free master-slave / token-passing data link. Each octet takes ~11 bit-times; bus capacity = baud / 11 octets/s. Utilization is the ratio of offered data + token-pass traffic to that capacity. When offered traffic exceeds capacity, the token rotation lengthens and polls back up — they are deferred or dropped rather than colliding.

Bus Utilization vs Polling Rate · Linear Scale