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from host 1 indicates the networking line has been connected and host 1 has registered host
2 in its networking setting; The fact that host 1 can’t receive alarm message of host 2 only
indicates that host 2 fails to register host 1.
Fault phenomenon: When the host is networking, with small
communication distance and low rate, the data packages
received are far less than the ones sent during bus quality check,
and the host networking is abnormal.
The networking of VST-3010W series host adopts a relevant advanced CAN BUS
protocol at the current, which requires serial connection of networked hosts only and
prohibits star connection. Besides, the protocol asks for the setup of a 120
Ω
terminal
resistance at both the beginning and the end of the networking without too much terminal
resistance in between, to ensure a high-speed and reliable networking bus.
Fault phenomenon: The host reports short/open circuit.
Hosts of VST-3010W series will report "short-circuit fault" automatically in case of
short-circuit or bus leakage current (more than 0.5A). When the circuit reports open-circuit
fault, check whether the connection of bus output terminal is well and then carry out
single-point test for any one-bus terminal, to examine whether the light at this address is
blinking. If the light is blinking, it means the bus circuit on the mainboard is at fault.