<Appendix 4. Link Master Functions>
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IM 01E21A02-03EN
A4.4 LM Functions
A4.4.1 LM Function List
No.
Function Name
Function
1
LM initialization function
Among LM devices, at startup, the device with the smallest [V(ST) x
V(TN)] value becomes the LAS.
At all times, each LM device is monitoring whether or not the BUS line is
in a no-signal state.
2
StartUp of other nodes
(PN and Node Activation
SPDU transmissions)
Transmits a PN (Probe Node).
Sends Node Activation SPDU to the device which returns a new PR
(Probe Response) message.
3
PT transmission
processing
(including FinalBit
processing)
Passes a PT (Pass Token) message to devices included in the live list
sequentially. Monitors the RT (Return Token) and final bit returned in reply
to the PT.
4
CD transmission
function
Transmits a CD (Compel Data) message at the scheduled times.
5
Time synchronization
function
Supports periodic TD (Time Distribution) transmissions and transmissions
of a reply to a CT (Compel Time).
6
DomainDownload
Server
Sets the schedule information. The schedule information can be
equalized only when the Domain Download command is carried out from
outside the LM in question. (The version information of the schedule is
usually monitored, but no action is taken even when it is different.)
7
Live list equalization
Transmits SPDU messages to the LM device to equalize live lists.
8
LAS transfer function
Function to transfer the right of being the LAS to another LM device.
9
Reading/writing function
of LM-related NMIB
See Section A4.5.
10
Round Trip Delay
Reply (RR)
DLPDU reply function
Not yet supported in the current version.
11
Long Address
Not yet supported in the current version.
