A7.4 Lm Functions - YOKOGAWA digitalYEWFLO Series User Manual

(3) In the LAS settings of the digitalYEWFLO,
set the values of V(FUN) and V(NUN) so
that they include the node addresses of
all nodes within the same segment. (Read
Figure A7.3.)
ConfiguredLinkSettingsRecord
(digitalYEWFLO Index 369 (SM))
Subindex Element
4 FirstUnpolledNodeId
7 NumConsecUnpolledNodeId 0xBA

A7.4 LM Functions

No. Function
1 LM initialization When a fieldbus segment starts, the
LM with the smallest [V(ST) × V(TN)]
value within the segment becomes
the LAS. At all times, each LM is
checking whether or not a carrier is
on the segment.
2 Startup of Transmits a PN (Probe Node)
other nodes message, and Node Activation
(PN and Node SPDU message to devices which
Activation SPDU return a new PR (Probe Response)
transmissions) message.
3 PT transmission Passes a PT (Pass Token) message
(including final bit to devices included in the live list
monitoring) sequentially, and monitors the RT
(Return Token) and final bit returned
in reply to the PT.
4 CD transmission Transmits a CD (Compel Data)
message at the scheduled times.
5 Time Supports periodic TD (Time
synchronization Distribution) transmissions and
transmissions of a reply to a CT
(Compel Time).
6 Domain download Sets the schedule data. The
server schedule data can be equalized
only when the Domain Download
command is carried out from outside
the LM in question. (The version of
the schedule is usually monitored,
but no action takes place, even
when it changes.)
7 Live list equalization Transmits SPDU messages to LMs
to equalize live lists.
8 LAS transfer Transfers the right of being the LAS
to another LM.
9 Reading/writing of Read APPENDIX 7.5 "LM
NMIB for LM Parameters."
10 Round Trip Delay Not yet supported in the current
Reply (RR) version.
Reply to DLPDU
11 Long address Not yet supported in the current
version.
<APPENDIX 7. LINK MASTER FUNCTIONS>
Default
Description
Value
0x25 V (FUN)
V (NUN)
Description
A7-3
IM 01F06F00-01EN