2.3
Device capabilities
2.3.1
Link active scheduler (LAS)
The transmitter can be designated to act as the backup LAS in the event that the LAS is
disconnected from the segment. As the backup LAS, the Rosemount 3051 will take over
the management of communications until the host is restored.
The host system may provide a configuration tool specifically designed to designate a
particular device as a backup LAS.
2.3.2
Capabilities
Virtual Communication Relationship (VCRs)
There are a total of 20 VCRs. Two are permanent, and 18 are fully configurable by the host
system. 25 link objects are available.
Network parameter
Value
Slot time
6
Maximum response delay
4
Maximum inactivity to claim LAS delay
47
Minimum inter DLPDU delay
7
Time sync class
4 (1 ms)
Maximum scheduling overhead
21
Per CLPDU PhL overhead
4
Maximum inter-channel signal skew
0
Required number of post-transmission-gab-ext units
0
Required number of preamble-extension units
1
Host timer recommendations
T1 = 96000
T2 = 9600000
T3 = 480000
Table 2-2:
Block
Time (in ms)
Analog input
20
PID
25
Arithmetic
20
Input selection
20
Signal characterizer
20
Reference Manual
Configuration
00809-0100-4774
July 2020
Reference Manual
21
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