Reference Manual
00809-0100-4377, Rev BA
September 2010
2-9
Rosemount 752
Capabilities
Virtual Communication Relationship (VCRs)
There are a total of 20 VCRs. One is permanent and 19 are fully configurable
by the host system. Thirty link objects are available.
Host timer recommendations
T1 = 96000
T2 = 1920000
T3 = 480000
Block Execution times
PID = 10 ms
Arithmetic = 10 ms
Input Selection = 10 ms
Signal Characterizer = 10 ms
Integrator = 10 ms
RESOURCE BLOCK
FEATURES and
FEATURES_SEL
The parameters FEATURES and FEATURE_SEL determine optional
behavior of the Rosemount 752.
FEATURES
The FEATURES parameter is read only and defines which features are
supported by the Rosemount 752. Below is a list of the FEATURES the 752
supports.
UNICODE
All configurable string variables in the Rosemount 752, except tag names, are
octet strings. Either ASCII or Unicode may be used. If the configuration device
is generating Unicode octet strings, you must set the Unicode option bit.
REPORTS
The Rosemount 752 supports alert reports. The Reports option bit must be
set in the features bit string to use this feature. If it is not set, the host must
poll for alerts.
Network Parameter
Value
Slot Time
6
Maximum Response Delay
4
Maximum Inactivity to Claim LAS Delay
60
Minimum Inter DLPDU Delay
7
Time Sync class
4 (1ms)
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
Summary of Contents for 752
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