Point History - Metasys - LIT-1201535 - Supervisory Device - Network Engine

N1 Migration with the NIE Technical Bulletin

Brand
Metasys
Product name
Network Engine
Document type
Technical Bulletin
Document number
LIT-1201535
Revision date
2019-04-09
Language
English

Notes:

  • If you want to mimic Point History using Trend extensions in the NIEs, be aware that each extension you add in the Metasys system counts as an object.
  • Before adding Trend extensions for Point Histories, consider whether Point Histories are needed in the migrated Metasys system.

If the Metasys N1 Network object’s HISTORY_ATTR is true, a Metasys system Trend configured as follows is created. Point History is migrated as a Metasys system event trend, similar to Trend Migration, with fixed parameters as listed in Table 1.

Table 1. Point History Migration

Metasys System Trend Object Configuration Attribute Name/Type

Metasys N1 Network Point History Configuration Variable/Type

Notes

Buffer_Size/Unsigned16

48 or 10

NCM has 48 samples for AI, ACM, and AD; 10 for all others.

Log_Interval/Unsigned32

0 for binaries/multistates1800 seconds for analogs

Set the trend to be Change of Value (COV)-based for binaries/multistates. Set the trend to be sampled every 30 minutes for analogs.

Input_Reference/Structure

/system object name. PRESENT_VALUE_ATTR

Convert to reference (match as best you can the attribute number).