Overridden AO or BO Points Migrated from an N1 Network - 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

If you override an AO or BO point that was migrated from the N1 Network and then later release the override from the OWS, the NIE current status for that point still says Operator Override until a Release command is issued from the NIE; however, the value of the point in the NIE does change.

The NIE UI displays Operator Override when the object’s priority in the Metasys system has the highest priority (Priority 8). The point shows Software Override (SWO) in the N1 Network whether it is overridden at the OWS or at the NIE. If the point is overridden at the NIE, and then an AUTO command is issued at the OWS, the Priority 8 is still present at the NIE, but the value reverts to the last user command given at the OWS. That is, it does not show SWO at the OWS, but still shows Operator Override at the NIE.

Also, if Priority 8 is not active in the NIE, but the point is overridden at the OWS, the NIE shows Overridden at the NIE, and SWO at the OWS. The hardware tab on the NIE UI shows the N1 Network override state in the Overridden attribute. This is the override status as it appears in the N1 Network regardless of the NIE priority values. See Table 1 for more information.

Table 1. Behavior of Overridden Points
Overridden Point Commanded at Metasys OWS Commanded at NIE Overridden (Flag under Hardware Tab)

Point is not overridden at either NIE or OWS.

Override at NIE

SWO

Operator Override

TRUE

Override at OWS

SWO

Overridden

TRUE

Point is overridden at either NIE or OWS.

Override release at NIE

other

other

FALSE

Auto at OWS

other

Operator Override

FALSE

Point is overridden at OWS but not at NIE.

Override release at NIE

other

other

FALSE

Auto at OWS

other

other

FALSE

Point is overridden at NIE but not at OWS.

Override release at NIE

other

other

FALSE

Auto at OWS

Error Message

command already executed
   
Note: The value of a point at an NIE is always determined by the value at the NCM even if overridden to a value at the NIE.