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Using a Quantum IEC Hot Standby System
840 USE 106 00 January 2003 137
Transfer Status
Byte
The Section Hot Standby Transfer Status Byte can be read by an operator panel or
by Data Acquisition System. The purpose of the byte is to provide feedback to the
Application to indicate whether the Section Data is being transferred to the Standby
controller. If a fault occurs, then the Primary Controller Application or the SCADA
System will take appropriate measures to indicate a fault.
A fault could occur if:
the programmer disables the section from transferring
modifications are made to the sections but changes are not downloaded to both
controllers. This would cause the primary and the standby sections to be
different.
the Standby controller is not present
In the example below, the section name is LD1. To access this in the Primary
Controller application you would use the variable LD1.hsbyState.
Select Component of Type BOOL
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Components
LD1: SECT CTRL
disable: BOOL
hsby State: BYTE