5. System Functions After Upgrade
5-1
TI 33K01B10-50E
5. System Functions After Upgrade
5.1 System Overview
5.1.1 Overall Control Functions
This section describes the enhancements of the overall control functions in FCS that is upgraded
to FFCS-V, hereinafter referred to as “Upgraded FCS.”
Operation upon power failure and recovery
1. Power recovery mode
If the power of a upgraded FCS fails, the operation of the CPU and I/O modules will stop.
The following shows the start conditions and start actions when the power recovers.
Start condition Start action
Initialization designation (MAN) —
Initial cold start
Timer designation (TIM)
Long-timepowerfailure(FCSpowerfailureperiod≥
momentary power failure detection time period)
Momentary power failure (FCS power failure period <
momentary power failure detection time period
Restart
Continuous designation (AUT) —
2. Operation of I/O module upon power failure and recovery
The CENTUM V and CENTUM-XL FCS’s have provided the same power supplies for I/O
modules and FCUs, while in a upgraded FCS, when I/O modules are changed to FIOs with
a separate power supply, it is necessary to consider an independent power failure.
When FIO remote nodes are used, it is also necessary to consider power failure and
recovery.
As an operation of I/O modules when an independent power failure occurs in FCU, an
output fallback function is provided. This function aims to hold the output of the output
moduleatthecurrentoutputvalueorforciblychangethemoduleoutputtoaspeciedvalue.
Mar. 27, 2015-00
To Next Page
Loading...
Need help?
General
