YOKOGAWA Centum-XL - Page 23

4. Procedure and Details of Upgrade
4-10
TI 33K01B10-50E
Precautions when upgrading the I/O card
• FIO(FieldnetworkI/O)contactI/Osallowthedesignationofoperationmodeonapoint-by-
point basis. The operation mode, which varies with the type of I/O module, is selected by the
IOM builder.
• Oddandeventerminalsinthepulsewidthoutputmoduleandthestatusoutput/pulse-
widthoutputintegratedmoduleareidenticallydenedforeverytwoterminals.Ifdifferent
denitionsareused,changesinwiringarerequired.
• Ifthefollowingcardsareused,theirhardwarespecicationsarechangedtosoftware
specications,so,theexistingsystemsshouldbeexamined.
- ST2/ST3/ST4/ST5/ST7cards:OutputvalueswhentheCPUinaeldcontrolstationfails
(hold/OFF)
- PB5: Signal detection (rising/falling)
- MX2/MX3: Presence or absence of burnup
• Instrumentsthatallocatetwo-pointconsecutiveDI/Os,suchasswitchinstrumentSIO-22in
CENTUM V and CENTUM-XL systems allow crossover allocations between cards, but, FIO
in the CENTUM VP system does not provide those allocations. DI/O should be converted
to %SW using a sequence table. Valve monitor functions and I/Os of a CI/CO cannot allow
crossover allocations between cards either.
Precautions when upgrading the existing SC card
If the bus of FIO is used, SC cards can upgraded on a card-by-card basis. If the following cards
areused,theirhardwarespecicationsarechangedtosoftwarespecications,so,theexisting
systems should be examined.
• EP1:Loadresistance(200Ω/510Ω/1kΩ)andltersettings(ON/OFF)
• ET5/ER5/EM1/ES1:Disconnectionprocessing(burnup,burndown,ornone)
• EA5/EH5:Square-rootinputprocessing
Mar. 27, 2015-00