YOKOGAWA Centum-XL - Page 30

4. Procedure and Details of Upgrade
4-17
TI 33K01B10-50E
F040504E.ai
AUT
MAN CAS
RCASROUT
ROUT
(*1)
(MAN/AUT/
CAS)
ROUT(*1)
(MAN/AUT/
CAS)
When the supervisory computer is normal
When the supervisory computer is in FAIL
<Block mode diagram: CENTUM VP>
(*2)
MAN
AUT
DDCSPC
<Block mode diagram: CENTUM-XL>
CBMCBC
CBA
When the supervisory computer is normal
When the supervisory computer is in FAIL
(*2)
Figure Difference in the computer backup mode
*1: On CENTUM VP, either of the ROUT/RCAS modes and any of the MAN/AUT/CAS modes can effect concurrently.
*2: The current mode will be changed to any of the MAN/AUT/CAS (CBM/CBA/CBC in the case of CENTUM-XL) modes if the
supervisory computer is in FAIL, however, it is possible to set to which mode the current mode is changed through detailed
denitionforeachtag.OnCENTUMVP,itisnecessarytobuildanewapplicationwhichchangesintothecomputerbackupmode
if WDT communication with the supervisory computer is shut down.
Mar. 27, 2015-00