YOKOGAWA Centum-XL User Manual

4. Procedure and Details of Upgrade
4-14
TI 33K01B10-50E
4.5.4 Functional Difference in the Data Item and Block Mode
Between CENTUM VP and CENTUM-XL, there are some functional differences in data items
and block modes. Particularly when they are connected to any supervisory computer, re-
examination taking also the operation into account comes to be necessary.
Functional difference that require reconstruction
Data items SV and MV
For SV data items of CENTUM-XL, apply either of SV/CSV/RSV depending on the function block
mode in CENTUM VP.
In addition, for MV data items of CENTUM-XL, apply either of MV/RMV depending on the
function block mode in CENTUM VP.
AsYOKOGAWAndsithardtojudgewhethertoproceedtoreconstructionbasedonlyonthe
investigation of existing applications, the customer is advised to conduct a dynamic test taking
also the operation into account.
Also, when the SPC mode or DDC mode of CENTUM-XL is used, it is necessary to undertake a
dynamic test while connecting to any supervisory computer. (When this dynamic test cannot be
performed with any supervisory computer, an appropriate test method shall be examined in the
consultation.)
If there is a piece of application which performs SV-writing at the time of CAS mode, it is
necessary to hold an additional consultation regarding the function taking also the loop
congurationintoaccount.
F040502E.ai
IN
SET
SUB
OUT
Input
processing
PV
Control
computation
SV
Output
processing
MV
CAS AUT/MAN/SPC
PV,ΔPV,MV,ΔMV
PV,ΔPV,MV,ΔMV
MAN/
DDC
CAS/AUT
IN
SET
SUB
OUT
Input
processing
PV
Control
computation
SV
Output
processing
MV
CAS
AUT/
MAN
MAN
CAS/AUT
CSV
RSV
RCAS
ROUT
RMV
<Function block diagram of PID: CENTUM-XL>
<Function block diagram of PID: CENTUM VP>
Figure Difference between the data items for SV and MV
Mar. 27, 2015-00

YOKOGAWA Centum-XL Specifications

General

Brand	YOKOGAWA
Model	Centum-XL
Category	Industrial Equipment
Language	English