YOKOGAWA Centum-XL User Manual

5. System Functions After Upgrade
5-3
TI 33K01B10-50E
5.1.2 Comparison of Function Blocks’ Common Function
In the instruments of both CENTUM V and CENTUM-XL FCS, process input data are processed
as 0 to 100% normalized data, whereas the data are processed converted into engineering
quantity scales in the function blocks of upgraded FCS.
In addition, the input signal processing of upgraded FCS has no capability of line-segment
conversion or compensation functions. To transplant from existing FCS’s CENTUM instruments
that use these functions to upgraded FCS, input signals must be preprocessed by using general-
purpose calculation blocks.
Table Functions Common to Functional Blocks and Comparison of Corresponding Internal Instruments
CFCD2/CFSD
EFCD-S1/EFCD-H2, H4
Upgraded FCS
Existence
of function
Remarks
Input
signal
processing
Input
signal
conversion
No conversion X (*1)
Square-root
extraction
X (*1)
Pulse train input
conversion
X (*1)
Line-segment
conversion
— Use FUNC-VAR block instead.
Compensation — Use CALCU block instead.
Digitallter X
Totalizer X
Calibration X
CAL included in alarm statuses in old FCS is expressed as
a data status of process value in the upgraded FCS.
Output
signal
processing
Clamp X CLP+, CLP- and CND included in part of loop statuses
(LSUB) in old FCS are expressed as a data status of
output value in the upgraded FCS.
Conditional X
Output velocity limiter X
Output limiter X
Preset MV function X
MV index X
Output
signal
conversion
Analog output X
On/off output X
Pulse-width output X
Output to other
CENTUM
instrument
X
Alarm
processing
Input open check X
Input open alarms are checked by the input module.
Function blocks directly linked to the input modules accept
input module check results and conduct input open alarm
processing. The function blocks that are not directly linked
to the input modules generate open alarms if data causing
input open alarms are acknowledged.
Input high-high and low-low limit
check
X The alarms turn active at HH = 100% and LL = 0%.
Input high and low limit check X The alarms turn active at PH = 100% and PL = 0%.
Velocity check X
Deviation check X
Output open check X
Output open alarms are checked by the output module.
The output module check results are accepted as data
statuses (OOP) and output open alarms are handled.
Output open alarms occur in the function blocks directly
linked to the output modules.
Output high and low limit check X The alarms turn active at MH = 100% and ML = 0%.
Alarm bypass X
X: Equivalent function provided.
—: Substitute function provided.
*1: Ifrangeconversionisspeciedfortheanaloginputdata,convertsitintoanengineeringquantitywiththeSLtoSHscale.
Mar. 27, 2015-00

YOKOGAWA Centum-XL Specifications

General

Brand	YOKOGAWA
Model	Centum-XL
Category	Industrial Equipment
Language	English