YOKOGAWA Centum-XL User Manual

5. System Functions After Upgrade
5-6
TI 33K01B10-50E
The table below shows a comparison of the detailed functions of the continuous control function
between the CENTUM V, CENTUM-XL, and CENTUM VP systems.
Table Comparison of Details of Regulatory Control Functions
Function
Items of Functions
Compared
CFCD2/CFSD EFCD-S1/H2, H4 Upgraded FCS
Off-scan and
service-off
(O/S)
Existence of
transmission
No transmission of statuses to other
instruments linked to instruments set to
off-scan.
Service-off (O/S) mode can even
be transmitted to function blocks
linked to the relevant block.
Possibility of data
read/write
Possible data read/write to relevant
instruments from other instruments set
to off-scan
In service-off (O/S) states, data
read/write to the relevant block
from other function blocks are
impossible.
Mode when regulatory
control instruments are
changed from off-scan
mode to on-scan mode
in sequence control
Returns to the mode immediately
before changing to off-scan mode
Mode (e.g., AUT/MAN) should be
specied.
CAL CAL handling Handled as an alarm Handled as data status
Scale high and
low limits
Possibility of reverse
setting of scale high/
low limits (SH/SL)
Scale values smaller than scale low
limit can be set to scale high limit.
Scale values smaller than scale
low limit cannot be set to scale high
limit. A reverse-scale display can be
applied.
Connection
terminal
Terminal Table Comparison of Connection Terminal Functions
Chain connection
One OUT terminal allows terminal
connections to multiple low-order
instruments.
Cascade signal distributor blocks
(FOUT) allow connections to
multiple low-order blocks.
Processing
when checking
IOP
PV value overshooting
Depends on input
signal states
FCS provides
group setting
Depends on function blocks
Mar. 27, 2015-00

YOKOGAWA Centum-XL Specifications

General

Brand	YOKOGAWA
Model	Centum-XL
Category	Industrial Equipment
Language	English