Yokogawa RotaMASS 3-Series - Manual (Page 24)

4. GETTING STArTEd
4-4 IM 01R04B05-00E-E 3rd edition July 30, 2010 -00 all Rights Reserved. Copyright © 2005, Rota Yokogawa
When using a capabilities (CFF) file, make sure
you use the right file for the intended device. the
RotaMaSS is offered in two types in terms of
capabilities:
(1) Without LC1 option: Featuring six aI function
blocks and two It function blocks
(2) With LC1 option: a PID function block is
added
using the wrong CFF file may result in an er-
ror when downloading the configured data to the
device. also, use the right DD files that accom-
modate the revision of the intended device.
4.5 reading the
Parameters
to read RotaMaSS parameters, select the aI
block of the RotaMaSS from the host screen
and read the out parameter. the current flow
rate is displayed. Check that MoDE_BLoCK of
the function block and resource block is set to
auto.
4.6 Continuous record
of Values
If the host has a function of continuously record-
ing the indications, use this function to list the
indications (values). Depending on the host being
used, it may be necessary to set the schedule of
Publish (the function that transmits the indication
on a periodic basis).
4.7 Generation of Alarm
If the host is allowed to receive alarms, gen-
eration of an alarm can be attempted from the
RotaMaSS. In this case, set the reception of
alarms on the host side. RotaMaSS’s VCR-7 is
factory-set for this purpose. For practical purpos-
es, all alarms are placed in a disabled status; for
this reason, it is recommended that you first use
one of these alarms on a trial basis. Set the value
of link object-3 (index 30002) as “0, 299, 0, 6, 0”.
Refer to section 5.6.1 Link object for details.
Since the Lo_PRI parameter (index 4029) of the
aI block is set to “0”, try setting this value to “3”.
Select the Write function from the host in opera-
tion, specify an index or variable name, and write
“3” to it.
the Lo_LIM parameter (index 4030) of the aI
block determines the limit at which the lower
bound alarm for the process value is given. In
usual cases, a very small value is set to this limit.
Set smaller value than 100% value of XD_SCaLE
(same unit). Since the flow rate is almost 0, a
lower bound alarm is raised. Check that the alarm
can be received at the host. When the alarm is
confirmed, transmission of the alarm is suspend-
ed.
this chapter briefly explained how to connect the
RotaMaSS to a fieldbus and start using it. In
order to take full advantage of the performance
and functionality of the device, it is recommended
that it be read together with Chapter 5, where
describes how to use the RotaMaSS.