Yokogawa RotaMASS 3-Series - Manual (Page 47)

6. In-PRoCESS oPERatIon
6-1
IM 01R04B05-00E-E 3rd editionJuly 30, 2010 -00 all Rights Reserved. Copyright © 2005, Rota Yokogawa
6. IN-PrOCESS OPErATION
this chapter describes the procedure performed
when changing the operation of the function block
of the RotaMaSS in process.
6.1 Mode Transition
When the function block mode is changed to
out_of_Service, the function block pauses and a
block alarm is issued.
When the function block mode is changed to
Manual, the function block suspends updating of
output values. In this case alone, it is possible to
write a value to the out parameter of the block
for output. note that no parameter status can be
changed.
6.2 Generation of Alarm
6.2.1 Indication of Alarm
When the self-diagnostics function indicates that a
device is faulty, an alarm (device alarm) is issued
from the resource block. When an error (block er-
ror) is detected in each function block or an error
in the process value (process alarm) is detected,
an alarm is issued from each block. If an LCD
indicator is installed, the error number is displayed
as E-xx, the alarm number is displayed a a-xx
and the warning is displayed as W-xx. If two or
more alarms are issued, multiple error numbers
are displayed in 2-second intervals.
Figure 6.1 alarm Identification on Indicator
the error details corresponding to alarm indica-
tions on the LCD indicator and whether or not
switches are provided to disable the correspond-
ing alarms are shown in table 6.1. For the
alarms for which an alarm mask switch is pro-
vided, the default alarm settings are also shown.
those alarms for which an alarm mask switch is
not provided are enabled at all times. For how to
modify these mask switch statuses, see appendix
3, “operation of Each Parameter in Failure Mode.”
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