DVG IOM-ITVC-Basic-05, Installation, Set-Up, Operating & Service Manual

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ITVC Series – Intelligent Total Valve Controller IOM-ITVC-Basic-05
DVG AUTOMATION S.p.A.
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9.7.11 Alarm, MRT Alarm, Warning
The ITVC is provided with a powerful diagnostic program that monitors the hardware and the software execution and
generates
Alarms
,
MRT alarm
and
Warning
in case of malfunction. The table of the
Alarms
,
MRT alarms
and
Warnings is available in the paragraph Troubleshooting . The current Alarm / MRT alarm/ Warning can be locally
viewed by the procedure described in the paragraph “ Visualization of Alarms and Warnings ”
The ITVC carries out the following actions when an Alarm, MRT alarm and Warning occurs:
Warning : the ITVC does not perform any action, it only raises the local signalling of warning by the icon and by
the fuchsia LED of pushbutton . A remote signalling can be generated by the configuration options of the Output
Relays.
Alarm : the alarm condition is locally signalled by the icon and by the red LED of pushbutton , and remotely
by the tripping of the Monitor Relay. Depending on the type of malfunction the ITVC inhibits the commands to the
actuator or drives the valve in the safe position or only signals the failure.
MRT alarm : the MRT alarm condition is locally signalled by the icon and by the red LED of pushbutton ,
and remotely by the tripping of the Monitor Relay. In the list of the alarm is present “ MRT timer ”. The safe action due
to the malfunction is performed only when the
MRT
(
M
aximum
T
ime to
R
epair) expires. Setting of
MRT time
is done
by the option “MRT” in the ADMINISTRATOR menu, SETUP chapter. The option “MRT”, described in the
Instantaneous measure sub-menu paragraph, MEASUREMENT menu allows viewing the type of MRT alarm and the
remaining time before than the safe action starts. This procedure allows also clearing the MRT alarm . The procedure
resets the selected MRT alarm, but it is effective only if the malfunction is solved.
If the ITVC carries out the safe action in the alarm list appear the message “ Safety action ” and the issue that causes it
(Performing ESD, Line break action, Panic Button, etc.).
When an Alarm/Warning ceases, the list is automatically updated. In case of Alarms and Warning present at the same
time, only the Alarms can be viewed. The Warning can be viewed only after having removed the Alarms.
The RESET function, described in the paragraph “ Visualization of Alarms and Warnings ”, allows clearing the
selected alarm or warning. Reset will be effective only if the issue will be solved.
The above procedure does not reset the MRT alarm . They can be cleared only by the procedure described in the
“
Instantaneous measure sub-menu, MRT”
paragraph, MEASUREMENT menu.
9.7.12 Instantaneous and Historical data and graphs
The ITVC acquires the variables connected to its input channels and visualizes them as: Instantaneous measures, 24
hours records, Alarm history, Temperature history, Event history. The zoom facility allows viewing the details relevant
to one hour. The procedure to view the above data is described in the “ MEASUREMENT menu ” of ITVC HMI
chapter.

Instantaneous measure: the values are continuously updated.

24 hours records: L1, L2, S3, S4 pressure history, Position history.
o
The records are available only if the acquisition of data was previously enabled in the SETUP menu.
o Max memory capacity: 180 days/1 sensors, 120 days/2 sensors, 60 days/3 sensors

Event History :
o
The records are available only if the acquisition of data was previously enabled in the SETUP menu.
The following events are recorded: External ESD, PSLL/PSHH (if present), (PSWLL/PSWHH=
Pressure switch low-low or high-high), PSL/PSH (if present) (PSL/PSH= Pressure level low or high),
PB(if present) (PB=Panic Button)

Temperature history : it records the minimum and maximum temperature of the Logic and Power electronic
boards
 Alarm history : it records the last alarms and date (more than thousand), detected by the ITVC

PST, FST, Line Break, HPU, etc. : they are described in the ANNEX A,B,.., etc.
A
A