Yokogawa Button Operated MV2000 - Manual (Page 93)

3-13
IM MV1000-01E
Measurement Channels and
Alarms
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App
Index
• Alarms > Relay
Turn relay output On or Off.
• Alarms > No.
Select the output relay or internal switch number when Relay is On.
• Alarms > Detect
The Detect setting is displayed if the alarm hide function (for details, see section 3.6)
is enabled. To display notifications when alarms are activated, select On. If you select
Off, when an alarm is activated, a signal will be sent to the alarm output relay and
internal switch, but no notification will be displayed. And the alarm will not be recorded
in the alarm summary.
• Alarm delay > Tme (for delay hgh/low lmt alarms)
Set the alarm delay time to an integer in the range of 1 to 3600 s.
Note
• The alarm delay time takes on a value that is an integral multiple of the scan interval. For
example, if the alarm delay time is set to 5 s when the scan interval is 2 s, the actual delay
time is 6 s.
• The delay alarm has the following special operations.
• If a delay alarm is set on a computation channel and computation is stopped when the
computed value exceeds the alarm setting, the alarm is turned On after the specified
period (delay period) elapses.
• The alarm detection operation is reset if a power failure occurs. The operation restarts
after the power recovers.
• If the alarm setting of the delay high limit alarm is changed when an alarm is
already activated and the input is greater than or equal to the new setting, the alarm
continues. For all other cases, the alarm detection operation starts using the new
setting. This is also true for the delay low limit alarm.
3.7 Settng Alarms on Channels