Yokogawa Data Acquisition with PID Control CX2000 - Manual (Page 25)

3-9
M-4659
Configuring the DX1000/DX2000
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Index
Alarm
Four alarms (Alarm 1 to 4) can be specified on each channel.
Type
Select H, L, h, l, R, r, T or t. The selectable alarms vary depending on the input mode
and computation type. For details, see chapter 3 in the User’s Manual IM04L41B01-01E
or IM04L42B01-01E.
Alarm value
Alarm is generated using the specified value as the boundary. The selectable range of
alarm values vary depending on the input mode and range.
Alarm delay
Set the alarm delay time to an integer between 1 and 3600 seconds.
Alarm is generated when the measured value stays above or below the specified alarm
value for the specified time (delay period).
Note
DX1000/DX2000 specifications
• The alarm delay time takes on a value that is an integer 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 the computation is stopped in a condition in which the computed value is exceeding the
alarm setting when a delay alarm is set on a computation channel, 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 at the new setting. This is also true for
the delay lower limit alarm.
Alarm Relay
To output relays, select the output relay number. Otherwise, select [None].
Detect
This can be selected when [Alarm No Logging] is turned [ON] under [Detail Setting] in
the [Basic Setting] tab.
Select whether to show or hide the alarm indication when an alarm occurs. If set to [OFF],
a signal is output to the alarm output relay or internal switch when an alarm occurs, but it
is not indicated on the screen. The alarm is also not recorded in the alarm summary.
3.3 Setting the Measurement Channels, Ext. Channels