Yokogawa Data Acquisition with PID Control CX2000 - Manual (Page 256)

7-10
IM 04L31A01-01E
• Action
Select whether the alarm output relay is energized [Energize] or de-energized
[De_energize] when an alarm occurs.
• Behavior
Select one of the following output relay behaviors when the alarm condition switches
from an alarm activated condition to an alarm released condition (normal condition).
The setting applies to all alarm output relays. If the alarm output relay option is not
installed, the setting is disabled.
• Nonhold (initial value): Turn OFF output relay when the alarm is cleared.
• Hold: Hold the output relay at ON until an alarm ACK operation is performed.
• Indicator
Select the alarm indication behavior when the alarm condition switches from an alarm
activated condition to an alarm released condition from the following.
• Nonhold (initial value): Clear the alarm indication when the alarm is cleared.
• Hold: Hold the alarm indication until an alarm ACK operation is performed.
Note
The indicator setting also applies to control alarms.
• Rate of change
• Increase
Select the sampling data count used to determine the interval for the high limit on
rate-of-change alarm from [1] to [15].
• Decrease
Select the sampling data count used to determine the interval for the low limit on
rate-of-change alarm from [1] to [15].
• Hysteresis
Turn [On]/[Off] the alarm hysteresis. If set to [On], the hysteresis is set to 0.5% of the
measurement span or scale span.
Setting the Memory Alarm
• Memory Alarm
When using the Manual Save procedure to save data in the internal memory to an
external storage medium, if the time until the internal memory becomes full reaches
the entered value for the Memory Alarm Time, an e-mail report is sent. You can
output a relay contact signal from the Memory End Output terminal on the terminal
block for the memory alarm option. Select one of the memory alarm times below.
You can turn OFF the Memory End Output function when not in use.
[1 hr] (initial setting), [2 hr], [5 hr], [10 hr], [20 hr], [50 hr], [100 hr]
Clearing Alarms (AlarmACK)
If the [AlarmACK] operation is performed, all alarm indications and relay outputs are
cleared. However, this operation is invalid if the alarm indication/output relay behavior is
set to [Nonhold]. The operation of clearing alarms is also possible using a remote input
(see section 11.5, “Setting the Measurement Remote Inputs”) or via communications
(see the DAQSTATION CX1000/CX2000 Communication Interface User’s Manual).
7.2 Settings Related to Measurement Alarms