Releasing The Alarm Latch; Alarm Types - Omron K7DD User Manual

4 K7DD Function
4-4-2

Releasing the Alarm Latch

Once the result of the alarm judgment is turned ON, the status will be latched (continued) until released.
The following three methods are available for releasing the alarm latch.
Method to release the latch
Releasing with key operation
Operation command via
communications, Alarm Latch Cancel
Cycling the power supply (including a
power ON reset)
4-4-3

Alarm Types

The K7DD allows you to set two alarm types. The settings are available from the Support Tool or via
communications.
Type
Upper The alarm judgment result is turned ON/OFF under
limit the following conditions.
alarm • Turns OFF if the feature value is less than the
(default) critical/warning threshold.
• Turns ON if the feature value is equal to or greater
than the critical/warning threshold.
Lower The alarm judgment result is turned ON/OFF under
limit the following conditions.
alarm • Turns OFF if the feature value is greater than the
critical/warning threshold.
• Turns ON if the feature value is equal to or less
than the critical/warning threshold.
4 - 10
Refer to
details.
Refer to
It is released by cycling the power supply of the K7DD or by a power
ON reset executed when you move to the other level with key
operation. Refer to
(P.6-3) in 6-1 Levels for details.
Description of operation
Description
6-8 Operation Command with Key Operation (P.6-25) for
7-5 Operation Command (P.7-7) for details.
Procedure for Moving from Level to Level
Feature value
Alarm 1
Alarm 2
Alarm 1
Alarm 2
Power Line Data Generator User's Manual (N233)
Critical Threshold
Warning Threshold
t
ON
Upper
limit alarm
ON
OFF
Lower
limit alarm
OFF