Yokogawa Data Acquisition with PID Control CX2000 - Manual (Page 78)

1-66
IM 04L31A01-01E
AND/OR of Alarm Output Relays
When a single alarm relay is shared among multiple alarms, you can select either
condition below to activate the alarm output relay.
• AND: Activated when all assigned alarms are occurring simultaneously.
• OR: Activated when any of the specified alarms is occurring.
Set the alarm output relays for taking the AND logic in the following fashion: “I01 (first relay)
to Ixx (where xx is the relay number).” The value is initially set to [None] (no AND relay).
Alarm
1 channel
AND
2 channel
OR
Alarm output relay
Note
When the reflash alarm is turned ON, I01 to I03 operates as reflash alarms. They are fixed to
OR logic operation. Specifying AND produces no effect.
Energized/De-energized Operation of Alarm Output Relays
You can select whether the alarm output relay is energized or de-energized when an
alarm occurs. If de-energized is selected, the alarm output relay behaves in the same
fashion as when an alarm occurs if the power is shut down. The setting applies to all
alarm outputs. The initial setting is [Energized].
NO Energized
De-energized
C NC NO C NC NO C NC
NO C NC NO C NC NO C NC
When power is
shut down
NO: Normally Opened, C: Common, NC: Normally Closed
When alarm is
not occurring
When alarm is
occurring
Hold/Non-hold Operation of Alarm Output Relays
You can select the following behavior when the alarm switches from the activated
condition to the released condition (reverts to the normal condition).
• Turn OFF the output relay with the release of the alarm (non-hold).
• Hold the output relay at ON until an alarm ACK operation is performed (hold).
The setting applies to all alarm output relays. The initial setting is [Non-hold].
1.15 Measurement Function > Measurement Alarm Related Settings