Yokogawa DAQWORX - Manual (Page 72)

2-42 IM WX103-01E
• Error Output [Error]
Outputs a relay contact signal when any of the following events occur in the main
module CPU of a unit containing a digital output module. When the CPU is normal,
the relay is energized and FAIL output is ON. When the CPU is abnormal or if a power
failure occurs, it is OFF.
• A data output request timeout (60 s) occurs while recording data.
(except when the MX100 /DS option functions are enabled)
• A module error occurs.
• An input module detected at power-on that is able to make measurements is
removed.
• A module breaks down.
• An unidentifiable module is attached.
When using the energize setting for contact output, the circuit switches from open
to short when the output is enabled. When using the de-energize setting, the circuit
switches from short to open.
Energzed/De-energzed Operaton of Output Relays
You can select whether the output relay is energized or de-energized when an output
event (such as an alarm) occurs. If de-energized is selected, the output relay behaves in
the same fashion as when an output event occurs if the power is shut down. The default
setting is Energized.
NO Energize
De-energize
C NO C NO C
NO C NO C NO C
When power is
shut down
NO: Normally Opened, C: Common
When alarm is
not occurring
When alarm is
occurring
Hold/Non-Hold of Output Relays
Select the behavior of the output relay when an output event is released (recovers to a
normal condition). The default setting is Non-hold.
• Turn OFF the output relay with the release of the output event (non-hold).
• Hold the output relay at ON until the Relay ACK button (see below) is clicked.
Relay ACK button
Output cause
occurrence
• When set to non-hold • When set to hold
Relay output ON
Relay output OFF
Relay ACK
Relay output ON
Relay output OFF
Output cause
occurrence
2.7 Dgtal Output