
• 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 unidentiable 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.
Energized/De-energized Operation 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.
NOEnergize
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.
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 Digital Output
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