23
Energization and de-energization
You can select whether to energize or to de-energize the relay when an alarm occurs.
Relay energization:
Alarm relay contact is closed when an alarm occurs.
Relay de-energization: Alarm relay contact is opened when an alarm occurs. The contact is closed during
normal operation. Note that the contact is also opened during no power is supplied to
PXR3 and during the initial action (“----“ is displayed) after power-up.
Alarm setting
To energize the relay output, set
and/or
to 1, 2, 3, or 4.
To de-energize the relay output, set
and/or
to 5, 6, 7, or 8.
Fig 5: Energization and De-Energization
ON
Alarm judgement
OFF
ON
OFF
ON
OFF
Relay energization
Relay de-energization
Alarm with hold
By using this function, you can let PXR3 go without
activating the alarm if the input on power-up falls
in the alarm range. If the input once goes out of
the alarm range and then falls into the alarm range
again, PXR3 will emit the alarm. This allows you to
start PXR3 without worrying about the effect of input
ÀXFWXDWLRQRQSRZHUXS
Alarm setting
To use the hold function, set
and/or
to 1,
2, 5, or 6;
not to use the hold function, set
and/or
to 3, 4, 7, or 8.
Note:
Alarm with hold is cancelled and the alarm is
activated when an input error (open loop, over-
range, or under-range) occurs.
Alarm OFF
Alarm ON
Alarm ON
Time
Alarm OFF
PV
If you set the alarm with hold,
no alarm is made.
Without
hold
With hold
Alarm
setpoint
Power-up
Fig 6: Lower Limit Alarm with Hold
