4-8 IM 04L20A01-01E
Setup Items
Alarm Output Relay Action, Action of Alarm Indication, etc.
• Reflash
Set whether to enable [On] or disable [Off] (initial value) the reflash alarm function of
the alarm relay output. The reflash alarm function is set to output relays I01, I02, and
I03 only.
• Relay
• AND
Select the relays that are to operate using AND logic. Set the range of relays (from
the first alarm relay) to take the AND logic. All subsequent relays will be set to OR
logic. Available selections are [None], [I01] (I01 only), [I01-I02] (I01 and I02), [I01-
I03] (I01 to I03), [I01-I04] (I01 to I04), [I01-I05] (I01 to I05), and [I01-I06] (I01 to
I06). Only the relays that can be used on the installed alarm option terminal block
(/A1, /A2, or /A3 option) are valid.
Note
If the reflash alarm is turned ON, the relays I01 to I03 are fixed to OR logic operation. [AND]
setting is invalid.
• Action
Select whether the alarm output relay is energized [Energize] or de-energized
[De_energize] when an alarm occurs. This setting applies to all alarm output
relays.
• Behavior
Select one of the following output relay behaviors when the alarm condition
switches from an alarm activated condition to an alarm released condition (normal
condition). The setting applies to all alarm output relays. If the alarm output relay
option is not installed, the setting is disabled.
• Nonhold (initial value): Turn OFF output relay when the alarm is released.
• Hold: Hold the output relay at ON until an alarm output release (alarm ACK)
operation is performed.
Note
If the reflash alarm is turned ON, the relays I01 to I03 are fixed to Non-hold behavior. [Hold]
setting is invalid.
•Indicator
Select the alarm indication behavior when the alarm condition switches from an alarm
activated condition to an alarm released condition from the following.
• Nonhold (initial value): Clear the alarm indication when the alarm is released.
• Hold: Hold the alarm indication until an alarm output release (alarm ACK) operation
is performed.
• Rate of change
• Increase
Select the sampling data count used to determine the interval for the high limit on
rate-of-change alarm from [1] to [15]. The interval is calculated as the scan interval
multiplied by the sampling data count.
• Decrease
Select the sampling data count used to determine the interval for the low limit on
rate-of-change alarm from [1] to [15]. The interval is calculated as the scan interval
multiplied by the sampling data count.
• Hysteresis
Turn [On] (initial value)/[Off] the alarm hysteresis. If set to [On], the hysteresis is set
to 0.5% of the measurement span or scale span.
4.2 Setting Alarm Related Parameters
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