Yokogawa Value Series FX1000 - Manual (Page 52)

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IM 04L21B01-64EN
Configuring the FX1000
1
2
3
8
Index
• 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 settings are [None], [I01] (I01 only), [I01-I02] (I01 and I02), [I01-I03] (I01
to I03), etc. Only alarm output relays that are installed are valid.
• Relay action
Select whether the alarm output relay is energized or de-energized when an alarm
occurs. The setting applies to all alarm output relays.
• Relay hold
You can choose to make the alarm output relays behave in the following ways. This
setting applies to all relays.
Settings Description
Unhold Turns the output relay OFF when the alarm condition is released (returns to
normal condition).
Hold Holds the output relay at ON until an alarm acknowledge operation is performed.
• Relay Action on ACK
Settings Description
Normal The relay output is deactivated when the alarm ACK operation is executed. If the
condition for activating the alarm output relay is met in the next scan interval, the
relay output is activated.
This operation is valid only when the alarm output relay is set to [Hold].
Reset The relay output is deactivated when the alarm ACK operation is executed. If a
new condition for activating the alarm output relay, the relay is activated.
Note
When reflash is turned ON, the operation of the first three output relays is set to nonhold.
Specifying Hold produces no effect.
Hysteresis
• Measure channel High/Low
Sets the hysteresis width of the alarm occurrence/release of the high/low limit alarm
specified on measurement channels.
Selectable range: 0.0% to 5.0% of the span or scaling width
• Measure channel Delta High/Low
Sets the hysteresis width of the alarm occurrence/release of the difference high/low
limit alarm specified on measurement channels.
Selectable range: 0.0% to 5.0% of the span
• Math channel High/Low
Sets the hysteresis width of the alarm occurrence/release of the high/low limit alarm
specified on computation and external input channels.
Selectable range: 0.0% to 5.0% of the measurement span
Alarm action
• No Logging
Select [ON] to hide alarm indication. The [Detect] setting is enabled in the [Measure
channel], [Math channel] tab(s).
This function disables the alarm indicator and the logging of alarm events to the alarm
summary.
2.6 Entering Basic Settings