Yokogawa Value Series FX1000 - Manual (Page 51)

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IM 04L21B01-64EN
Alarm
Basic Setting
• Reflash
To set the reflash operation on the alarm output relay, select [ON]. The reflash
function is set on the first three output relays.
Settings Description
Off Reflash is not used.
On Reflash is used. The relays are deactivated for approximately 500 ms.
• Rate of Change Decrease
Set the interval for the rate-of-change calculation of the low limit on rate-of-change
alarm in terms of the number of sampled data points (1 to 32). The actual interval is
obtained by multiplying the value specified here by the scan interval.
• Rate of Change Increase
Set the interval for the rate-of-change calculation of the high limit on rate-of-change
alarm in the same manner as the interval for the low limit on rate-of-change alarm.
• Hold
You can choose to make the alarm displays behave in the following ways.
Settings Description
Unhold Clears the alarm indication when the alarm condition is released (returns to
normal condition).
Hold Holds the alarm indication until an alarm acknowledge operation is performed.
Output relay
• Internal Switch AND
Select the internal switches that are to operate using AND logic. Set the range of
internal switches (from the first internal switch) to take the AND logic. All subsequent
switches will be set to OR logic.
2.6 Entering Basic Settings