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Failsafe
P1-P808, P2-P1808 Fail-safe Mode
By default, if a fail-safe condition occurs, then the display, relays and the mA
output are held at their last
known values until a valid reading is obtained.
If required, then you can change this so that the unit goes to high (100% of span),
or low (empty) as follows:
Option Description
1 = Known (Default)
Remain at the last known value
2 = High Will fail to the high value (100% of Span).
3= Low Will fail to the low value (empty)
See Also P218, P228, P238, P248, P258, P268 - Relay Fail-safe and P840/P898 mA Output Fail-safe
Important Information
In the event of a fail-safe condition occurring, the display, relays and mA
Output can be configured to fail to a condition which is independent of each
other. To set independent
Relay Failsafe see P218, 228, 238, 248, 258, 268 .
And for independent mA Output Failsafe see P840/P898.
P1-P809, P2-P1809 Fail-safe Time
In the event of a fail-safe condition the fail safe timer determines the time before
fail-safe mode is activated.
Default = 2mins
If the timer activates, the unit goes into fail-safe , as determined by
P808/P1808 ,( Display ), P218, 228, 238, 248, 258, 268 ( Relays ) and P840/P898
( mA Output ). When this happens, the display/mA output/relay state will take on
that of the relevant fail mode.
When a valid measurement is obtained then the display, relays and mA output will
be restored and the timer is reset.