Pulsar UltraTWIN, Инструкция по эксплуатации

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ULTRATWIN (UL) INSTRUCTION MANUAL
174
Failsafe
P*808 Failsafe 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 its last known value
2 = High Will fail to the high value (100% span)
3 = Low Will fail to the low value (empty)
See Also P*218, P228, P238, P248, P258, 268 - Relay Fail-safe and P*840 mA Output
Fail-safe
P*809 Failsafe Time
In the event of a failsafe condition the failsafe timer determines the time
before failsafe mode is activated.
Default = 2mins
If the timer activates, the unit goes into failsafe , as determined by P*808
( Display ), P*218, 228, 238, 248, 258, 268 ( Relays ) and P*840 ( mA
Output ). When this happens, you will see the message “ Failed Safe !” on the
display, along with a message explaining why (lost echo or transducer fault,
for example).
When a valid measurement is obtained then the display, relays and mA
output will be restored, and the timer is reset.
Important Notice
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 P*218, 228, 238, 248,
258, 268. And for independent mA Output Failsafe see P*840. c