SECTION 3
Failsafe
On loss of power all relays will de-energise.
For other fault conditions e.g. damaged transducer, the failsafe relay state (after time delay
selected at Pr.10.4), is selectable:-
Pr.10.1
Relay 1 Relay 1 Failsafe
Distance Level Volume Pump OCM Differential
Default
Hold State Hold State Hold State De-
Energise
Hold State Hold State
Options displayed
Description
10.1.1 Relay 1 Energise Relay 1 energises when in fail condition
10.1.2 Relay 1 De-Energise Relay 1 de-energises when in fail condition
10.1.3 Relay 1 Hold State Relay 1 holds state when in fail condition
Pr.10.2 Relay 2 Relay 2 Failsafe
Distance Level Volume Pump OCM Differential
Default
Hold State Hold State Hold State De-
Energise
Hold State Hold State
Options displayed
Description
10.2.1 Relay 2 Energise Relay 2 energises when in fail condition
10.2.2 Relay 2 De-Energise Relay 2 de-energises when in fail condition
10.2.3 Relay 2 Hold State Relay 2 holds state when in fail condition
Pr.10.3 Relay 3 Relay 3 Failsafe (D = Hold State)
Options displayed
10.3.1 Relay 3 Energise Relay 3 energises when in fail condition
10.3.2 Relay 3 De-Energise Relay 3 de-energises when in fail condition
10.3.3 Relay 3 Hold State Relay 3 holds state when in fail condition
NOTE: Relay designated LOSS-OF-ECHO will always de-energise on failsafe.
Relay 3 Failsafe is not applicable in differential or OCM mode.
Pr.10.4
Fail Time Failsafe time delay
Distance Level Volume Pump OCM Differential
Default 600 600 600 30 30 600
Enter time delay value (in seconds) before unit goes to selected failsafe
positions. Minimum value is 30 seconds. Maximum Value is 9999 seconds.
Pr.10.5
mA Fail Analogue and Display Failsafe (Pump D = High)
(Other applications D = Hold)
Options displayed
Description
10.5.1 Analogue Low Set analogue output low
10.5.2 Analogue High Set analogue output high
10.5.3 Analogue Hold Analogue output holds its value
Ref: MINIFLEX LR MANUAL Rev. 0 30
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