7ML19981FB05 MultiRanger 100/200 – INSTRUCTION MANUAL Page 131
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Parameters
Failsafe (P070 to P072)
P070 Failsafe Timer
The time for invalid measurements to elapse before Failsafe State activates.
Once activated, the Failsafe State initiates the following:
1. The material level is reported based on P071 Failsafe Material Level.
• The unit responds to the new level as programmed (control and alarm relays
activate as defined by the programming).
• Individual relays can have independent failsafe responses. See
P129 Relay
Failsafe
.
2. The appropriate error is displayed:
• LOE for loss of echo from the transducer
• Short for a shorted transducer cable
• Open for a cut transducer cable
• Error for all other problems
When modifying the preset value, set it short enough to protect the process but long
enough to avoid false alarms. Only use No Delay (0.0 Minutes) for testing.
P071 Failsafe Material Level
The material level reported when a Failsafe State is initiated.
Select the Failsafe Material Level based upon the relay operation required during failsafe
operation.
Primary Index
Single Point Model Dual Point Model
Global Transducer
Values
Range: 0.0 to 9999
Preset 10.00 minutes
Altered by • P003 Maximum Process Speed
Related •P129 Relay Failsafe
Primary Index Level
Values
Range: -4999
to 9999
Value in units or % (-50% to 150% of span)
HI Level goes to maximum span
LO Level goes to 0 span (Empty)
HOLd * Level remains at last reading
Related
•P001 Operation
•P006 Empty
•P007 Span
• P111 Relay Control Function
• P112 Relay ON Setpoint
• P113 relay OFF Setpoint
•P129 Relay Failsafe
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