Rosemount 8712, Reference Manual

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Reference Manual
00809-0100-4664, Rev BA
January 2010
Rosemount 8712
4-26
ON – The transmitter will generate a HART alert when the defined
conditions are met. If a digital output is configured for Flow Limit 1, the
digital output will activate when the conditions for mode 1 are met.
OFF – The transmitter will not generate a HART alert for the Flow Limit 2.
Mode 2
Mode that determines when the Flow Limit 2 HART Alert will activate.
> High Limit – The HART Alert will activate when the measured flow rate
exceeds the High Limit 2 set point.
< Low Limit – The HART Alert will activate when the measured flow rate
falls below the Low Limit 2 set point.
In Range – The HART Alert will activate when the measured flow rate is
between the High Limit 2 and Low Limit 2 set points.
Out of Range – The HART Alert will activate when the measured flow rate
exceeds the High Limit 2 set point or falls below the Low Limit 2 set point.
High Limit 2
Set the flow rate value that corresponds to the high limit set point for the Flow
Limit 2 alert.
Low Limit 2
Set the flow rate value that corresponds to the low limit set point for the Flow
Limit 2 alert.
Flow Limit Hysteresis
Set the hysteresis band for the flow limit to determine how quickly the
transmitter comes out of Alert status. This hysteresis value is used for both
Flow Limit 1 and Flow Limit 2.
Total Limit
Configure the Parameters that will determine the criteria for activating a HART
alert if the measured net total falls within a set of configured criteria. This
functionality can be used for operating simple batching operations or
generating alerts when certain flow conditions are met. This parameter can be
configured as a discrete output if the transmitter was ordered with auxiliary
outputs enabled (option code AX), or if this functionality has been licensed in
the field.
Total Control
Turns the Total Limit HART Alert ON or OFF.
ON – The transmitter will generate a HART alert when the defined
conditions are met.
OFF – The transmitter will not generate a HART alert for the Total Limit.
Field Comm. 1, 4, 2, 3, 4, 2
Field Comm. 1, 4, 2, 3, 4, 3
Field Comm. 1, 4, 2, 3, 4, 4
Field Comm. 1, 4, 2, 3, 4, 5
Field Comm. 1, 4, 2, 3, 5
LOI Key AUX. FUNCTION
Field Comm. 1, 4, 2, 3, 5, 1