Rockwell Automation 1756-CFM ControlLogix Configurable Flowmeter Module - Manual (Page 53)

53 Rockwell Automation Publication 1756-UM010B-EN-P - December 2011
Configurable Flowmeter Module Features and Operational Modes 53
PreTrigger
PreTrigger works only on the Full Flow state. PreTrigger turns OFF the Full
Flow state when it determines that the Fill Transition or Fill Total Target will
be met before the next update. You must assign a channel to the local module
output for this feature to provide repeatable operation.
Fill Mode
Use Fill Mode to choose volume or time for Trickle mode operation.
Trigger On
Use Trigger On to determine what state triggers output 0 to energize. For
example, you can configure the CFM module to trigger an output when the
prover reaches a particular frequency.
The following events may trigger an output in Filler mode:
 Frequency - Input exceeds a certain frequency (latched).
 Acceleration - Input accelerates at a particular rate (latched).
 Full Flow State - Module is operating in the full flow state.
 Trickle Flow State - Module is operating in trickle state.
Tie to Counter
Choose which output is connected to which channel’s totalizer. There are two
outputs on each module.
Fill Enable
Use Fill Enable to reset the Fill Total value. This feature does not reset the
Gross Volume or Net Volume. You must use the reset for the Totalizer to
reset those values.