Rockwell Automation 1771-CFM Config. Flowmeter Installation Instructions - Manual (Page 13)

Configurable Flowmeter Module 13
Publication 1771ĆIN043B-EN-P - July 2002
Modes of Operation
You configure the CFM module for these modes of operation:
Use this mode To
Indicators/
Alarms
Prover
Total
reset
Scaler
values
Rollover
value
Totalizer
• accurately measure counts using a flowmeter
or positive displacement meter
• trigger outputs directly from the CFM module
Ċ trigger on total, frequency, acceleration
• monitor flow total, rate, and rate of change
independent ofyour PLC processor scan times
• store counts based on external input
• scale the frequency and count to
engineering units
• interface to a prover
overrange
overflow
overspeed
acceleration
√ √ √ √
Nonresettable Totalizer
operate in the Totalizer mode with the count
reset function disabled to prevent loss of
accumulated value
overrange
overflow
overspeed
acceleration
√ √ √
HighĆresolution Frequency 1
(channels 0&1 or channels 2&3)
• monitor the frequency of an input with high
accuracy (e.g. shaft)
• monitor the rate ofspeed change
• operate outputs based on speed or
rate ofchange
• scale the frequency to engineering units
overspeed
overrange
acceleration
√
Direction Sensor 1
(channels 0&1 or channels 2&3)
• monitor the direction ofshaft rotation
• monitor rate ofchange and frequency
• trigger outputs based on direction, frequency,
rate ofchange
• scale the frequency and count to
engineering units
overspeed
acceleration
overrange
√
1 This mode uses two channels for one input (your input device is connected to F0 or F2, while F1 or F3 is unused).
In this mode
of operation
You can assign outputs that are programmable to trigger
Totalizer
on total, rate, rate change (acceleration), total overflow or
prover status
Nonresettable Totalizer on total, rate, rate change (acceleration), total overflow or
prover status
HighĆresolution
Frequency
on frequency or frequency rate of change (acceleration)
Direction Sensor
on either CLOCKWISE or COUNTERĆCLOCKWISE direction,
acceleration or frequency (outputs are triggered ON only)
If you want to configure the module You
through I/O Configuration software (if you
are using a PLCĆ5 family processor 1 )
enter the appropriate information on the
CFM module edit screens.
by editing bits at the address ofthe
BTW instruction
edit the data file addresses in the BTW
instruction to match your particular
application. Use the word assignments
on page 14 to edit the bits that apply to
your application(s).
1 See PLCĆ5 Programming Software I/O Configuration Manual, publication 6200Ć6.4.12, for
supported processors.