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Rockwell Automation Publication 1756-UM010C-EN-P - June 2021
Chapter 3 Configurable Flowmeter Module Features and Operational Modes
Configurable Output
Behaviors
Firmware revision 2.4 enables you to configure the 1756-CFM module outputs
to turn on or off at specified frequency counts.
Three types of behaviors, listed in the Frequency Values and Resulting
Behaviors table, can be configured with the use of firmware revision 2.4. Use
this table as a reference when determining on/off frequency values later in the
configuration procedure.
Table 5 - On/Off Frequency Behaviors
Frequency Value
Behavior
FreqOn = 0.0
FreqOff = 0.0
Typical behavior when firmware revision 1.
x
is used. If the C.OutputSetup[
X
].TriggerOn value
is 1, a frequency count corresponding to the TriggerOn frequency activates the
Ch[
X
]Overspeed Alarm, which latches and requires additional programming to unlatch.
FreqOff greater than
FreqOn
The specified channel turns off when the frequency count is at or above the specified FreqOff
value. The specified channel turns on when the frequency count is at or above the FreqOn
value. For example:
FreqOn greater than
FreqOff
The specified channel turns on when the frequency count is at or above the specified FreqOn
value. The specified channel turns off when the frequency count is at or below the specified
FreqOff value. For example:
FreqOff = 60
FreqOn = 20
Time
20
60
= On
Fr
eq
ue
nc
y
FreqOn = 60
FreqOff = 20
= On
Time
60
20
Fr
eq
ue
nc
y
