Rockwell Automation 1756-CFM ControlLogix Configurable Flowmeter Module - Manual (Page 58)

58 Rockwell Automation Publication 1756-UM010B-EN-P - December 2011
58 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
ncy