Allen-Bradley 1756-CFM, User Manual

Page: 89 / 150

Rockwell Automation Publication 1756-UM010C-EN-P - June 2021 89
Chapter 5 Configure the Configurable Flowmeter Module
3. Access the module tags via the Tag Editor, see page 77 .
4. Change only the tags listed in Table 7 . You can ignore all other tags; they
do not affect High Resolution Frequency mode
Table 7 - Tag Changes Required for High Resolution Frequency Mode
Name Style Data Type Definition
Enter This
Value
C.Ch0LowFreqClear Decimal BOOL
Enables the minimum detectable frequency level for Channel 0.
Set the bit to 1 to enable it
1
C.Operations[0].OperationalMode Decimal SINT
Sets the module’s operational mode.
0 = OFF
1 = Totalizer Mode
2 = Non-Resettable Totalizer Mode
3 = High Resolution Frequency Mode
3
C.Operations[1].OperationalMode Decimal SINT
Sets the module’s operational mode.
0 = OFF
1 = Totalizer Mode
2 = Non-Resettable Totalizer Mode
3 = High Resolution Frequency Mode
0
C.Operations[0].AccelCalculation Decimal SINT
Number of past samples to use to calculate an acceleration value.
Sample range is 0 to 255.
50
C.Operations[0].MeterFactor Float REAL
Calibration Adjust for metering reading applied after K-factor
correction. Typically, this factor is between 0.8 and 1.2 but the
module restricts the value>0.
0
C.Operations[0].FilterResolution Float REAL
Sets resolution of the Speed calculation based on the raw counts
0 = default of 0.00001
0.00001 = resolution of + 1 count of 100,000 raw counts.
0.00001
C.Operations[0].SampleTime Float REAL
Sets time for a sample to be taken.
(2.0 second maximum sample time for High Resolution Frequency
mode and 5.0 second maximum sample time for Totalizer mode)
0.033
C.Operations[0].HighestAllowedFreq Float REAL
User-defined value between MinDetectableFreq and 120,000
When the frequency reaches this level, it sets the Overspeed alarm
limit
3700
C.Operations[0].AccelAlarmValue Float REAL
Sets Acceleration alarm limit
-Maximum acceleration (cycles per second
2
) <AccelAlarmValue<
+Maximum acceleration (cycles per second
2
)
100
C.OutputSetup[0].TriggerOn Decimal SINT
Sets when output 0 energizes
0 = No Action
1 = Frequency
2 = Acceleration
3 = Full Flow State (N/A in this mode)
4 = Trickle Flow State (N/A in this mode)
5 = Prover Run State (N/A in this mode)
6 = Prover Range State (N/A in this mode)
0
C.OutputSetup[0].TieToCounter
Ties a channel to output 0
0 = No connection
1 = Connect Channel0 to Output0
2 = Connect Channel1 to Ouput0
0
O.Total[0].CombinedCorrectionFactor Float REAL
0 = Default value of 1.0
Use this value to convert from Hz to RPMs. Results are displayed in
Frequency Average only
60
O.Total[0].Overrange Decimal BOOL
Enables the Overrange alarm on output connected to channel 1.
When the Frequency Average exceeds 100KHz, this alarm is set.
0 = No Alarm
1 = Alarm Enabled
0
O.Total[0].Overspeed Decimal BOOL
Enables the Overspeed alarm on output connected to channel 0.
When the Speed exceeds the Highest Allowed Frequency value, this
alarm is set.
0 = No Alarm
1 = Alarm Enabled
1