Datasheet

Frequency/Rate Meter K3MA-F 17
■ Setting Example
Initial Settings
The settings for the following example are shown here.
Example: Display conveyor belt feed speed
Here, the conveyor belt feed speed is to be displayed in units of 0.1
m/min.
• Proximity Sensor: E2E-X5E1, NPN output
When displaying a flowrate (e.g., in l/min or l/h), make the scaling
settings after confirming the I/O characteristics of the flowrate sen-
sor. There are flowrate sensors that output analog signals. If this kind
of flowrate sensor is used, consider using the K3MA-J.
1. Select the maximum input frequency for the K3MA-F.
Set the pulse frequency selection to either 30 Hz or 5 kHz. In the
example, this is set to 30 Hz because the conveyor belt is turning
at a slow speed.
Parameter: p-fre (pulse frequency), Setting value: 30
2. Set the scaling. The relationship between the display value and
the input value is shown in the following equation.
Rotations (rpm) = Frequency input/No. of pulses
per rotation
× 60
Cycle speed D (m/min) = Rotations
× roll circumference
=1/N
× f × 60 × d × π
N: No. of pulses per rotation
f: Frequency (Hz)
d: Roller diameter (m)
When the input conditions are applied to this equation, we obtain
the following:
Display value = 1/1
× f × 60 × 0.1 × π
For an input of 1 Hz, the display value is 18.8495 (m/min).
The scaling settings for the K3MA-F must be integers.
Also, to
decrease error, the scaling value is multiplied by 1,000, to obtain
an input of 1000 Hz and a display value of 18850. However,
because the display value in this case is displayed to the first dec-
imal place, the scaling is set as shown in the following example so
that 18850 is displayed for an input of 100 Hz.
Parameter Setting value
inp (scaling input value) 100
dsp (scaling display value) 18850
dp (decimal point position) %%%%.%
Note: The decimal point position here refers to the position in the
number after scaling. When setting the scaling display value, it
is necessary to consider the number of digits to be displayed
past the decimal point.
■ Troubleshooting
When an error occurs, error details will be displayed on the main indicator. Confirm the error from the main indicator and take the appropriate coun-
termeasures.
1
2
E2E-X5E1
Proximity Sensor
K3MA-F-A2 100-240VAC
0.1 m
MAX/MIN LEVEL MODE SHIFT UP
Max
Min
SV
dps
18850
inp
100
1 pulse/rotation, roller diameter 0.1 m
Display value
Input value
Level
display
Main indicator Error contents Countermeasures
Not lit e111 RAM memory error Repair is necessary.
Consult your OMRON sales representative.
5 e111 EEPROM memory error When this error is displayed, press the Level Key for 3 sec-
onds, and the settings will be restored to the factory set-
tings.
If the error cannot be recovered, repair is necessary. Con-
sult your OMRON sales representative.
Not lit Flashes 99999 The scaling display value exceeds 99999. Promptly change the input to a value that falls within the
specified range.
The scaling value may be inappropriate. Review the scal-
ing value at the initial setting level.
Not lit Flashes -19999 The scaling display value is lower than
−19999. Promptly change the input to a value that falls within the
specified range.
The scaling value may be inappropriate. Review the scal-
ing value at the initial setting level.