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 Technical Guide > Control Components
 

Digital Panel Indicators

 

Digital Panel Indicators perform digital processing on or conversion and display of voltages, currents, other analog signals, and pulse signals. They can also compare input values to set values, transfer data, and perform other functions.

 

Overview of Digital Panel Indicators

 

. The Role of Digital Panel Indicator


Digital Panel Indicators digitally process measurement data such as analog signals from linear sensors (including voltages and currents) and pulse signals. It then converts and displays the data. They can also act as interfaces (see note) by performing operations such as comparisons with user-set values, and transmitting data to computers and PLCs.


OMRON Digital Panel Indicators have good visibility in the field, are easy to use, are waterproof, and conform to international standards. Communications with host computers or programmable controllers have been improved to provide functionality for advanced information systems, such as data collection to increase operating rates and data recording capabilities to provide for implementing measures for PL laws and ISO.


Note: An interface is the boundary between two devices.

 


Analog Signals


An analog signal is signal that changes continuously.
Types: 4 to 20 mA DC
1 to 5 VDC
0 to 5 VDC
0 to 10 VDC


Infrared Thermosensor

 

Infrared thermosensor
 


Proximity Sensor or Rotary Encoder

 

Proximity Sensor or Rotary Encoder
 


A Wide Range of Voltages/Currents

 

A Wide Range of Voltages/Currents



Displacement, Length Measurement, or Linear Output Sensors

 

Displacement, Length Measurement, or Linear Output Sensors

 


 

Main Functions


Scaling


Scaling is a function that converts the signal output from various sensors into physical measurement units (pressure, level, flow, etc.) before displaying it.


There are two scaling methods, one of which sets two points: any input value and its corresponding converted value. The other method is teaching by actual inputs.

 

Scaling

 


Position Meter


The present measurement value is displayed as a position in relation to the scaling width on a 20-gradation position meter.

 


Average Processing


Average processing of input signals with extreme variations eliminates flicker in the display and reduces the effect of noise in the input signal.
There are two types of averages that can be used, the simple average and the moving average.

 


Forced Zero

 

It is possible to shift the present value to zero by selecting zero from the front-panel keys. It is useful for setting reference values for measurement.

 


Timing Chart of a Forced Zero

 

Timing Chart of a Forced Zero

 


Timing Hold


Prompted by an external timing signal, it can simultaneously measure the maximum value, minimum value, and the difference between maximum and minimum values.

 


Maximum/Minimum Hold


Holds the maximum and minimum measurement values.

 


Display Color Selection


The color of the PV display can be set to either green or red. It is also possible to set the current value to change color according to the status of the comparative output.

 


Bank Selection


It is possible to switch between eight comparative value banks using the keys on the front-panel or external inputs.
 

 

 

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