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Welcome to this tutorial for Mitsubishi Graphic Operation Terminal
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The Graphic Operation Terminal is the product name of
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Mitsubishi HMI's.
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Today's topic is about Numerical Display.
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The numerical display allows the data saved in the PLC CPU and
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other devices such as VFD's to be displayed as numeric values on GOT.
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Examples of data that can be displayed on the are motor speed through vfd,
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temperature, pressure or liquid level coming from process instruments,
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current, timer values or counter values.
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To add a numerical display to the screen editor
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click the numerical input/display icon directly
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and click on the screen editor on the desired location.
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When double clicked, numerical display or
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numerical input can be selected.
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By clicking on the dropdown button on the numerical input/display icon
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the numerical display or numerical input can be selected directly.
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In the Basic Settings, Device Style tab add the address of the device
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where the data to be displayed comes from.
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Numerical data can be monitored from data registers, timer values,
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timer set values, counter running values, counter set values,
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X input, example from thumbwheel switches,
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Y output, example outputs to seven segments digital displays,
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or M auxiliary relays.
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On our first example we will display the value of data register D11.
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Supposing we want to monitor the value that is transferred to D11,
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that is an example of numerical display.
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In the Data Type, we have choices from Signed BIN16 ,
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meaning 16 bit integers with negative and positive values,
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Unsigned BIN16 are positive 16 bit integers,
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The same as Signed BIN32 and Unsigned BIN32.
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The only difference is the length of data which is 32 bits.
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BCD16 is a 16 Bit Binary Coded Decimal,
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while BCD32 is a 32 Bit Binary Coded Decimal.
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Real numbers are floating point numbers
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that have the ability to represent fractional portions of whole numbers.
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Decimal is denary number or base 10 number that uses 10 digits from 0 to 9.
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Hexadecimal is a base 16 number from 0 to 9 and continues from A to F.
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Octal is a base 8 numbering system represented from 0 to 7.
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Binary is a Base 2 numbering system that has a value of 0 or 1.
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Real format is the same as in the Data Type which is a floating number.
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Selecting this option will display the numerical values with asterisk.
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This is useful when entering passwords.
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Set the number of digits for the numeric value to be displayed.
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Select this item for displaying zeros on the left to the numeric value.
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Format string is set if we want to include characters with the device values.
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Input "#" for the part where a numeric is displayed
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then type the alphanumeric characters and symbols.
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When Format String is used the Digit and Decimal point settings are disabled.
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The "#" signs set with the format string setting are replaced by a device value when displayed.
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Setting for Decimal Point will also be disabled when Signed or Unsigned Decimal is selected in the Format.
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If Real is selected the Decimal Point setting will be enabled.
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Decimal points can be adjusted
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to display the device value of integer as a value with decimal point.
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Shapes can be set as frames for numerical display.
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Now we will make a numerical display for counter values.
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In the Device setting select Counter and provide the address.
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We will be monitoring the counter value.
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Click the Display Case tab.
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Here we can add conditions
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to change the display according to the status of the monitored device.
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For example, when the output Y0 is activated.
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When Y0 is On, the display will blink. We will set to medium.
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and set the numerical to red.
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Extended Tab is for Security settings.
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This will be discussed on another tutorial regarding security settings.
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Trigger Tab sets conditions for displaying the object.
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For example we select ON, we have to set the Trigger Device also.
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If the trigger is satisfied,
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the input display will monitor the current value of the device.
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If the trigger is not satisfied, the value of the device will not be monitored.
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For example we enter M0 as the trigger device.
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If the Hold display is set, the display is hold
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even when the display condition is no longer satisfied.
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When the display condition is again satisfied
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the current value of the monitored device will be displayed.
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We will put a bit switch to increment the value of the counter.
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Another bit switch to reset the counter.
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Then a bit switch for the trigger device
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Since the trigger switch is OFF, the input display is not shown.
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When the trigger is switched On, the input display becomes visible.
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The value of the counter will be incremented everytime the switch is pressed.
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When the preset value is reached,
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the counter contact will close
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and the output Y0 will turn On.
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The numerical display will then start blinking and turn into red.
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That is because we have set a condition in the Display Case
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that when Y0 turns On, the numerical display will change its color
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into red and start blinking.
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Once we turn off the trigger switch
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the numerical display cannot be viewed.
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With the Hold Display, the numerical display is still visible
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but the value of the monitored device will be hold.
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When we turn off the trigger switch,
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even if the increment switch is pressed repeatedly
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the value displayed is not updated.
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Once the trigger switch is turned on,
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the numerical display will show the current value of the monitored device.
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That is the function of Trigger Device with Hold Display.
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Next we will see how to use the numerical display for other Data Type.
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This time we will use the data from Y output.
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This is from the seven segment display
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Practically BCD Data is very seldom used with HMI
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since binary numbers and real numbers are used for data manipulations.
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BCD Data can be used if there is existing BCD type devices
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that is interfaced or converted to HMI display.
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For example we select the BCD16 data type,
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we will set the device as Y20
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Click Shape to provide a frame for the numerical display
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and set the plate color.
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Supposing in the seven segment display we have a value of 125,
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this value is monitored in the numerical display.
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You will notice that the Y output has a value of 293.
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This is the equivalent value of the binary digits.
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For example we have a decimal value of 125.
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In BCD conversion, each of the decimal digit has its equivalent value.
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Decimal no. 1 is equal to 0001 in BCD.
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Decimal no. 2 is equal to 0010 in BCD.
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Decimal no. 5 is equal to 0101 in BCD.
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Now if we combine the three BCD values into one,
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it becomes a binary number 000100100101 which is equivalent to 293 in decimal.
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That is the reason why the value of Y output is 293 and not 125.
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Next we will make an example for Real Data Type numerical display.
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The Display Format will also be Real type.
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The device that we will use is D5 data register.
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This program is a conversion from analog to digital value.
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Data register D2 is from the input which is 0 to 10V converted to 0 to 4000 engineering units.
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this will be converted from integer to floating type number.
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If you notice it has decimal points in D3.
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Then that value will be divided by 40 to scale the 0-4000 engineering units
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will be scaled into 0 to 100°C.
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This will be the scaled value.
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As we can see we have two decimal points in the numerical display.
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Supposing we have an engineering value of 2500, this will be equivalent to 62.5°C.
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That is how we apply Real number in Data Format and Display Format.
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The monitored value should be floating type.
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In the PLC program the integer type should be converted to floating type.
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If we want to add a unit, that is "°C", we need to put hash (#) sign,
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we need to put hash (#) sign, that is three # signs,decimal point, two # signs and °C characters.
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There we have now the °C unit for the numerical display.
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For example our temperature input has changed,
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For maximum of 4000 engineering units, the equivalent is 100°C.
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That is for basic setup of numerical display using the data type Real and display format real.
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If we use BIN format we can adjust the decimal point int the display format.
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This is useful in PLCs that don't have floating number instruction.
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Examples are FX1S and FX1N model PLCs.
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What we can do is data manipulation so that we can
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display the decimal points through HMI
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although we don't have floating numbers in the PLC program.
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Decimal point will be adjusted in the display format setting.
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That is all for the basic setting on using the numerical display.
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Watch out for more tutorials on Mitsubishi GOT HMI.
