Руководство - руководство по программированию в среде U90 Ladder (англ.язык)
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17. The net appears as shown below.
Indirect Clock function
Indirect Clock functions allows the programmer to write a Ladder program where the user will enter the time
value via the keypad. Functions are provided for:
Indirect Time of Day
Indirect Day of Week
Indirect Day of Month
Indirect Month
Indirect Year
These functions are located on the Clock drop-down menu of the Ladder toolbar.
Indirect Day of Week function
This example shows you how to create a project where a machine works according to a time that the user enters
via the keypad.
1. Select Indirect Clock Functions from the Clock menu of the Ladder toolbar.
2. Select Day Of The Week from the Indirect Clock Function menu.
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3. Place the Day Of The Week function on the desired net. Enter the desired Operand, Address and Symbol.
4. The Day Of The Week function appears with the selected Operand, Address and Symbol on the net.
5. To enable the user to view and modify the Indirect Clock function values, you must now create HMI
Displays and Variables. Click Variables on the Standard toolbar.
6. The Variable Editor opens. Select Time Functions for each Variable. Link the Variable to the appropriate
MI. Select the appropriate Variable Information Format for the time. Below is the Start Time Variable for
the time in hours.
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7. The Day of the Week Variable.
When you download the application to the controller, the user will use the Up/Down arrow keys to scroll
through the days of the week. When the display shows the correct day, the user selects it by pressing the Enter
key.
Note that in M90/91 controllers the Up key is numeric key 3, and the Down key is numeric key 6.
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Indirect Clock function example
This example shows you how to create a project where a machine is working according to a time and date
entered by the user via the keypad.
1. Select Indirect Clock Functions from the Clock menu of the Ladder toolbar.
2. Select Time from the Indirect Clock Functions menu.
3. Enter the desired Operand, Address and Symbol.
4. The Hour function appears with the selected Operand and Address. Note that the hour function is
checking a range between two MIs / SIs. Therefore, two Operands are needed: the beginning and the end
of the range.
The program automatically takes the next Operand from the one you enter. According to the following example,
you enter MI 1 and the program assigns the end of the range to MI 2, the next MI.
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5. Select Day Of The Week from the Indirect Clock Function menu.
6. Place the Day Of The Week function on the desired net. Enter the desired Operand, Address and Symbol.
7. The Day Of The Week function appears with the selected Operand, Address and Symbol on the net.
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8. Select Day of the Month from the Indirect Clock Function menu.
9. Enter the desired Operand, Address and Symbol. The Day of the Month function is a 32 - bit Bit map.
Therefore it requires two MIs / SIs.
The program automatically takes the next Operand from the one you enter. According to the following example,
you enter MI 4 and the program assigns the end of the range to MI 5, the next MI.
10. Select Month from the Indirect Clock Functions menu.
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11. Enter the desired Operand, Address and Symbol.
12. Place a Direct Coil at the end of the rung. Enter the desired Operand, Address and Symbol.
13. The net appears as shown in the next figure.
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14. To enable the user to view and modify the Indirect Clock function values, you must now create HMI
Displays and Variables. Click Variables on the Standard toolbar.
15. The Variable Editor opens. Select Time Functions for each Variable. Link the Variable to the appropriate
MI. Select the appropriate Variable Information Format for the time. Below is the Start Time Variable for
the time in hours.
16. The End Time Variable for the time in hours.
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17. The Day of the Week Variable.
18. The Day of Month Variable.
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19. The Month Variable.
20. Create the Displays for the Variables. Below is an example for viewing the time range in hours.