Siemens v1.0 Service Manual Page 73

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Simple example
2.6 Create HMI screen
STEP 7 Basic V10.5
Getting Started, 12/2009, A5E02651459-01
73
8. You also link this animation to the PLC tag "ON_OFF_Switch".
9. Change the appearance of the LED to reflect the status of the PLC tag. The LED should
flash as soon as the PLC tag is set to the bit value "0" by the control program.
Result
You have created and animated status LEDs using the graphic object "circle". The red LED
flashes in the initial state.
When the control program is started by means of the "Machine ON/OFF" button, the bit
value of the tag "ON_OFF_Switch" is set to "1" and the green LED flashes.
When the control program is stopped by pressing the "Machine ON/OFF" button again,
the bit value of the tag "ON_OFF_Switch" is set to "0" and the red LED flashes.
In the next section you will create the graphic object "Conveyor".
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