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Release 03/2004
Operating Instructions (Compact) OP 77B
5–2
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The standard input unit for the OP 77B is the keyboard.
This is basically composed of two key groups:
•
Softkeys
F1 to F4 and K1 to K4
The function executed by each softkey is defined
specifically for a project during the configuration
phase; the softkey have no function in the Loader.
•
System keys
Digit keypad and control keys
Notice
Keyboard damage
Heavy-handed operation of the keys with a hard,
pointed or sharp object leads to a considerable
reduction in their service life and even to their complete
failure.
Only use your fingers to operate the HMI device keys.
5.2 Further Operating Elements
When an HMI device is installed, further operating
elements can be accessed by opening the switching
cabinet.
Danger
Danger, high voltage
After opening the switching cabinet, parts become
exposed which conduct voltage levels that could prove
fatal on contact.
Switch off the power supply to the switching cabinet
before opening it.