Siemens SIMATIC S7-1500 System Manual page 163

Display of the CPU
Personal injury and damage to property may occur
Personal injury or material damage can occur in hazardous are zone 2 if you remove or fit
the front panel while the S7-1500 automation system is running.
Before you remove or fit the front panel, always switch off the power supply to the S7-1500
automation system in hazardous area zone 2.
Control keys
The following keys are available on the CPU's display:
● Four arrow buttons: "up", "down", "left", "right"
● One ESC key
● One OK key
Figure 13-3
Note
If the display is in energy-saving mode or in standby mode, this mode can be exited by
pressing any key.
162
WARNING
Control keys
S7-1500 Automation System
System Manual, 02/2014, A5E03461182-AB