Siemens SINUMERIK 840DE sl Commissioning Manual page 1545

5.3 Setting of the service switch (PCU 50.5 only)
Intended use
The "PCU Hardware Service" component as part of the PCU Base software provides a
function to read-out the switch positions.
Figure 5-2
Meaning of switch positions
Only the settings of the service switch that are relevant for the commissioning engineer are
listed:
Switch setting
PCU-Basesoftware (IM8)
Commissioning Manual, 02/2014, 6FC5397-1DP40-4BA0
Rotary coding switch (hexadecimal)
Mode of operation
0 ---
6 Users
9 Service
A Service
C Service
D Service
E Service
5.3 Setting of the service switch (PCU 50.5 only)
Function
Normal operation (default setting)
Reserved for additional software
Headless operation without OP/TP
Firmware recovery
Checking
Diagnostics
Booting from the emergency boot system
Service and diagnostics
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