Service selector switch
The following table shows the possible positions of the service selector switch. The service 
selector switch positions are explained in the order in which they are arranged on the 
SIMOTION D4x5‑2.
Table 3-3
Switch positions of the service selector switch
Service mode Switch position Meaning
- 0 No service/diagnostic functions activated (default setting)
Delete/restore 
non-volatile 
SIMOTION data
1
or
A → 1
When the "Delete/restore non-volatile SIMOTION data" switch 
setting is selected, the non-volatile data of the D4x5‑2 is first 
deleted and then restored along with the contents of the 
PMEMORY backup file.
Position "1": The data backed up with the system function 
_savePersistentMemoryData are preferably 
restored
Position 
"A" → "1":
(as of V4.4) 
The data backed up by service selector switch 
position 
"D" / web server / DIAG pushbutton are 
preferably restored
Web server in
Security Level 
Low
8 Switches the SIMOTION IT web server to Security Level Low, 
if the user database is empty.
You will find detailed information in the 
SIMOTION IT 
Diagnostics and Configuration
 Diagnostics Manual.
Downgrade 
(device update 
tool)
B SIMOTION D4x5‑2 control units and projects can be upgraded 
using upgrade data created at an earlier point in time. This 
upgrade 
data are generated with the device update tool (Menu: 
"Project>Start device update tool" in SIMOTION SCOUT).
If the upgrade process fails to bring about the desired result, 
the upgrade can be rejected by means of the switch position. 
This will roll the system back to the previous configuration.
Backup of 
diagnostic data 
and non-volatile 
SIMOTION data
D The diagnostic data and non-volatile SIMOTION data can be 
backed up in STOP, STOPU, and RUN state. The advantage 
of backing up in RUN state is the availability of enhanced 
diagnostic information (via HTML pages) and TO alarm 
information.
 
 
Note
Alternatively, 
diagnostic data and non-volatile SIMOTION data can also be backed up via the 
DIAG button, see Section DIAG button (Page 48).
 
Operator control (hardware)
3.2 Operator controls
SIMOTION D4x5-2
Manual, 04/2014 47