Operator control (hardware)   
2.2 Operator control elements 
  SIMOTION D4x5 
36  Manual, 02/2012 
Mode selector switch  
The following table contains the possible mode selector positions and the associated LED 
displays. The mode selector positions are explained in the order in which they are arranged 
on the SIMOTION D4x5. 
Table 2- 1  Mode selector position 
Selector position  Meaning  LED 
0  RUN  RUN 
1  STOPU  SU/PF 
2  STOP  STOP 
3  MRES  The MRES operating modes are indicated via the STOP LED. 
(ON/OFF/flashing, see 
SIMOTION D4x5
 Commissioning and 
Hardware Installation Manual) 
Other selector positions are not assigned 
The following table contains the states of the SIMOTION D4x5 that can be set via the mode 
selector. 
Table 2- 2  Mode selector settings 
Meaning  Explanations 
RUN  SIMOTION D4x5 runs the user program and all associated system services: 
•  Reading process image of inputs 
•  Execution of the user programs assigned to the execution system 
•  Writing process image of outputs 
The technology packages are active in this state. They can execute commands from 
the user program. 
STOPU  SIMOTION D4x5 is not processing a user program.  
•  The technology packages are active. Test and commissioning functions can be 
executed. The user program is not active. 
•  The I/O modules are in a secure state. (this means, for example, that digital outputs 
are "LOW" and analog outputs are deenergized or at zero current)