Siemens Simantic S7-1500 - Operator Controls - Rear View and Mode Selector

Product overview
2.6 Mode selector
CPU 1517T-3 PN/DP (6ES7517-3TP00-0AB0)
28 Manual, 12/2017, A5E36285525-AB
2.5.3
Rear view of the CPU
The following figure shows the connection elements on the rear of the CPU 1517T-3 PN/DP.
①
Shield contact surfaces
②
Plug-in connection for power supply
③
Plug-in connection for backplane bus
④
Fixing screws
Figure 2-5 View of the CPU 1517T-3 PN/DP - rear
2.6
Mode selector
You use the mode selector to set the operating mode of the CPU.
The following table shows the meaning of the corresponding operation of the operating mode
buttons.
Table 2- 6 Meaning of the mode switches
Operation of the mode switch
Meaning
Explanation
RUN RUN mode The CPU is executing the user program.
STOP
STOP mode
The user program is not executed. (STOP ACTIVE LED lights up).
MRES
Memory reset Position for CPU memory reset.