Rear View Of The Cpu; Mode Selector - Siemens Simantic S7-1500 Manual

Product overview

2.6 Mode selector

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
②
③
④
Figure 2-5
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
RUN
STOP
MRES
28
Shield contact surfaces
Plug-in connection for power supply
Plug-in connection for backplane bus
Fixing screws
View of the CPU 1517T-3 PN/DP - rear
Meaning
RUN mode
STOP mode
Memory reset
Explanation
The CPU is executing the user program.
The user program is not executed. (STOP ACTIVE LED lights up).
Position for CPU memory reset.
CPU 1517T-3 PN/DP (6ES7517-3TP00-0AB0)
Manual, 12/2017, A5E36285525-AB