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

2.4.3

Rear view of the CPU

The following figure shows the connection elements on the back of the
CPU 1516T-3 PN/DP.
①
②
③
④
Figure 2-5
2.5

Mode selector switch

You use the mode switches 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- 5 Meaning of the mode switches
Operation of the mode switch
RUN
STOP
MRES
CPU 1516T-3 PN/DP (6ES7516-3TN00-0AB0)
Manual, 12/2017, A5E40898375-AA
Shield contact surfaces
Plug-in connection for power supply
Plug-in connection for backplane bus
Fixing screws
View of the CPU 1516T-3 PN/DP – rear
Meaning Explanation
RUN mode The CPU is executing the user program.
STOP mode The user program is not being executed. (STOP ACTIVE LED lights up).
Memory reset Position for CPU memory reset.
Product overview
2.5 Mode selector switch
27