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Product overview

3.6 Mode selector

3.5.4

Bottom view

Interfaces and synchronization modules

The figure below shows the position of the interfaces on the underside of the CPU.

① PROFINET IO interface X1 with 2 ports

② PROFINET IO interface X2 with 1 port

③ H-Sync interface X3 (H-Sync channel 1) without synchronization module

④ H-Sync interface X4 (H-Sync channel 2) without synchronization module

Figure 3-7 Bottom view

3.6

Mode selector

You use the mode selector to:

• Request a change to a specific operating state

• Disable or enable the change of a specific operating state

(if, for example, the mode selector is set to STOP, you cannot switch the CPU to RUN via a

communication task configured in the TIA Portal or via the display)

The following table shows the position of the switch and the corresponding meaning.

Table 3-1 Mode switch settings

Position

Meaning

RUN

RUN operating state

STOP

STOP operating state

MRES

Memory reset

Explanation

The CPU has permission to go to RUN.

The CPU does not have permission to go to RUN.

Position for CPU memory reset.

CPU 1517H-3 PN (6ES7517-3HP00-0AB0)

Equipment Manual, 11/2022, A5E42011886-AD