Siemens Simatic S7-400 - Cpus of the S7-400 - System-Wide Compatibility; Arrangement of the S7-400 Cpus Operator Controls and

CPUs of the S7-400
2-2
Automation System S7-400 Configuration and Use
A5E0044271 1-02
2.1 CPUs of the S7-400 - System-wide Compatibility
Introduction
There is a tiered range of CPUs within the S7-400. You can therefore select the
most suitable and economic solution for your application.
The following will describe a few of the features that the S7-400 CPUs have in
common and exemplify the system-wide compatibility. Figure 2-1 shows a
double-width CPU with its interfaces, operator controls and display components.
Operating mode switch
Slot for memory card
with memory ca rd
Incoming external buffer voltage
Module s lot with
interface module 1
Module s lot with
interface module
2
MPI/Profibus DP interface
Profibus DP interface
LED indicators INTF, EXTF,
BUS1F, FRCE, RUN, STOP,
BUS2F, IFM1F, IFM2F
Label with module name, product
version, abbreviated order number and
firmware version
Figure 2-1 Arrangement of the S7-400 CPUs’ operator controls and display components
Operating Mode Switch of the S7 -400
You can use the operating mode switch to set the CPU in the operating modes
RUN
or STOP or to bootstrap the CPU. The operating mode switch is a toggle
switch.
You can also change the operating mode in STEP 7.