5.3 Addressing
5.3.1 Overview
To provide specific addressing of the installed peripheral modules, certain addresses
must be allocated in the CPU. At the start-up of the CPU, this assigns automatically
peripheral addresses for digital in-/output modules starting with 0 and ascending
depending on the slot location. If no hardware project engineering is available, the CPU
stores at the addressing analog modules to even addresses starting with 256. Modules at
the SPEED-Bus are also taken into account at the automatic address allocation. Here the
digital I/Os are stored beginning with address 128 and analog I/Os, FMs and CPs begin-
ning with address 2048.
5.3.2 Addressing
The CPU 314-6CF23 provides an I/O area (address 0 ... max. peripheral address) and a
process image of the in- and outputs (each address 0 ... 255). The process image stores
the signal states additionally in a separate memory area.
The process image this divided into two parts:
n
process image to the inputs (PII)
n
process image to the outputs (PIQ)
The process image is updated automatically when a cycle has been completed.
Maximally 8 modules per row may be configured by the CPU 314-6CF23.
For the project engineering of more than 8 modules you may use line interface connec-
tions. For this you set in the hardware configurator the module IM 360 from the hardware
catalog to slot 3 of your 1. profile rail. Now you may extend your system with up to 3 pro-
file rails by starting each with an IM 361 from Siemens at slot 3. Considering the max total
current with the CPU 314-6CF23 from VIPA up to 32 modules may be arranged in a row.
Here the installation of the line connections IM 360/361 from Siemens is not required.
Further 10 modules at the SPEED-Bus may be connected. CPs and DP masters that are
additionally virtual configured at the standard bus are taken into the count of 32 modules
at the standard bus.
You may access the modules with read res. write accesses to the peripheral bytes or the
process image.
To define addresses a hardware configuration may be used. For this, click on the proper-
ties of the according module and set the wanted address.
CAUTION!
Please take care not to configure a double address assignment at con-
nection via external PROFIBUS DP masters - required for project engi-
neering of a SPEED-Bus system! At external DP master systems, the
Siemens hardware configurator does not execute an address check!
Backplane bus periphery
Max. number of pluggable
modules
Define addresses by hard-
ware configuration
VIPA System 300S
+
Deployment CPU 314-6CF23
Addressing > Addressing
HB140 | CPU | 314-6CF23 | en | 19-01
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