Siemens SIMATIC PCS 7 Operating Manual page 91

Basics of slot rules in PCS 7
Both the slot rules of the rack and the connection rules of the bus system are important for the
identification of a hardware component in PCS 7. As a general rule, SIMATIC controls are
structured as follows:
● Structure of the rack according to the slot rules of HW Config: Bus address
The power supply, the CPU and the input/output modules are plugged into the rack. The bus
address must be entered in the PAA object and be unique on the bus.
Example: A "1" is entered for the power supply.
● Connections according to the connection rules of the bus system: Addresses of inputs and
outputs
The bus system is connected to the CPU or a communication processor (CP). The
addresses are managed in blocks of 8 and written with the notation "Byte.BIT". The value
ranges from 0 to 7. The y position is incremented first, then the x position.
Example: The addresses for a digital input module with 24 inputs range from I0.0 to I2.7.
Note
Special rule for UR2H racks
With UR2H racks, all modules on the entire station are placed on one rack. This UR2H rack
is only divided into two areas electrically; the slots themselves provide space for two CPUs.
For this reason, the UR2H racks are not transferred to PAA as two racks with slots 1 to 9,
but as one rack with slots 1 to 18. This means that the first half of the slots are intended for
the first CPU, and the second half for the second CPU.
Accordingly, you have to match the slot numbers yourself with the UR2H racks.
Standard check when exporting from PAA to PCS 7
When exporting the hardware configuration:
The configured components are identified using the "Name" and "Article number" attributes.
Note
Checking the slot rules of HW Config
The content of the "Name" attribute is initially checked in the Automation Interface. In the event
of an error, the following message appears:
"The value of the "Name" attribute violates a slot rule of HW Config."
Standard check when importing from PCS 7 to PAA
When re-engineering, the hardware configuration applies to the import:
The configured components are identified using the "Article number" attribute and assigned to
the base objects in PAA.
See also
Overview of data exchange with PCS 7 (Page 15)
Plant Automation Accelerator 3.0
Operating Manual, 04/2019, A5E46351208-AA
14.4 Information on identifying hardware components
Engineering in PAA
91