Introduction to the CPU 410
2.9 The SIMATIC PCS 7 project
CPU 410 Process Automation/CPU 410 SMART
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System Manual, 05/2017, A5E31622160-AC
You can protect function blocks (FBs) and functions (FCs) against unauthorized access
using the S7 Block Privacy application. You can no longer edit protected blocks in STEP 7.
Only the interfaces of the blocks are then visible.
If you protect blocks with S7 Block Privacy, you may encounter longer download and startup
times.
2.9.1
Scaling and licensing (scaling concept)
License management
License objects are process objects (PO) and their associated runtime licenses (RT-PO).
When a SIMATIC PCS 7 application is created, the SIMATIC PCS 7 system determines the
number of POs that corresponds to the scope of that application.
For productive operation of the SIMATIC PCS 7 application, there must be enough runtime
licenses (AS RT POs) to cover the required number of POs. The system expansion card of
the associated CPU 410-5H must also have at least the same PO count.
The CPU is scaled by means of the system expansion card, which means the system
expansion card determines the maximum quantity of POs. The CFC counts and manages
the POs used in the application. The number of POs that can be downloaded to the CPU is
limited to the maximum number of POs specified by the system expansion card.
Use of the system expansion card
The number of POs of a CPU 410 is stored on a system expansion card (SEC). You insert
the SEC in a slot on the back of the CPU before commissioning the CPU. The SEC is an
essential part of the CPU hardware. The CPU cannot be operated without an SEC. If no
valid SEC is detected, the corresponding CPU does not start up. A loss of synchronization is
triggered in the fault-tolerant system, in which a start-up block prevents automatic
reconnection. You cannot operate two CPUs 410 redundantly with two different SECs.
Expansion of a PCS 7 project
When you expand a SIMATIC PCS 7 project and load it to the CPU, the system checks
whether the project can run in the CPU with the current number of POs. If this is not the
case, you have two options to expand the number of POs:
●
Replacing the system expansion card
●
Online with CPU 410 expansion packs.
There are expansion packs with 100 POs and with 500 POs. These can also be
combined.
Expanding the number of POs by replacing the SEC
To replace the system expansion card (SEC), you must remove the CPU. You must replace
both SECs for redundant operation. The new SECs must have the same number of POs.