 |
| Place of Origin: | GERMANY |
| Brand Name: | LENZE |
| Certification: | CE |
| Model Number: | E94AMHE0134 |
| Minimum Order Quantity: | 1pcs |
|---|---|
| Packaging Details: | carton |
| Delivery Time: | in stock |
| Payment Terms: | T/T, Western Union, MoneyGram |
| Supply Ability: | 100pcs/week |
| LENZE: | LENZE | E94AMHE0134: | E94AMHE0134 |
|---|---|---|---|
| GERMANY: | GERMANY | Material: | Iron |
| Color: | Black | Wire: | Wire |
| Temperature: | 20-90 |
| designed for the requirements of office environments. In industrial security, the | |
| objects to be protected are quite similar, but, to some extent, their priorities differ | |
| significantly. While the top priorities in office IT are typically the confidentiality and integrity of information, plant availability or operability come first in industrial |
security. When selecting appropriate security measures, it must always be ensured
that they provide the necessary level of protection without having unacceptable
impact on the actual operation.
of normal operation of a system against intentional or unintentional violations.
However safety systems also need to be particularly protected against such
violations.
It’s a machine vendor’s task to establish appropriate safety mechanisms. These
mechanisms must not primarily be included into the defense in depth concept,
even if they can contribute.
Whereas safety threats are basically static, security threats are dynamic during
lifetime of a machine / plant. Therefore the security protection needs to be
continuously revisedSecurity management is an integral part of an industrial security concept to
address all security-relevant aspects of an automation solution – either a single
machine, a plant section or an entire plant. As the potential threats to an
automation solution change over its life cycle a process to monitor and detect these
threats, known as security management, should be considered. The objective of
this process is to achieve the necessary security level of an automation solution
and to maintain it on a permanent basis. The risk analysis component contained
within a security management process ensures that only appropriate
countermeasures will be implemented to reduce the risks. An example of a security
management process is as follows:The following chapters show which integrated access protection mechanisms the
SIMATIC S7 controllers offer
2.1 Block protection
Overview
In STEP 7 V5.x and in STEP 7 (TIA Portal), there are different protection facilities -
to protect the know-how of the programs in the blocks against unauthorized
persons.
• Know-how protection
• S7 Block Privacy
If a block protected by this function is opened, only the block interface (IN, OUT
and IN/OUT parameters) and the block comment can be read. The program code,
temporary/static variables and the network comments are not displayed.
It is not possible to modify a protected block.
The following table gives an overview of the individual know-how protection
facilities:S7 Block Privacy
With the S7 Block Privacy, only FBs and FCs can be protected.
Know-how protection
With the attribute KNOW_HOW_PROTECT a know-how protection mechanism for
blocks of type OB, FB and FC can be activated.
Instance data blocks cannot be protected manually since they depend on the
know-how protection of the assigned FB. This means that the instance data block
of a password-protected FB also contains a know-how protection. This does not
depend on whether the instance data block has been explicitly created or
generated by a block call. In TIA Portal are also global data blocks allowed. ARRAY-data blocks could not be
protected with know-how protection.
