IFM Electronic CR0403 Programming Manual page 217

ifm Programming Manual ecomatmobile
Glossary of Terms
Disadvantages of flash memories
• A storage cell can tolerate a limited number of write and delete processes:
• Multi-level cells: typ. 10 000 cycles
• Single level cells: typ. 100 000 cycles
• Given that a write process writes memory blocks of between 16 and 128 Kbytes at the same time,
memory cells which require no change are used as well.
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FRAM
FRAM, or also FeRAM, means Ferroelectric Random Access Memory. The storage operation and
erasing operation is carried out by a polarisation change in a ferroelectric layer.
Advantages of FRAM as compared to conventional read-only memories:
• non-volatile,
• compatible with common EEPROMs, but:
• access time approx. 100 ns,
• nearly unlimited access cycles possible.
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H
Heartbeat
The participants regularly send short signals. In this way the other participants can verify if a
participant has failed.
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HMI
HMI = Human Machine Interface
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I
ID
ID = Identifier
Name to differentiate the devices / participants connected to a system or the message packets
transmitted between the participants.
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IEC 61131
Standard: Basics of programmable logic controllers
• Part 1: General information
• Part 2: Production equipment requirements and tests
• Part 3: Programming languages
• Part 5: Communication
• Part 7: Fuzzy Control Programming
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IEC user cycle
IEC user cycle = PLC cycle in the CODESYS application program.
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Instructions
Superordinate word for one of the following terms:
installation instructions, data sheet, user information, operating instructions, device manual, installation
information, online help, system manual, programming manual, etc.
BasicController (CR0403) Runtime System V03.02
217
2015-04-01