System Manual Compact Systems Appendix
HI 800 141 E Rev. 2.02 Page 103 of 110
Appendix
Glossary
Address resolution protocol: Network protocol for assigning the network addresses to
hardware addresses
Programming tool for HIMatrix systems
Electromagnetic compatibility
Internet control message protocol: Network protocol for status or error messages
International electrotechnical commission
Media access control address: Hardware address of one network connection
Programming and debugging tool (in accordance with IEC 61131-3),
PC with SILworX or ELOP II Factory
Protective extra low voltage
Programmable electronic system
Read: The system variable or signal provides value, e.g., to the user program
Base plate identification (number)
Supposing that two input circuits are connected to the same source (e.g., a
transmitter). An input circuit is termed interference-free if it does not distort the signals
of the other input circuit.
Read/Write (column title for system variable/signal type)
Safe failure fraction, portion of faults that can be safely controlled
Safety integrity level (in accordance with IEC 61508)
Programming tool for HIMatrix systems
Simple network time protocol (RFC 1769)
System.Rack.Slot addressing of a module
Write: System variable/signal is provided with value, e.g., from the user program
Peak-to-peak value of a total AC component
Time monitoring for modules or programs. If the watchdog time is exceeded, the
module or program enters the ERROR STOP state.
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