X-AI 32 02 Appendix
HI 801 055 E Rev. 4.00 Page 55 of 60
Appendix
Glossary
Term Description
ARP
Address Resolution Protocol: Network protocol for assigning the network addresses
to hardware addresses
AI Analog Input
Connector Board Connector board for the HIMax module
COM Communication module
CRC Cyclic Redundancy Check
DI Digital Input
DO Digital Output
EMC Electromagnetic Compatibility
EN European Norm
ESD ElectroStatic Discharge
FB Fieldbus
FBD Function Block Diagram
FTT Fault Tolerance Time
ICMP Internet Control Message Protocol: Network protocol for status or error messages
IEC International Electrotechnical Commission
MAC address Hardware address of one network connection (Media Access Control)
PADT
Programming And Debugging Tool (in accordance with IEC 61131-3),
PC with SILworX
PE Protective Earth
PELV Protective Extra Low Voltage
PES Programmable Electronic System
PFD
Probability of Failure on Demand, probability of failure on demand of a safety
function
PFH Probability of Failure per Hour, probability of a dangerous failure per hour
R Read
Rack ID Base plate identification (number)
Non-reactive
Supposing that two input circuits are connected to the same source (e.g., a
transmitter). An input circuit is termed "non-reactive" if it does not distort the signals
of the other input circuit.
R/W Read/Write
SB System Bus (Module)
SELV Safety Extra Low Voltage
SFF Safe Failure Fraction, portion of safely manageable faults
SIL Safety Integrity Level (in accordance with IEC 61508)
SILworX Programming tool for HIMax
SNTP Simple Network Time Protocol (RFC 1769)
SRS System.Rack.Slot addressing of a module
SW Software
TMO TiMeOut
TMR Triple Module Redundancy
W Write
r
P
Peak value of a total AC component
Watchdog (WD)
Time monitoring for modules or programs. If the watchdog time is exceeded, the
module or program enters the ERROR STOP state.
WDT WatchDog Time
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