Appendix
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HI 801 095 E Rev. 4.00
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