HIMA HIQuad H41X, System Manual

Page: 105 / 110

System Appendix
HI 803 211 E Rev. 1.01.00 Page 105 of 110
Appendix
Glossary
Term Description
AI Analog input
AO Analog output
ARP Address resolution protocol, network protocol for assigning the network addresses to
hardware addresses
Backplane PCB Backplane PCB
COM Communication module
CRC Cyclic redundancy check
DI Digital input
DO Digital output
EMC Electromagnetic compatibility
EN European standard
ESD Electrostatic discharge
FB Fieldbus
FBD Function block diagrams
ICMP Internet control message protocol, network protocol for status or error messages
IEC International electrotechnical commission
Interference-free In this context, interference-free refers to safety-related and non-safety-related
modules, which may be operated within a rack, if they are marked as interference-free.
In terms of functional safety, the non-safety-related-module has no influence on the
safety-related modules
MAC Address Media access control address, hardware address of one network connection
PADT Programming and debugging tool (in accordance with IEC 61131-3), PC with SILworX
PELV Protective extra low voltage
PES Programmable electronic system
R Read: The system variable or signal provides a value, e.g., to the user program
R/W Read/Write (column title for system variable/signal type)
Rack-ID Rack identification (number)
rPP Peak-to-peak value of a total AC component
SELV Safety extra low voltage
SFF Safe failure fraction, portion of faults that can be safely controlled
SIL Safety integrity level (in accordance with IEC 61508)
SILworX Programming tool for HIMA systems
SNTP Simple network time protocol (RFC 1769)
SRS System.Rack.Slot addressing of a module
SW Software
TMO Timeout
tWDT Watchdog time
W Write, the system variable or signal receives a value, e.g., from the user program
WD Watchdog, device for monitoring the system's correct operation Signal for fault-free
process