Siemens SINUMERIK MCU1720 Equipment Manual page 99

PCIe Peripheral Component Interconnect express: High-speed serial, differential full-duplex point-to-point inter‐
face with high data rate.
PCU PC Unit: computer unit
PE Protective Earth
PELV Protective Extra Low Voltage
PG Programming device
PLC Programmable Logic Control: programmable logic control (component of the CNC)
PN PROFINET
POST Power On Self Test
PP I/O modules
PTC Positive Temperature Coefficient
RAM Random Access Memory: program memory that can be read and written into
RCM Regulatory Compliance Mark
RFC Request for Comments
RI Ring Input: Incoming call
RS 485 Reconciliation Sublayer 485
RSS Really Simple Syndication
RT Realtime: data exchange without isochronous mode
RTS Reliable Transfer Service
RxD Receive Data
SATA Serial Advanced Technology Attachment
SD Secure Digital: secure digital memory card
SDRAM Synchronous DRAM
SELV Safe Extra Low Voltage
SIOS Siemens Industry Online Support
SMC Standard Motion Control
SME Sensor Module External
SSD Solid State Drive
SSH Secure Shell
SW Software
TCU Thin Client Unit (communication with operator panels)
TCP Transmission Control Protocol
TPM Trusted Platform Module
TS Teleservice
TxD Transmit Data
UDP User Datagram Protocol
UL Underwriters Laboratories
UMA Unified Memory Architecture
USB Universal Serial Bus
VDE Association of Electrical Engineering, Electronics and Information Technology (Germany)
VNC Virtual Network Computing
Full duplex An Ethernet/PROFINET port can simultaneously transmit and receive data.
W2k Windows 2000
WD Watchdog: Program monitoring with error detection and alarming.
MCU 1720
Equipment Manual, 09/2019, A5E47437728B AB
Appendix
A.1 Abbreviations
99