Abbreviations - Siemens Simatic Manual

Abbreviations

5 Abbreviations
CPU Central Processing Unit
CU Control Unit
DB Data Block
DINT Double Integer; 32-bit data type
DO Digital Output
DS Distributed Safety
EPOS Basic positioner; drive function
F-AI Fail-safe analog module
F-CPU Fail-safe central processing unit
FMEA Failure mode and effect analysis
HTL Type of incremental encoder
HW Hardware
I-DB Instance data block
INT Integer, 16-bit data type
PL Performance Level
SBT Safe Brake Test
SDI Safe Direction
SI Safety Integrated
SIL Safety Integrity Level
SIN/COS Sine-cosine; type of incremental encoder
SLS Safely-limited speed safety function
SLU Safe Length Unit
SOS Safe Operating Stop
SRS Safety Requirements Specification
SS1 Safe Stop 1
SS2 Safe Stop 2
SSI Synchronous serial interface; type of absolute encoder
STARTER Engineering tool for drives
STO Safe Torque Off
S7-Distributed Safety/SIMATIC Safety - fail-safe function blocks for storage and retrieval machines
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