2 • Important CommentsSymbolsWAGO-I/O-SYSTEM 750ETHERNET TCP/IP1.2 SymbolsDangerAlways abide by this information to protect persons from injury.WarningAlways abide by this information to prevent damage to the device.AttentionMarginal conditions must always be observed to ensure smooth operation.ESD (Electrostatic Discharge)Warning of damage to the components by electrostatic discharge. Observethe precautionary measure for handling components at risk.NoteRoutines or advice for efficient use of the device and software optimization.More informationReferences on additional literature, manuals, data sheets and INTERNETpages1.3 Font ConventionsItalic Names of path and files are marked italici.e.: C:\programs\WAGO-IO-CHECKItalic Menu items are marked as bold italici.e.: Save\ A backslash between two names marks a sequence ofmenu itemsi.e.: File\NewEND Press buttons are marked as bold with small capitalsi.e.: ENTER< > Keys are marked bold within angle bracketsi.e.: Courier Program code is printed with the font Courier.i.e.: END_VAR1.4 Number NotationNumber Code Example NoteDecimal 100 normal notationHexadecimal 0x64 C notationBinary '100''0110.0100'Within ',Nibble separated with dots