Symbol Table Allowed Addresses and Data Types

English
Mnemonics		 German
Mnemonics		 Description Data Type Address Range
I/O Signals
I E Input bit BOOL 0 to 65535.7
IB EB Input byte BYTE, CHAR 0 to 65535
IW EW Input word WORD, INT, S5TIME, DATE 0 to 65534
ID ED Input double word DWORD, DINT, REAL, TOD, TIME 0 to 65532
Q A Output bit BOOL 0 to 65535.7
QB AB Output byte BYTE, CHAR 0 to 65535
QW AW Output word WORD, INT, S5TIME, DATE 0 to 65534
QD AD Output double word DWORD, DINT, REAL, TOD, TIME 0 to 65532
Marker Memory
M M Memory bit BOOL 0 to 65535.7
MB MB Memory byte BYTE, CHAR 0 to 65535
MW MW Memory word WORD, INT, S5TIME, DATE 0 to 65534
MD MD Memory double word DWORD, DINT, REAL, TOD, TIME 0 to 65532
Peripheral I/O
PIB PEB Peripheral input byte BYTE, CHAR 0 to 65535
PIW PEW Peripheral input word WORD, INT, S5TIME, DATE 0 to 65534
PID PED Peripheral input double word DWORD, DINT, REAL, TOD, TIME 0 to 65532
PQB PAB Peripheral output byte BYTE, CHAR 0 to 65535
PQW PAW Peripheral output word WORD, INT, S5TIME, DATE 0 to 65534
PQD PAD Peripheral output double word DWORD, DINT, REAL, TOD, TIME 0 to 65532
Timers and Counters
T T Timer TIMER 0 to 65535
C Z Counter COUNTER 0 to 65535
Logic Blocks
FB FB Function block FB 0 to 65535
OB OB Organization block OB 1 to 65535
FC FC Function FC 0 to 65535
SFB SFB System function block SFB 0 to 65535
SFC SFC System function SFC 0 to 65535
Data Blocks
DB DB Data block DB, FB, SFB, UDT 1 to 65535
User-defined data types
UDT UDT User-defined data type UDT 0 to 65535
‹ Step 7 Elementary Data TypesupSiemens S7 Indirect Addressing ›

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